Volvo 850 User manual

2.4L 5-CYL VIN [55]
1995 Volvo 850
1995-96 ENGINES
Volvo - 2.4L 5-Cylinder
850
* PLEASE READ THIS FIRST *
NOTE: For repair procedures not covered in this article, see
ENGINE OVERHAUL - GENERAL INFORMATION article in GENERAL
INFORMATION section. Repair information for this engine is
not available at time of publication.
ENGINE IDENTIFICATION
Engine may be identified by using Vehicle Identification
Number (VIN) stamped on a metal pad, located near lower left corner of
windshield. The sixth and seventh character identifies engine model.
Engine identification number, located on left side of
cylinder block below cylinder head, may be required when ordering
replacement parts.
ENGINE IDENTIFICATION CODES TABLE
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Engine Code
2.4L (Non-Turbo) ...................................... 55
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ADJUSTMENTS
VALVE CLEARANCE ADJUSTMENT
Engine is equipped with hydraulic lifters. No valve
adjustment is necessary.
REMOVAL & INSTALLATION
NOTE: For reassembly reference, label all electrical connectors,
vacuum hoses and fuel lines before removal. Also place
mating marks on other major assemblies before removal. Hood
removal is not necessary, as hood opens to horizontal
position. Removal and installation information for
turbocharger is not available at time of publication.
FUEL PRESSURE RELEASE
Fuel Pump Pressure Release
Before disconnecting any lines, cover fuel line connector
with shop towel to absorb any fuel left in line. With ignition key
removed from ignition switch, reconnect relay.
ENGINE
Removal
1) Remove expansion tank cap. Raise and support vehicle.
Remove splash guard and air baffle under engine. Drain all coolant by

opening drain cocks on cylinder block and radiator. Remove front
wheels, steering arm/wheel spindle joints, and nuts securing ball
joints to support arms.
2) Remove ABS wire and brake line retaining bracket bolt
located on inner fender panel, close to bottom of strut. Remove left
drive axle shaft. See AXLE SHAFTS - FWD article in DRIVE AXLES
section. Disconnect 2 thin Black hoses from evaporative fuel canister.
Remove White vacuum hose from vacuum reservoir.
3) Remove right drive shaft and intermediate bearing cap.
Carefully place components on steering servo pipes. Remove 2 right
engine mounting bolts. Loosen wheel arch liner to allow access to
mounting. Remove torque arm in gearbox. See Fig. 1. Install Sealing
Plugs (5488) in drive shaft holes.
Fig. 1: Removing Drive Shaft, Engine Mount Bolt & Torque Arm
Courtesy of Volvo Cars of North America.
4) Remove front exhaust pipe nuts and springs. Remove front
exhaust pipe bolts. Disconnect speedometer. Remove engine mounting
shield bolt. Lower vehicle.
5) Remove battery, battery self, and fresh air hose between
air intake and air cleaner housing. Disconnect MAF sensor connector
and primary lead between distributor and coil. Remove throttle pulley
cover. If equipped with cruise control, disconnect all necessary
electrical wiring and vacuum hose.
6) Disconnect intake hose at throttle body and idle air
control valve hose. Disconnect vacuum hose and crankcase ventilation

