Downloaded from www.Manualslib.com manuals search engine ENGINE COOLING 6B-5
Diagnosis
Condition Possible Cause Correction
Engine overheats
Loose or broken water pump belt
Not enough coolant
Faulty thermostat
Faulty water pump
Dirty or bent radiator fins
Coolant leakage on cooling system
Defective cooling fan clutch
Plugged radiator
Faulty radiator cap
Maladjusted ignition timing
Dragging brakes
Slipping clutchAdjust or replace.
Check coolant level and add as
necessary.
Replace.
Replace.
Clean or remedy.
Repair.
Check and replace as necessary.
Check and replace radiator as
necessary.
Replace.
Check system related parts.
Adjust brake.
Adjust or replace.
Downloaded from www.Manualslib.com manuals search engine 6B-12 ENGINE COOLING
INSPECTION
1) Make sure that air bleed valve (1) of thermostat is clear.
Should this valve be clogged, engine would tend to overheat.
2) Check valve seat for some foreign matters being stuck which
prevent valve from seating tight.
3) Check thermostatic movement of wax pellet as follows:
a) Immerse thermostat (1) in water, and heat water gradually.
b) Check that valve starts to open at specification temp.
c) If valve starts to open at a temperature substantially below
or above, thermostat unit should be replaced with a new
one.
Such a unit, if re-used, will bring about overcooling or over-
heating tendency.
Thermostat functional specification
INSTALLATION
1) When positioning the thermostat (2) on the thermostat case
(1), be sure to align its air breather valve (3) with mark (4).
2) Install thermostat cap (5) to thermostat case with align air
bleed valve and mark.
Then, tighten mounting bolts to specified torque.
Tightening torque
Thermostat cap bolts
(a) : 11 N·m (1.1 kg-m, 8.0 lb-ft)
Thermostat case bolts
(b) : 25 N·m (2.5 kg-m, 18.0 lb-ft)
3) Install intake manifold by referring to “Throttle Body and
Intake Manifold” in Section 6A1.
4) Fill the cooling system.
Temp. at which valve begins
to open80 – 84 °C (176 – 183 °F)
Temp. at which valve
becomes fully open93 – 97 °C (199 – 207 °F)
Valve liftMore than 8 mm at 95 °C
(203 °F)
2. Thermometer
3. Heater
Downloaded from www.Manualslib.com manuals search engine EXHAUST SYSTEM 6K-1
6F1
6F2
6G
6H
7D
7E
7F
7D
7E
7F
8A
8B
8C
8D
8E
9
7A1
6K
7C1
SECTION 6K
EXHAUST SYSTEM
CONTENTS
General Description ........................................6K-1
Maintenance ....................................................6K-1On-Vehicle Service ......................................... 6K-2
Exhaust Manifold .......................................... 6K-2
Exhaust Pipe ................................................. 6K-2
General Description
The exhaust system of this vehicle consists of the exhaust manifold, exhaust center pipe, muffler, seals, etc.
The catalytic converter is an emission control device added to the exhaust system to lower the level of Hydro-
carbon (HC), Carbon Monoxide (CO) and Oxides of Nitrogen (NOx) pollutants in the exhaust gas. The catalyst
in the catalytic converter is of “Three way” type.
Maintenance
At every interval of periodic maintenance service, and when vehicle is raised for other service, check exhaust
system as follows:
Check rubber mountings for damage, deterioration and out of position.
Check exhaust system for leakage, loose connection, dent and damage.
If bolts or nuts are loosened, tighten them to specified torque. Refer to “Components” in this section.
Check nearby body areas for damaged, missing, or mispositioned part, open seam, hole, loose connection
or any other defect which could permit exhaust fumes to seep into vehicle.
Make sure that exhaust system components have enough clearance from underbody to avoid overheating
and possible damage to passenger compartment carpet.
Any defect should be fixed at once. NOTE:
Whether following parts are used in the particular vehicle or not depends on specification. Be sure to
bear this in mind when performing service work.
Three-Way Catalytic Converter (TWC)
CAUTION:
Be sure to use UNLEADED FUEL for the catalytic converter equipped vehicle. Use of LEADED FUEL
will affect performance of the catalytic converter adversely to a great extent.
WARNING:
To avoid danger of being burned, do not touch exhaust system when system is hot.
Any service on exhaust system should be performed when system is cool.
