GMC G User manual

Light Duty Truck
R,V,G,P Models j

——
......
—
........
.............

1988
LIGHT DUTY
TRUCK
SERVICE
MANUAL
R/V, P-TRUCK
AND G-VAN
MODELS
The Table of Contents on th s page nd
cates the sect ons covered n th s manual.
At the beg nnng of each ndvdual sect on
s a Table of Contents whch g ves the page
number on wh ch each major subject
begns.
When reference s made n ths manual
to a brand name, number, or specf c tool,
an equ valent product may be used n place
of the recommended tem.
All nformat on, llustrat ons, and spec f 
cat ons conta ned n th s Manual are based
on the latest product nformat on ava lable
at the t me of publ cat on approval. The
rght s reserved to make changes at any
t me w thout not ce.
All R ghts Reserved
X-8832
Pr nted n U.S.A.
© 1987 General Motors Corporat on August, 1987
SEC NAME
0GENERAL INFORMATION
0A General Information
OB Maintenance and Lubrication
1HEATING AND AIR CONDITIONING
1A Heating and Ventilation
1B Air onditioning
2FRAME AND SHEET METAL
2A Frame and Bumpers
2B Sheet Metal
3 STEERING, SUSPENSION, WHEELS AND TIRES
3A Front End Alignment
3B1 Steering Linkage
3B3 Power Steering
3B4 Steering olumn
3 Front Suspension and Axle
3D Rear Suspension
3E Wheels and Tires
4 PROPELLER SHAFT AND AXLES
4A Propeller Shaft
4B1 Rear Axle
4 Front Driving Axle
5 BRAKES
5A Hydraulic Brakes
5A1 Hydraulic Brake Booster Systems
5A2 Hydraulic Foundation Brakes
6ENGINE
6A Engine, Driveability and Diagnosis
6A3 4.3 Liter V6
6A4 Small Block
6A5 7.4 Liter V8
6A6 6.2 Liter Diesel
6A7 4.8 Liter L6
6B1 Engine ooling
6B2 Radiator
6 Fuel System
6 1 arburetors
6 2 Diesel Fuel Injection
6D Engine Electrical
6E Emissions
6E1 arburetor Emissions
6E2 Diesel Emissions
6F Exhaust
6H Vacuum Pump
7 TRANSMISSION AND CLUTCH
7A Automatic Transmission
7B Manual Transmission
7 lutch
7D1 205 Transfer ase
7D2 208 Transfer ase
8 ELECTRICAL
8A ab Electrical
8B hassis Electrical
8 Instrument Panel and Gages
9ACCESSORIES
10 BODY
10A1 Doors
10A2 Seats
10A3 Glass
10A4 Interior Trim
10A5 End Gate
10B ab And Body Maintenance
INDEX

He know
quality part
make a difference
even on
imple job .
Mr. Goodwrench wants you to have the r ght parts for
your truck—whether you see h m for servce or whether
you do the work yourself.
That’s why Mr. Goodwrench wants to have a good
stock of genu ne GM Parts ava lable. Everyth ng from
exclus ve GM Goodwrench replacement eng nes and
transm ss ons to GM Goodwrench Motor O l that meets
or exceeds all spec f cat ons for General Motors cars
or l ght trucks. And Mr. Goodwrench has a complete
l ne of GM chem cals for f ne care of your GM veh cle.
Plus accessor es to add conven ence—
or just a l ttle extra style.
B-05884
So keep that great GM feel ng w th genu ne GM parts
at part c pat ng ndependent Mr. Goodwrench dealers
sell ng Chevrolets, Pont acs, Oldsmob les, Bu cks,
Cad llacs, GMC and Chevy Trucks.
SHU GM QUALITY
WIB SERVICE PARTS H
M N HA L MOTOR* CORPORATION