hose from intake hose. Disconnect vacuum hoses and connector from
solenoid valve. Disconnect heater hose. Remove air cleaner housing.
Disconnect throttle cable from throttle pulley. Remove torque arm.
7) Disconnect 2 heater hoses at firewall, brake servo hose,
and 2 HO2S connectors. Remove upper nut on rear engine mount.
Disconnect gear selector cables from mounting bracket on transmission.
Disconnect rubber-mounted section of cable bracket. On automatic
transmission equipped vehicles, disconnect 2 oil cooler hoses. On
manual transmission equipped vehicles, remove clutch slave cylinder
retaining ring. Remove slave cylinder from transmission.
8) On all vehicles, disconnect negative battery cable.
Disconnect lower radiator hose at radiator. Loosen and move air
cleaner mounting bracket aside. Remove rubber mount from air cleaner
bracket. On manual transmission equipped vehicles, remove clutch slave
cylinder through front hole in air cleaner bracket and place aside. On
all vehicles, place air cleaner bracket aside.
9) Remove electric cooling fan relays from fan shroud.
Disconnect connectors and place wiring aside. Remove 2 control module
box cooling air ducts. Remove 4 fan shroud screws from radiator. Use a
piece of plywood to protect radiator and slide fan housing back
slightly and remove air intakes. Remove fan.
10) Remove 2 long mounting bolts in A/C compressor. Leave
compressor in position until removing engine. Remove front engine
mounting pad nut and cable duct bracket mounting bolts. Remove intake
manifold and starter support brackets.
11) Disconnect upper radiator hose from thermostat housing.
Remove coolant hose between expansion tank and thermostat housing.
Remove expansion tank lower hose from fitting on engine. Remove drive
belt. Disconnect temperature sensor wiring from bracket on servo pump.
Remove 6 servo pump bolts. Leave servo pump in position at this time.
12) Remove protective cover over fuel distribution manifold.
Remove upper and lower fuel pipe clips. Remove fuel distribution
manifold bolts. Disconnect braided ground lead from engine. Secure
injectors with 5 Holders (5465). Lift and place fuel distribution
manifold (including injectors) aside. Remove engine wiring harness.
See Fig. 2.
Fig. 2: Removing Engine Wiring Harness
Courtesy of Volvo Cars of North America.
13) Remove spark plug cover and attach Lifting Lugs (5459 and
5464) to engine. Lift servo pump and place aside. Remove A/C

compressor and place on sub-frame. Lift out engine and transmission
using Lifting Yokes (2810 and 5428).
Installation
1) Attach Lifting Lug (5429) to rear of engine. Using Lifting
Yoke (5428) and Lifting Tool (2810), lower engine and transmission
into position. Guide engine mountings into position and tighten top
nuts to 37 ft. lbs. (50 N.m).
2) Support transmission with jack and remove lifting yoke
from engine. Using 2 Support Rails (5033), Lifting Beam (5006) and
Lifting Hook (5115), support rear of engine. Remove jack under
transmission. Using Transmission Lifting Fixture (5972), raise
transmission. Install transmission support member. Tighten bolted
joints between support member and side members. Tighten transmission
bump stop nut to 37 ft. lbs. (50 N.m).
3) Install control rod and reaction arm to lever mounting.
Install locking clip. Install oxygen sensor and reconnect electrical
connector. Using Socket (5244), tighten front and rear couplings.
Ensure "O" ring is okay and install air preheater pipe to exhaust
pipe.
4) Install air conditioning compressor to mounting. Reconnect
oil cooler lines. Tighten fittings to 26 ft. lbs. (35 N.m). Remove
lifting tools.
5) Reinstall coolant hoses to firewall. Install timing pick-
up and camshaft sensor connectors. Reconnect engine connector to
wiring harness connector on left wheel housing. Reconnect relay and
install wiring duct mounting nuts. Install harness connector cover.
6) Install fuel hoses, cruise control vacuum hose, ECC vacuum
hoses, brake servo vacuum hose, throttle cable and throttle pulley
cover. Install air mass meter and intake hose. Reconnect idling valve
hose and connector. Reconnect oil trap hoses. Reconnect 2 EVAP vacuum
hoses.
7) Install servo pump and drive belt. Install radiator and
radiator hoses, expansion tank hoses, and transmission oil cooler
lines. Tighten cooling line fittings to 26 ft. lbs. (35 N.m). Install
cooling fan. Install battery and reconnect positive cable.
8) Jack up vehicle and reconnect cooling lines to
transmission. Tighten fittings to 26 ft. lbs. (35 N.m). Install
exhaust pipe and heat shield. Install radiator mounting bolts, air
baffle under radiator, and splash guard under engine. Fill engine with
oil and cooling system. Connect negative battery cable. Start engine
and check for leaks.
INTAKE MANIFOLD
Removal & Installation
For intake manifold removal and installation, see
CYLINDER HEAD under REMOVAL & INSTALLATION.
EXHAUST MANIFOLD
Removal
Remove exhaust manifold-to-cylinder head nuts. Disconnect
front exhaust pipe. Remove 2 heat shields from exhaust manifold. Lift
manifold off studs, turn it 90 degrees, and lift out of engine
compartment. On vehicles with A/C, use care to avoid damage to switch
on A/C pipe.
Installation
Install manifold with NEW gaskets. Install front exhaust pipe
to manifold. Tighten manifold-to-cylinder head nuts to 18 ft. lbs. (25
N.m). Install heat shields. Using Loctite on bolts, and ensuring
springs and washers are under exhaust pipe nuts, tighten front exhaust

