205
WSG-1068 COOLING SYSTEM
DIAGNOSING AND TESTING
Refer to the following Diagnosis Chart for cooling
system problems, their possible cause and
recommended correction. Refer to the pertinent part for
testing and repair.
The most frequent cooling system complaints are
leakage and overheating. Either of these problems will
soon render the vehicle inoperable.
Visual Inspection
Check for leakage at:
1. All hoses and hose connections.
2. Radiator seams, radiator core, and radiator drain
petcock.
3. All block core plugs and drain plugs.
4. Edges of all cooling system gaskets.
5. Water pump shaft and bushing.
NOTE: A small amount of antifreeze coming out the
water pump weep hole may be normal.
Most vehicles use an ethylene glycol base antifreeze
solution to which the manufacturers have added a dye
color. The dye color makes the antifreeze solution an
excellent leak detector. If this type of solution is not
being used in the cooling system, a vegetable dye may
be added to aid in locating external leakage.
NOTE: A small amount of antifreeze coming out the
water pump weep hole may be normal.
Examine oil dipstick for evidence of coolant
contaminated engine oil (white milky appearance).
To Next Page
Loading...