OA-1
SECTION 0
GENERAL INFORMATION
CONTENTS
SUBJECT PAGE
General Informat on....................................................................................................................................................OA-1
Ma ntenance and Lubr cat on....................................................................................................................................OB-1
SECTION OA
GENERAL INFORMATION
CONTENTS
SUBJECT PAGE
General Informat on..................................................................................................................................................OA- 1
Serv ce Parts Ident f cat on Label........................................................................................................................OA- 1
Vehcle Ident f cat on Number...............................................................................................................................OA- 2
Cert f cat on Label.................................................................................................................................................OA- 2
Model Reference....................................................................................................................................................OA- 3
Eng ne Ident f cat on Number...............................................................................................................................OA- 3
Veh cle L ft ng Procedures....................................................................................................................................OA- 3
Metr c Fasteners....................................................................................................................................................OA-15
Fastener Strength Ident f cat on...........................................................................................................................OA-15
Preva l ng Torque Fasteners................................................................................................................................ OA-16
S x Lobed Socket Head Fasteners.......................................................................................................................OA-16
Ant corros on Treatment....................................................................................................................................... OA-17
Graph c Symbols...................................................................................................................................................OA-17
Electrostat c D scharge......................................................................................................................................... OA-17
Common Abbrev at ons........................................................................................................................................ OA-19
RPO L st ng (Regular Product on Opt on)..............................................................................................................OA-22
SERVICE PARTS
IDENTIFICATION LABEL
The Truck Service Parts Identification Label is provided
on all models (figure 1). It is located on the inside of the
glove box door (or on an inner body panel for Forward
ontrol models). The Label lists the VIN (Vehicle Identifica
tion Number), wheelbase, paint information and all Produc
tion options or Special Equipment on the vehicle when it
was shipped from the factory. ALWAYS REFER TO THIS
INFORMATION WHEN ORDERING PARTS.
2
1. Vehicle Identification Number (VIN)
2. Wheel Base
3. Model Designation
4. RPO and/or SEO Options
5. Order Number
6. Exterior olor
7. Paint Technology L00300
F gure 1 — Serv ce Parts Ident f cat on Label

OA-2 GENERAL INFORMATION
VEHICLE IDENTIFICATION NUMBER
The VIN is the legal identifier of the vehicle. On all
models except Forward ontrol, it is located on a plate
which is attached to the left top of the instrument panel and
can be seen through the windshield from the outside of the
vehicle (figure 2). On Forward ontrol models, the plate is
on the dash and toe panel. To find the manufacturer, model
and chassis type, engine type, GVW range, model year,
plant code, and sequential number, refer to figure 3.
F-00687
F gure 2 — VIN Locat on
CERTIFICATION LABEL
The ertification Label shows the GVWR, and the front
and rear GAWRs, and the Payload Rating for the vehicle
(figure 4).
Gross Vehicle Weight (GVW) is the weight of the origi
nally equipped vehicle and all items added to it after it has
left the factory. This would include bodies, winches, booms,
etc.; the driver and all occupants; and the load the vehicle is
carrying. The GVW must not exceed the GVWR. Also, the
front and rear gross axle weights must not exceed the front
and rear GAWRs.
The Payload Rating shown on the label is the maximum
allowable cargo load (including the weight of the driver and
all occupants) that the vehicle can carry based on all factory
Nat on of Or g n
1 = U S. Bu lt
2 » Canad an Bu lt
3 - Mex can Bu lt
Manufacturers
G = General Motors
Code Make
A' hevrolet Bus"
Bhevrolet Incom plete
hevrolet Truck
DGM Incom plete
HGM of anada Bus
JGM Bus
KGM MPV
Nhevrolet MPV
TGM Truck
* Van with 4th Seat
GVWR/BP.AKE SYSTEM
Code GVWR Range Brake System
B3001-4000 Hydraul c
C4001-5000 Hydraul c
D5001-6000 Hydraul c
E6001-7000 Hydraul c
F7001-8000 Hydraul c
G8001-9000 Hydraul c
H9001-10,000 Hydraul c
J 10,001-14,000 Hydraul c
K14,001-16,000 Hydraul c
Code Ser es
1'h Ton
2% Ton
31 Ton
%Product on Sequence Number J
Code Body Type
0hassis Only
1Hi- ube/ utaway Van
2Forward ontrol
3 Four-Door ab
4Two-Door ab
5Van
6 Suburban
7M otor Home hassis
8U tility (Jimmy/Blazer)
9Extended ab
Code Year
J1988
L ne and Chass s Type
Chass s
Code L ne Type
C Convent onal Cab 4 x 2
R Convent onal Cab 4 x 2
DM l tary Truck 4x4
K Convent onal Cab 4 x 4
VConvent onal Cab 4x4
GVan 4 x 2
PForward Control 4x2
SSm Convent onal Cab4 x 2
T Sm Convent onal Cab4 x 4
MSm Van 4 x 2
Assembly Plant
BBaltimore, MD
ePontiac East. Ml
F Flint, Ml
jJanesville, Wl
St. Louis, MO
VPontiac, Ml
zFort Wayne, IN
0Pontiac, Ml
1Oshawa, ON
2 Moraine, OH
3Detroit, Ml
4 Scarborough. ON
7Lordstown, OH
8Shreveport, LA
Eng ne Type and Make
Code Producer Type RPO
DDA 6.2L V8 Diesel LH6
E P -North 2.5L L4 TBI LN8
HP 5.0L V8 TBI L03
J DDA 6.2L V8 Diesel LL4
KP 5.7L V8 TBI L05
MP 5.7L V8 4 BBL LT9
NP 7.4L V8 TBI L19
RP 2.8L V8 TBI LL2
TP 4.8L L6 1 BBL L25
WP 7.4L V8 4 BBL LE8
zP 4.3L V6 TBI LB4 F-04181
F gure 3 — Veh cle dent f cat on Number