pipe-to-manifold nuts to end of threads. Do not tighten to more than
84 INCH lbs. (10 N.m).
CYLINDER HEAD
Removal
1) Disconnect negative battery cable. Remove expansion tank
cap. Remove splash guard under engine. Open drain cocks on cylinder
block and radiator and drain coolant. Remove exhaust manifold-to-front
exhaust pipe nuts. Remove exhaust manifold. See EXHAUST MANIFOLD under
REMOVAL & INSTALLATION. Remove timing belt. See TIMING BELT under
REMOVAL & INSTALLATION.
2) Lift and place fuel distribution manifold and injectors
aside. Install Holders (5465) to injectors. Disconnect 2 braided
ground leads from engine. Remove 4 fan shroud retaining screws. Remove
control module box cooling air ducts. Bend shroud aside slightly, lift
relay holder, and disconnect electric cooling fan connectors. Remove
control module box and air cleaner intakes. Lift out electric cooling
fan assembly.
NOTE: Avoid damage to injector nozzles and needles.
3) Disconnect Idle Air Control (IAC) valve and Throttle
Position (TP) potentiometer connectors. Disconnect crankcase
ventilation and EVAP canister hoses. Disconnect servo (vacuum)
reservoir and intake manifold vacuum servo hoses. Remove intake hose.
4) Remove 3 intake manifold upper mounting bolts. Remove oil
dip-stick and bracket from intake manifold. Loosen manifold lower
mounting bolts a few turns. Remove manifold bracket bolt. Remove
intake manifold.
5) Disconnect upper radiator hose from thermostat housing.
Mark camshaft pulleys for reassembly reference and remove camshaft
pulleys. Remove timing belt cover inner bolt. Remove air cleaner
housing and hoses. Remove Camshaft Position (CMP) sensor and shutter.
Remove distributor cover, rotor and ignition lead clip. Remove torque
arm and brackets. Starting at outer edge and working inward, remove
bolts in upper half of cylinder head. Remove upper cylinder head by
very carefully tapping upward with a copper mallet at parting lugs and
camshaft pulley end. Mark camshafts for reassembly reference and
remove camshafts.
6) Remove 2 coolant pipe bolts. Starting at outer edge and
working inward, remove cylinder head bolts. Remove cylinder head. See
Fig. 3. Remove cylinder head gasket.

Fig. 3: Exploded View Of Engine Assembly
Courtesy of Volvo Cars of North America.

Fig. 4: Removing Components From Rear Of Engine
Courtesy of Volvo Cars of North America.
Installation
1) Remove starter and protective plug. Install Crankshaft
Locking Tool (5451). See Fig. 5. Turn crankshaft counterclockwise
until stopped by tool. Using NEW gasket, install bottom half of
cylinder head. Oil bolts and tighten, in sequence, in 3 steps. See
Fig. 6. See TORQUE SPECIFICATIONS. Install coolant pipe with NEW
gasket.
Fig. 5: Attaching Crankshaft Locking Tool (5451)
Courtesy of Volvo Cars of North America.

Fig. 6: Cylinder Head Bold Tightening Sequence
Courtesy of Volvo Cars of North America.
2) Install NEW cylinder head gasket and "O" rings in spark
plug wells. Remove No. 1 and No. 5 spark plugs. Oil lower camshaft
bearing seats. Using a roller, apply Sealing Compound (1 161 059-9) to
upper section of cylinder head. Ensure sealer does not penetrate oil
passages. Oil upper camshaft bearing seats. Install camshafts in upper

cylinder head section, using Holder (5453) at front and Locking Tool
(5452) at rear to secure camshafts. See Fig. 7.
Fig. 7: Using Locking Tool (5452) To Secure Camshafts
Courtesy of Volvo Cars of North America.
3) Install upper cylinder head. Tighten against lower section
using 2 Press Tools (5454). Tighten retaining bolts to 13 ft. lbs. (17
N.m), starting from inside and working outward. Remove 2 press tools.
4) Using Drift (5449), install camshaft front seals. Install
camshaft pulleys and align timing marks. See Fig. 8. Tighten each
pulley with 2 bolts, just until bolts are in contact with pulleys.

