Engine Overheating - Daewoo G424 Gasoline Service Manual

Engine Overheating

Symptom
1. Mechanically related.
2. Cooling system related.
G424 Service Manual
Cause
A. Engine rpm below specification for W.O.T. (engine laboring).
B. Wrong ignition timing.
C. Spark plug wires crossed (wrong firing order).
D. Lean fuel mixture.
E. Wrong heat range spark plugs.
F Exhaust restriction.
G. Valve timing off caused by a jumped or improperly installed timing chain
and/or gears.
H. Blown head gasket(s).
I. Insufficient lubrication to moving parts of engine.
A. Loose or broken drive belt.
B. Water shut-off valve partially or fully closed (if equipped).
C. Clogged or improperly installed water strainer (if equipped).
D. Water inlet hose kinked or collapsed.
E. Water pickup clogged.
F. Defective thermostat.
G. Obstruction in cooling system such as casting flash, sand, or rust.
H. Engine circulating pump defective.
I. Low coolant level.
J. Antifreeze not mixed properly.
K. Heat exchanger cores plugged.
179 Adjustment and Troubleshooting