GENERAL INFORMATION OA-3
installed equipment on the vehicle. The Payload Rating is
reduced if any accessories or other equipment is added to
the vehicle after final date of manufacture. The weight of
these items should be determined and deducted from the
Payload Rating.
The vehicle may also have a G WR (Gross ombina
tion Weight Rating). The G W (Gross ombination
Weight) is the total weight of the loaded tow vehicle (includ
ing passengers) and a loaded trailer.
The tires on the vehicle must be the proper size and
properly inflated for the load which you are carrying. The
vehicle ertification Label shows the originally equipped
tire size and recommended inflation pressures. For more
information on tires, refer to WHEELS AND TIRES (Sec.
3E). MODEL REFERENCE
Refer to figures 5 and 6 to determine the vehicle model.
For R/V models, an “R” is a two-wheel drive vehicle and a
“V” is a four-wheel drive vehicle.
ENGINE IDENTIFICATION NUMBER
Refer to figure 7 to determine the location of the engine
I.D. number. Refer to figure 8 for engine, transmission, and
transfer case applications.
VEHICLE LIFTING PROCEDURES
CAUTION: To help avo d personal njury when a
veh cle s on a ho st,prov de add t onal support
for the veh cle at the oppos te end from wh ch
componets are be ng removed. Th s w ll reduce
the poss b l ty of the veh cle fall ng off the ho st.
For lifting a vehicle, various lift points are recommended.
Refer to figures 9 through 16.
When lifting the R vehicle with a hoist, the rear hoist
pads should be positioned under the rear spring front
hangers.
When lifting the V vehicle with a hoist, the front hoist
pads should be positioned under the frame, at the front
body mount. The rear hoist pads should be positioned
under the rear spring front hangers.
When lifting the front of the V vehicle with a floor jack,
position the jack pad at the center of the axle, not under the
front differential.
When lifting the P vehicle with a hoist, the rear hoist
pads should be positioned under the frame and inboard of
the rear spring front hangers.
When lifting the G vehicle with a hoist, the rear hoist
pads should be positioned under the rear spring forward
hangers.
Any time a vehicle is lifted with a vehicle jack or a floor
jack, the wheels at the opposite end of the lifted end should
be chocked. Also, jack stands should be used to provide
support. When supporting the vehicle with jack stands, the
jack stands should be placed under the frame, the front
suspension crossmember or the axle.
When removing major components of the vehicle while
the vehicle is on a hoist, the vehicle frame should be
chained to the hoist pads in order to prevent tip-off.
NOTICE: When jacking or lifting a vehicle, be
certain that the lift pads do not contact the cata
lytic converter, brake lines, brake cables, or fuel
lines. Such contact may result in damage or
unsatisfactory vehicle performance.
Pickup, Regular ab R-V MODELS hassis - ab, Bonus/ rew ab
Pickup, Bonus/ rew ab
hassis - ab, Regular ab
Surburban
L00301
Utility Vehicle
Jimmy (Blazer)
F gure 5 — R/V Models

OA-4 GENERAL INFORMATION
G VAN MODELS
RALLY (SPORTVAN) VANDURA (CHEVY VAN)
CUTAWAY VAN MAGNAVAN (HI-CUBE VAN)
P MODELS
VALUE VAN (STEP VAN)
(ALUMINUM) MOTOR HOME CHASSIS
VALUE VAN (STEP VAN)
(STEEL) FORWARD CONTROL CHASSIS
B-09178
F gure 6 — G-Van and P-Models

GENERAL INFORMATION OA-5
6.2L
DIESEL
V8 GAS
1. Thermostat over
2. Engine I.D.
3. Left ylinder Head
4. Water Pump Inlet
5. VIN Location
DIESEL
L00309
F gure 7 — Eng ne I.D. Locat on