Fig. 8: Aligning Camshaft & Crankshaft Timing Marks
Courtesy of Volvo Cars of North America.
5) Remove upper timing belt cover. Install belt tensioner and
tighten bolts to 18 ft. lbs. (25 N.m). Place timing belt over camshaft
pulleys, around coolant pump, and press over tensioner pulley. Loosen
camshaft pulley bolts and remove tensioner locking pin.
6) Install third camshaft pulley bolt. Hold camshaft pulleys
still and tighten bolts alternately to 15 ft. lbs. (20 N.m). Install
inner timing belt cover bolt. Install upper timing belt cover. On both
engines, remove crankshaft locking tool and install protective plug.
Install starter. Remove camshaft locking tool. Install upper
transmission cover.
7) Turn crankshaft through 2 revolutions. Ensure timing marks
on crankshaft and camshaft pulleys are correctly aligned. See Fig. 8.
Install outer timing belt cover. On both engines, use D rift (5450),
and install right rear camshaft seal. See Fig. 9. Install torque arm

and switch brackets, distributor rotor and ignition lead clip. Install
camshaft position sensor and shutter, spark plugs, distributor cap and
wires, and air cleaner housing with hoses and connectors. Install
exhaust manifold. See EXHAUST MANIFOLD under REMOVAL & INSTALLATION.
8) Install intake pipe and cooling fan. Install fuel
distribution manifold. Install 2 engine ground leads. Install exhaust
pipe and splash guard under engine. Fill engine with oil and coolant.
Start and run engine until it reaches normal operating temperature.
Check for leaks.
Fig. 9: Installing Seal Using Drift (5450)
Courtesy of Volvo Cars of North America.
CRANKSHAFT FRONT SEAL
Removal
1) Remove spark plug cover and 2 fuel line clips. Remove
expansion tank and place it on top of engine. Remove front timing belt
cover and auxiliary drive belt. Remove right front wheel and release
wheel arch liner to gain access to vibration damper. Remove vibration
damper guard. Turn crankshaft clockwise until all timing marks are
aligned. See Fig. 8.
2) Remove tensioner upper mounting bolt and loosen tensioner
lower bolt. Twist tensioner to free pulley. Remove lower bolt,
tensioner, upper timing belt cover and belt. Remove vibration damper.
Attach Counterhold (5433) to damper to prevent it from turning.
3) Finger tighten 2 vibration damper bolts in crankshaft belt
pulley threads are far as possible. Attach puller to crankshaft belt
pulley to puller arms act on bolts, not on pulley. See Fig. 10. Remove

crankshaft belt pulley. Remove oil seal with a screwdriver.
Fig. 10: Removing Crankshaft Belt Pulley
Courtesy of Volvo Cars of North America.
Installation
1) Clean seat and install new greased seal. Press in seal
using Drift (5455) and crankshaft center nut. Install timing belt
tensioner and tighten bolts to 18 ft. lbs. (25 N.m), plus an
additional 30 degrees. Install timing belt tensioner locking pin.
Place timing belt around crankshaft pulley and right idler pulley,
over camshaft pulleys, around coolant pump, and press over tensioner
pulley.
2) Remove timing belt tensioner locking pin. Install
vibration damper. Using counterhold to keep it from turning, tighten
vibration damper center nut to 133 ft. lbs. (180 N.m). Remove
counterhold and tighten remaining bolts to 18 ft. lbs. (25 N.m).
Install upper timing belt cover. Turn crankshaft 2 revolutions
clockwise to ensure timing marks on crankshaft and camshaft pulleys

