Toyota MR2 SW 1993 User manual

COOLANT REPLACEMENT
NOTICE:
•To avoid the danger of burns, do not begin work
until the engine and coolant have properly cooled
down.
•To ensure that coolant is poured in properly, per–
form the operation at a level area. Performing work
with the vehicle inclined may cause improper re–
moval of coolant or improper air removal when
pouring coolant.
•After replacing the coolant, check the water level in
the water filler and reservoir tank once or twice
within 500 km (311 miles) of driving or within one
week.
COOLANT CIRCUIT
–3S–GTE ENGINE COOLING SYSTEM
EG1–418

(c) Remove the drain cocks (engine, radiator and radiator
pipes), and drain the coolant.
(d) Close the drain plugs.
Torque:
25 N–m (250 kgf–cm, 18 ft–lbf) for engine
17 N–m (170 kgf–cm, 12 ft–lbf) for radiator pipes
(b) Remove the radiator cap.
CAUTION: To avoid the danger of being burned, do not
remove it while the engine and radiator are still hot, as
fluid and steam can be blown out under pressure.
ENGINE COOLANT DRAINAGE
1. REMOVE REAR FUEL TANK PROTECTOR
2. DRAIN ENGINE COOLANT
(a) Set the heater control lever to hot.
–3S–GTE ENGINE COOLING SYSTEM EG1–419

4. SET SERVICE HOSES
(a) Connect the service hoses to the air drain plugs of the
radiator and heater water valve.
(b) Suspend the opposite ends the front hood as shown in
the illustration.
NOTICE: Do not close–off or pinch any of the service
hoses.
ENGINE COOLANT REFILL
1. REMOVE SPARE TIRE
2. REMOVE DASH PANEL FRONT TRIM COVER
(b) Remove the seven clips.
(c) Remove the two hood lock mounting bolts, and
remove the support seal.
3. REMOVE UPPER RADIATOR SUPPORT SEAL
(a) Disconnect the hood weatherstrip.
5. FILL ENGINE COOLANT
(a) Set the heater control lever to hot.
–3S–GTE ENGINE COOLING SYSTEM
EG1–420

(c) Slowly fill the system with coolant.
Use a good brand of ethylene–glycol base coo–
lant and mix it according to the manufacturer’s
directions.
Using coolant which includes more than 50%
ethylene–glycol (but not more than 70%) is
recommended.
NOTICE:
•Do not use a alcohol type coolant.
•The coolant should be mixed with demineralized
water or distilled water.
Capacity (w/ Heater):
13.6 liters (14.4 US qts. 12.0 Imp.qts)
(d) Check that air is absent from the air drain plugs of the
radiator and heater water valve while filling the water
filler inlet to the top with coolant.
(e) Visually check that the level of coolant in the air drain
service hoses of the radiator and heater water valve
are the same as in the water filler.
NOTICE: If the water level of coolant in the air drain
service hose is clearly, air removal has been incomplete,
so check if the service hose is crushed or bent, them
perform step (c).
(b) Open the air drain plugs of the radiator or heater
water valve above three turns.
–3S–GTE ENGINE COOLING SYSTEM EG1–421

(i) Add more coolant, and repeat steps (h) and (i).
HINT: By performing steps (h) and (i), 0.2 – 0.5 liters
(0.2 – 0.5 US qts, 0.2 – 0.4 Imp. qts) can normally be
added.
(j) Check that coolant level in the water filler has not
dropped.
If the coolant level has dropped, add coolant and
repeat the steps from (g) onward.
(g) Fasten the radiator (water filler) cap to the 1 st stop
point.
NOTICE: Do not tighten the radiator cap completely (to
the 2nd stop point).
(h) Start the engine, and run at idle for approx. 3 minutes,
and stop the engine.
(f) When the coolant level in the air drain service hoses
stops dropping, close the air drain plugs of the radi–
ator and heater water valve.
(k) Completely tighten the radiator (water filler) cap.
–3S–GTE ENGINE COOLING SYSTEM
EG1–422

6. REINSTALL UPPER RADIATOR SUPPORT SEAL
(a) Temporarily install the hood lock with the RH side
bolt.
(b) Place the support seal in position.
(c) Install the hood lock with the two bolts.
(d) Install the seven clips.
(I) Fill coolant into the reservoir tank up to the ”FULL”
line.
(m) Check coolant for leaks.
7. REINSTALL SPARE TIRE
8. REINSTALL DASH PANEL FRONT TRIM COVER
9. REINSTALL REAR FUEL TANK PROTECTOR
(e) install the hood weatherstrip.
–3S–GTE ENGINE COOLING SYSTEM EG1–423