OA-6 GENERAL INFORMATION
Model Eng ne* Transm ss on* Transfer
Case
Base Opt on Base Opt on
R109 (06) 5.7L V8 (L05) 6.2L V8 (LH6) 4-Spd. Auto. (MD8) — —
R209 (06) 5.7L V8 (L05) 6.2L V8 (LL4), 7.4L V8 (L19) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) —
R209 (43) 4.8L L6 (L25) 5.7L V8 (L05), 6.2L V8 (LL4),
7.4L V8 (L19) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) —
R309 (43), 310 (03),
314 (03) 4.8L L6 (L25) 5.7L V8 (L05), 5.7L V8 (LT9), 6.2L V8 (LL4), 7.4L V8 (LE8),
7.4L V8 (L19)
4-Spd. Man. (M20) 3-Spd. Auto. (M40)
V105 (16), 109 (06) 5.7L V8 (L05) 6.2L V8 (LH6) 4-Spd. Man. (M20) 4-Spd. Auto. (MD8) 208
V209 (06) 5.7L V8 (L05) 6.2L V8 (LL4) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) 208
V309 (03) 5.7L V8 (L05) 6.2L V8 (LL4), 7.4L V8 (L19) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) 205
V309 (43) 4.8L L6 (L25) 5.7L V8 (L05), 5.7L V8 (LT9),
6.2L V8 (LL4), 7.4L V8 (LE8),
7.4L V8 (L19)
4-Spd. Man. (M20) 3-Spd. Auto. (M40) 205
V310 (03), 314 (03) 4.8L L6 (L25) 5.7L V8 (L05), 6.2L V8 (LL4),
7.4L V8 (LE8), 7.4L V8 (L19) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) 205
G110 (05) 4.3L L6 (LB4) 5.0L V8 (L03), 5.7L V8 (L05) 4-Spd. Man. (MY6) 3-Spd. Auto. (M40),
4-Spd. Auto. (MD8) —
G110 (06) 4.3L L6 (LB4) 5.0L V8 (L03) 4-Spd. Man. (MY6) 4-Spd. Auto. (MD8) —
G113 (05) 4.3L L6 (LB4) 5.0L V8 (L03), 5.7L V8 (L05) 4-Spd. Man. (MY6) 3-Spd. Auto. (M40),
4-Spd. Auto. (MD8) —
G113 (06) 4.3L L6 (LB4) 5.0L V8 (L03), 5.7L V8 (L05) 4-Spd. Man. (MY6) 4-Spd. Auto. (MD8) —
G210 (05) 4.3L L6 (LB4) 5.0L V8 (L03), 6.2L V8 (LH6) 4-Spd. Man. (MY6) 3-Spd. Auto. (M40),
4-Spd. Auto. (MD8) —
G213 (05) 4.3L L6 (LB4) 5.0L V8 (L03), 5.7L V8 (L05),
6.2L V8 (LH6) 4-Spd. Man. (MY6) 3-Spd. Auto. (M40),
4-Spd. Auto. (MD8) —
G213 (06) 4.3L L6 (LB4) 5.0L V8 (L03), 5.7L V8 (L05),
6.2L V8 (LH6) 4-Spd. Man. (MY6) 4-Spd. Auto. (MD8) —
G313 (05) L.D.,
313 (06) 4.3L L6 (LB4) —4-Spd. Auto. (MD8) ——
G313 (05) H.D.,
313 (03), 313 (32) 5.7L V8 (L05) 6.2L V8 (LL4), 7.4L V8 (L19) 3-Spd. Auto. (M40) ——
G316 (03), 316 (32) 5.7L V8 (L05) 5.7L V8 (LT9), 6.2L V8 (LL4),
7.4L V8 (L19) 3-Spd. Auto. (M40) ——
P208 (42), 210 (42),
308 (42), 310 (42) 4.8L L6 (L25) 5.7L V8 (L05), 6.2L V8 (LL4) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) —
P311 (32) 7.4 V8 (LE8) 6.2L V8 (LL4) 3-Spd. Auto. (M40) — —
P314 (42) 4.8L L6 (L25) 5.7L V8 (L05), 6.2L V8 (LL4) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) —
P314 (32) 7.4L V8 (LE8) 6.2L V8 (LL4) 3-Spd. Man. (M40) ——
P318 (42) 4.8L L6 (L25) 5.7L V8 (LT9), 6.2L V8 (LL4) 4-Spd. Man. (M20) 3-Spd. Auto. (M40) —
P318 (32), 320 (32) 7.4L V8 (LE8) —3-Spd. Auto. (M40) ——
•Refer to the RPO Listing in this section if additional descriptions are needed. GMTB-0302-2L
F gure 8 — Eng ne, Transm ss on, Transfer Case Appl cat on Chart