are aligned. Install spark plug cover.
3) Install vibration damper guard, front timing belt cover,
auxiliary drive belt, 2 fuel pipe clips, expansion tank, wheel arch
liner and wheel. Fill cooling system with coolant. Check oil level.
Start engine and check for leaks.
TIMING BELT
Removal
1) Remove spark plug cover and 2 fuel line clips. Lift out
expansion tank and place on top of engine. Remove front timing belt
cover. Remove auxiliary drive belt. Remove right front wheel and
release wheel arch liner to gain access to vibration damper. Remove
vibration damper guard. Turn crankshaft clockwise until all timing
marks are aligned. See Fig. 8.
2) Remove tensioner upper mounting bolt and loosen tensioner
lower bolt. Twist tensioner to free pulley. Remove lower bolt,
tensioner, upper timing belt cover and belt.
3) Remove tensioner upper mounting bolt and loosen lower
mounting bolt. Twist tensioner to free plunger/pulley. Remove lower
bolt, tensioner and belt.
CAUTION: DO NOT turn crankshaft or camshafts while belt is removed.
Inspection
1) Spin tensioner and idler pulleys and listen for bearing
noise. See Fig. 11.
2) Ensure pulley surfaces in contact with belt are clean and
smooth. Check tensioner pulley arm and idler pulley mountings, and
tighten bolts as necessary. See TORQUE SPECIFICATIONS. Check tensioner
for signs of leakage, no resistance when depressed, or a plunger that
cannot be depressed.
Fig. 11: Checking Tensioner & Idler Pulleys
Courtesy of Volvo Cars of North America.
Installation
1) Compress tensioner and tighten center nut. Wait until

compression has taken place and insert a 2 mm locking pin in plunger.
Install tensioner and tighten mounting bolts to 18 ft. lbs. (25 N.m).
Place timing belt around crankshaft pulley and right idler. Place belt
over camshaft pulleys. Position belt around water pump and press over
tensioner pulley.
2) Remove tensioner locking pin. To complete installation,
reverse removal procedure. Turn crankshaft 2 revolutions to ensure
timing marks on crankshaft and camshaft pulleys are aligned. See
Fig. 8.
CAMSHAFTS
Removal
For camshaft removal and installation, see CYLINDER HEAD
under REMOVAL & INSTALLATION.
FRONT & REAR CAMSHAFT OIL SEALS
Removal
1) Disconnect negative battery cable. Remove spark plug cover
and 2 fuel line clips. Lift expansion tank and place on top of engine.
Remove front timing belt cover and right front wheel. Loosen right
wheel arch lining to access vibration damper.
2) On both engines, remove timing belt. See TIMING BELT. Use
Counterhold (5199) to hold camshaft stationary. See Fig. 12. Remove
camshaft pulleys. Using a screwdriver, carefully pry out front seals.
Clean seats and check shafts for wear.
Installation
Using Drift (5449), install new front seal.
Fig. 12: Using Counterhold (5199) To Hold Camshaft Stationary
Courtesy of Volvo Cars of North America.
Removal
Remove air cleaner housing with hoses and connectors. Remove

distributor cover, rotor and ignition lead clip. Remove camshaft
position sensor housing and shutter.
Installation
Using Drift (5450), install new greased rear seal. See Fig. 9
. Seal is located on same plane as edge of inside shoulder. To
complete installation, reverse removal procedure.
REAR CRANKSHAFT OIL SEAL
NOTE: For manual transmission removal procedures, see
TRANSMISSION REMOVAL & INSTALLATION - M/T article in MANUAL
TRANS SERVICE section . Automatic transmission removal
information is not available at time of publication.
Removal & Installation
Install Gear Sector (5112) to keep crankshaft from turning.
Remove flywheel. Pry out seal with screwdriver. Tap in new greased
seal using Drift (5430) and Installer (1801). Install flywheel. Apply
Loctite to new bolts and tighten to 33 ft. lbs. (45 N.m), plus an
additional 50 degrees.
WATER PUMP
Removal
Remove expansion tank cap and drain coolant. Remove timing
belt. See TIMING BELT. Remove bolts holding water pump to engine
block. See Fig. 13. Remove water pump.
Installation
Remove old gasket from cylinder block. Install water pump.
Tighten mounting bolts alternately to 15 ft. lbs. (20 N.m). Install
timing belt. See TIMING BELT. Fill engine with coolant. Start engine
and check for leaks.
Fig. 13: Removing Water Pump
Courtesy of Volvo Cars of North America.
OIL PUMP