GENERAL INFORMATION OA-7
A. Lower control arm; inboard of the lower ball joint.
B. Front suspension crossmember; center.
. Frame at toward body mount.
D. Rear spring forward hanger.
E. Rear axle; between the spring and brake backing plate.
F. Differential case; center.
Vehicle Jack or Floor Jack
Floor Jack
Hoist
B-07500
F gure 9 — Chass s L ft Po nts — R-Model

OA-8 GENERAL INFORMATION
Rear, Unders de
Rear, R ght S de L00474
F gure 10 — L ft ng the Veh cle — R-Model

GENERAL INFORMATION OA-9
©Vehicle Jack
or Floor Jack
/ \ Vehicle Jack
Q Floor Jack
"1 Hoist
■■■ Two olumn Hoist
Two olumn Hoist
B-07501
A.
B.
.
D.
E.
F.
G.
Front axle; close to wheel as possible
Front axle; at stabilizer bar mount.
Front axle; at center.
Frame; at front body mount.
Rear spring at front mount.
Rear axle; at spring mount.
Rear axle, at center of differential.
F gure 11 — Chass s L ft Po nt — V-Model

0A-10 GENERAL INFORMATION
L00476
F gure 12 — L ft ng the Veh cle — V-Model

GENERAL INFORMATION OA-11
A. Lower control arm; inboard of the lower ball joint.
B. Front suspension crossmember; center.
. Frame; at inward bend.
D. Rear spring; at forward spring hanger.
E. Axle; at spring mount.
F. Differential; at center.
@ Vehicle Jack or Floor Jack
o F,°or jack
jHH Hoist B-07627
F gure 13 — Chass s L ft Po nts — G-Model

OA-12 GENERAL INFORMATION
Rear, R ght S de
L00477
Front, Unders de
Rear, Unders de
Front, R ght S de
F gure 14 — L ft ng the Veh cle —■ G-Model

GENERAL INFORMATION OA-13
A. Front axle; at the spring mount.
B. Frame; at the crossmember, just behind the
. Frame; at the crossmember.
D. Rear axle; at the spring mount.
E. Rear axle; at the differential.
spring mount.
O Floor Jack
Hoist
B-07628
F gure 15 — Chass s L ft Po nts — P-Model

OA-14 GENERAL INFORMATION
Front, Left S de
Front, Left Unders de Rear, Unders de L00473
F gure 16 — L ft ng the Veh cle — P-Model

GENERAL INFORMATION OA-15
METRIC FASTENERS
Models are primarily dimensioned in the metric system.
Many fasteners are metric and are very close in dimension
to well-known customary fasteners in the inch system. It is
most important that replacement fasteners be of the correct
nominal diameter, thread pitch and strength.
Original equipment metric fasteners (except “beauty”
bolts, such as exposed bumper bolts, and cross recess
head screws) are identified by a number marking indicating
the strength of the material in the fastener as outlined later.
Metric cross recess screws are identified by a Posidriv or
Type 1A shown in figure 17. Either a Phillips head or Type
1A cross recess screwdriver can be used in Posidriv recess
screw heads, but Type 1A cross recess screwdrivers will
perform better.
NOTICE: Most metric fasteners have a blue color
coating. However, this should not be used as
positive identification as some fasteners are not
color coated.
General Motors Engineering Standards, along with
other North American Industries, have adopted a portion of
the standard metric fastener sizes defined by ISO (Interna
tional Standards Organization). This was done to reduce
the number of fastener sizes used and yet retain the best
strength qualities in each thread size. For example, the
customary 1/4-20 and 1/4-28 screws are replaced by the
metric M6.0X1 screw which has nearly the same diameter
and has 25.4 threads per inch. The thread pitch is in
between the customary coarse and fine thread pitches.
Metric and customary thread notation differ slightly. The
difference is shown in figure 18.
1. ustomary Bolt—1/4-20
2. Metric Bolt—M6.0x1
A. 1/4-inch
B. 6 mm
. 20 Threads Per Inch
D. 1 Thread Per Millimeter
(25.4 Threads Per Inch) F-00705
F gure 18 — Thread Notat on
FASTENER STRENGTH
IDENTIFICATION
Most commonly used metric fastener strength property
classes are 9.8 and 10.9 with the class identification
embossed on the head of each bolt. ustomary (inch)
strength classes range from grade 2 to 8 with radial line
identification embossed on each bolt head. Markings corre
spond to two lines less than the actual grade (i.e. grade 7
bolt will exhibit 5 embossed radial lines on the bolt\|iead).
Some metric nuts will be marked with single digit strength
identification numbers on the nut face. Figure 18 shows the
different strength markings.
When replacing metric fasteners, be careful to use bolts
and nuts of the same strength or greater than the original
fasteners (the same number marking or higher). It is like
wise important to select replacement fasteners of the cor
rect size. orrect replacement bolts metric fasteners
available in the aftermarket parts channels were designed
to metric standards of countries other than the United
States, and may be of a lower strength, may not have the
numbered head marking system, and may be of a different
thread pitch. The metric fasteners used on GM products are
designed to new, international standards that may not yet
be manufactured by some non-domestic bolt and nut sup
pliers. In general, except for special applications, the com
mon sizes and pitches are:
M 6.0 x 1 M 10 x 1.5
M 8 x 1.25 M 12 x 1.75
1. Grade 2 (GM 200-M)
2. Grade 5 (GM 280-M)
3. Grade 7 (GM 290-M)
4. Grade 8 (GM 300-M)
5. Manufacturer’s Identification
6. Nut Strength Identification
7. Identification Marks (Posidriv Screw Head)
7
F-00695
F gure 17 — Bolt and Nut Ident f cat on

OA-16 GENERAL INFORMATION
PREVAILING TORQUE FASTENERS
A prevailing torque nut is designed to develop an inter
ference between the nut and bolt threads. This is most
often accomplished by distortion of the top of an all-metal
nut by using a nylon patch on the threads in the middle of
the hex flat. A nylon insert may also be used as a method of
interference between nut and bolt threads (figure 19).
A prevailing torque bolt is designed to develop an inter
ference between bolt and nut threads, or the threads of a
tapped hole. This is accomplished by distorting some of the
threads or by using a nylon patch or adhesive (figure 19).
RECOMMENDATIONS FOR REUSE:
1. lean, unrusted prevailing torque nuts and bolts may
be reused as follows:
a. lean dirt and other foreign material off the nut
or bolt.
b. Inspect the nut or bolt to insure there are no
cracks, elongation, or other signs of abuse or
overtightening. (If there is any doubt, replace
with a new prevailing torque fastener of equal or
greater strength.)
c. Assemble the parts and hand start the nut or
bolt.
d. Observe that, before fastener seats, it develops
torque per the chart in figure 19 (if there is any
doubt, replace with a new prevailing torque fas
tener of equal or greater strength).
e. Tighten the fastener to the torque specified in
the appropriate section of this manual.
2. Bolts and nuts which are rusty or damaged should be
replaced with new parts of equal or greater strength.
SIX LOBED SOCKET
HEAD FASTENERS
Six lobed socket head fasteners are used in some appli
cations on vehicles covered in this manual (figure 20). The
door striker bolt is of this design.
n s n
8
6 & 6.3 8 10 12 14 16 20
4, 5 N«m 0.4 0.8 1.4 2.2 3.0 4.2 7.0
In. Lbs. 4.0 7.0 12 18 25 35 57
1,2, 3, 6,
7, 8, 9 N*m 0.4 0.6 1.2 1.6 2.4 3.4 5.6
In. Lbs. 4.0 5.0 10 14 20 28 46
B
.250 .312 .375 .437 .500 .562 .625 .750
4, 5 N*m 0.4 0.6 1.4 1.8 2.4 3.2 4.2 6.2
In. Lbs. 4.0 5.0 12 15 20 27 35 51
1, 2, 3, 6,
8, 9 N*m 0.4 0.6 1.0 1.4 1.8 2.6 3.4 5.2
In. Lbs. 4.0 5.0 9.0 12 15 22 28 43
A. Metric Sizes
B. Inch Sizes 1. Top Lock Type
2. enter Lock
3. Dry Adhesive oating
4. Out Of Round Thread
5. Deformed Thread Profile
6. Nylon Strip Or Patch
7. Nylon Washer Insert
8. Nylon Patch
9. Nylon Insert B-02406
F gure 19 — Torque Nuts and Bolts Chart