Removal
1) Remove spark plug cover and 2 fuel line clips. Remove
expansion tank and place it on top of engine. Remove front timing belt
cover and auxiliary drive belt. Remove right front wheel and release
wheel arch liner to gain access to vibration damper. Remove vibration
damper guard. Turn crankshaft clockwise until all timing marks are
aligned. See Fig. 8.
2) Remove tensioner upper mounting bolt and loosen tensioner
lower bolt. Twist tensioner to free pulley. Remove lower bolt,
tensioner, upper timing belt cover and belt. Remove vibration damper.
Attach Counterhold (5433) to damper to prevent it from turning.
3) Finger tighten 2 vibration damper bolts in crankshaft belt
pulley threads are far as possible. Attach a puller to crankshaft belt
pulley to puller arms act on bolts, not on pulley. Remove crankshaft
belt pulley. Remove 4 oil pump mounting bolts. See Fig. 14. Pry off
oil pump with a screwdriver inserted behind lugs.
Inspection
1) Check all oil pump components for damage and wear. Closely
inspect crescent between suction and delivery sides. If any defective
components are found, replace entire pump assembly.
2) Ensure relief valve spring length is within specification.
See OIL PUMP SPECIFICATIONS table. Using a feeler gauge, check outer
rotor-to-housing clearance. If clearance is not within specification,
replace oil pump assembly.
OIL PUMP SPECIFICATIONS TABLE
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Component Clearance
Outer Rotor-To-Housing .................... .014" (.35 mm)
Relief Valve Spring
Free Length .......................... 3.233" (82.13 mm)
Lbs. @ In. (N @ mm)
Pressure
Valve Closed .................... 12 @ 2.21 (52 @ 56.1)
Valve Open ...................... 19 @ 1.57 (85 @ 39.9)
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Installation
1) Using NEW gasket and Drift (5455), install oil pump. Pull
in pump using crankshaft center nut. Tighten oil pump bolts
alternately to 84 INCH lbs. (10 N.m). Install timing belt tensioner
and tighten bolts to 18 ft. lbs. (25 N.m). Install timing belt
tensioner locking pin. Place timing belt around crankshaft pulley and
right idler pulley, over camshaft pulleys, around coolant pump, and
press over tensioner pulley.
2) Remove timing belt tensioner locking pin. Install
vibration damper. Using counterhold to keep it from turning, tighten
vibration damper center nut to 133 ft. lbs. (180 N.m). Remove
counterhold and tighten bolts to 18 ft. lbs. (25 N.m). Install upper
timing belt cover. Turn crankshaft 2 revolutions clockwise to ensure
timing marks on crankshaft and camshaft pulleys are aligned. Install
spark plug cover.
3) Install vibration damper guard, front timing belt cover,
auxiliary drive belt, 2 fuel pipe clips, expansion tank, wheel arch
liner and wheel. Fill cooling system with coolant. Check oil level.
Start engine and check for leaks.

Fig. 14: Removing Oil Pump Retaining Bolts
Courtesy of Volvo Cars of North America.
OVERHAUL
CYLINDER HEAD
Cylinder Head
Ensure all mating surfaces are clean. Measure cylinder head
warpage. If longitudinal warpage is less than .020" (.50 mm), or
lateral warpage is less than .008" (.20 mm), resurfacing is not
required. If warpage is greater than specifications, resurface
cylinder head. Maximum resurface limit is .011" (.30 mm).
Valve Springs
Measure valve spring free length. Replace any spring shorter
than minimum free length specification. See VALVE SPRING FREE LENGTH
in VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS.
Valve Stem Oil Seals
Place new seal on valve stem. Remove protective sleeve. Using
Drift (5379), push seal onto stem by hand only as far as possible. Do
not use a hammer to install valve stem seals.
Valve Guides
Three replacement valve guides are available. Standard valve
guide has no grooves at top and is .472" (12 mm) in diameter. First
oversize valve guide has one groove at top and is .476" (12.1 mm) in
diameter. Second oversize valve guide has 2 grooves at top and is .
480" (12.2 mm) in diameter.

Valve Seat
Replacement procedure is not available at time of
publication.
Valves
Check valve for wear or burning. Measure valve dimensions
after refacing. Replace any valve that does not meet specification.
See VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS. Measure
valve stem installed height after refinishing valve or seat. See
CYLINDER HEAD table under ENGINE SPECIFICATIONS.
Valve Seat Correction Angles
Ensure valve seat angles are within specification. For face
angle, see VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS.
Upper relief angle is 15 degrees. Lower relief angle is 70 degrees.
CYLINDER BLOCK ASSEMBLY
Piston & Rod Assembly
1) Carefully press out pistons and connecting rods by hand.
Mark pistons and connecting rods for reassembly reference. Carefully
pry out piston pin locking circlip with a screwdriver. Clean and
inspect all components for damage. Check connecting rod cap bolt
length. Maximum length is 2.16" (55 mm).
2) Check piston pin fit in connecting rod. No play should be
present as pin should slide through hole with gentle thumb pressure.
Replace piston as necessary. Check piston pin fit in connecting rod in
same manner. If pin fails to slide through hole without play when
pressed with thumb, install NEW connecting rod bushing. Ensure
numerical designation on connecting rod faces toward starter motor
side of block.
Fitting Pistons
Install pistons using Piston Ring Compressor (115 8281).
Ensure arrow on top of piston faces toward timing belt end of engine.
Piston Rings
1) Using Piston Ring Pliers (998 5424), remove piston rings.
Remove carbon deposits. Scrape ring grooves clean. Check pistons for
damage and repair as necessary. Check piston ring side play and piston
diameter. See PISTONS, PINS & RINGS under ENGINE SPECIFICATIONS.
2) Using Piston Ring Pliers (998 5424), install piston rings
so gaps are 120 degrees apart. Install upper compression and oil
scraper rings with text facing upward. Install lower compression ring
with groove facing downward.
Crankshaft & Main Bearings
1) Remove engine from vehicle. See ENGINE under REMOVAL &
INSTALLATION. Remove cylinder head. See CYLINDER HEAD under REMOVAL &
INSTALLATION. Place engine upside down. Remove oil filter. Disconnect
flame trap return line. Remove oil pan. Remove all oil passage "O"
rings. Remove oil pump suction pipe and "O" ring.
2) Rotate crankshaft so all piston connecting rod bolts are
accessible for removal without rotating crankshaft again. Starting at
sides and working toward center, remove intermediate section bolts.
Loosen intermediate section by carefully tapping with a plastic
mallet. Remove crankshaft rear seal.
CAUTION: DO NOT not allow crankshaft to rotate.
3) Check identification markings on connecting rods and
connecting rod caps. Mark components for reassembly reference as
necessary. Remove connecting rod caps. Lift crankshaft out of block

and support on "V" blocks on 2 outermost main journals. Remove main
bearings from block. Mark position of thrust bearing for reassembly
reference.
4) Use micrometer and measure crankshaft out-of-round and
taper. Ensure to measure at several points around circumference and
along length. Use Dial Gauge (9684) and Magnetic Stand (9696) to check
straightness of crankshaft. See ENGINE SPECIFICATIONS.
5) Check classification markings on cylinder block and
crankshaft before installing crankshaft main bearings. Main bearings
are color-coded Yellow, Blue and Red. Torque intermediate section
bolts in 5 stages. Each stage should be completely torqued before
beginning another stage. See Fig. 15. See TORQUE SPECIFICATIONS. After
main bearings are installed and intermediate section is tightened,
check crankshaft end play.
Fig. 15: Intermediate Section Tightening Sequence (Typical)
Courtesy of Volvo Cars of North America.
Thrust Bearing
Ensure thrust bearing is marked for reassembly reference.
Cylinder Block
1) Wipe bores clean and visually check. Measure bores using
Dial Gauge (9639), Micrometer (9704), and micrometer stand. Use dial
gauge and check for maximum wear at right angles to center line of
engine immediately below top dead center. Check for minimum wear in
direction of center line at bottom dead center.
2) Each cylinder is identified by a classification mark (C,
D, E, or G) punched in rear of block. Oversize bores can be indicated
by OS1 or OS2. See CYLINDER BLOCK under ENGINE SPECIFICATIONS.
ENGINE OILING

ENGINE LUBRICATION SYSTEM
Crankcase Capacity
Oil capacity is 4.4 qts. (5.3L) with filter. On turbocharged
engines, add .95 qt. (.9L) if turbo oil cooler is drained.
Oil Pressure
Oil pressure is 14 psi (.10 bar) at idle and 43 psi (.30 bar)
at 3000 RPM. See Fig. 16.
Fig. 16: Engine Oil Schematic
Courtesy of Volvo Cars of North America.
TORQUE SPECIFICATIONS