Symptom | Probable cause | Remedy |
Low compression | Blown cylinder head gasket | Replace gasker |
Worn or damaged piston rings | Replace rings | |
Worn piston ior cylinder | Repair or replace piston and/or cylinder block | |
Worn or damaged valve seat | Repair or replace valve and/or seat ring | |
Low oil pressure | Low engine oil level | Check engine oil level |
Faulty oil pressure switch | Replace | |
Clogged oil filter | Replace | |
Worn oil pump gears or cover | Replace | |
Thin or diluted engine oil | Change and determine cause | |
Oil relief valve stuck (open) | Repair | |
Excessive bearing clearance | Replace | |
High oil pressure | Oil relief valve sutck (closed) | Repair |
Excessive engine vibration | Loose engien roll stopper (front, rear) | Re-tighten |
Loose transaxle mount bracket | Re-tighten | |
Loose engine mount bracket | Re-tighten | |
Loose center member | Re-tighten | |
Broken transaxle mount insulator | Replace | |
Broken engine mount insulator | Replace | |
Broken engine roll stopper insulator | Replace | |
Noisy valves | Thin or diluted engine oil (low oil pressure) | Change |
Worn or damaged valve stem or valve guide | Replace | |
HLA abnormal operation | Speed the engine up (for venting) or Replace the HLA | |
Connecting rod and/or main bearing noise | Insufficient oil supply | Check engine oil level |
Thin or diluted engine oil | Change and determine cause | |
Excessive bearing clearance | Replace | |
Timing belt noise | Incorrect belt tension | Adjust belt tension |
Low coolant level | Leakage of coolant | |
1. Heater or radiator hose | Repair or replace parts | |
2. Faulty radiator cap | Tighten or replace clamps | |
3. Thermostat housing | Replace gasket or housing | |
4. Radiator | Repair or replace | |
5. Engine coolant pump | Replace parts | |
Clogged radiator | Foreign material in coolant | Replace coolant |
Abnormally high coolant temperature | Faulty thermostat | Replace parts |
Faulty radiator cap | Replace parts | |
Restricted flow in cooling system | Clear restriction or replace parts | |
Loose or missing drive belt | Adjust or replace | |
Faulty water pump | Replace | |
Faulty electric fan | Repair or replace | |
Insufficient coolant | Refill coolant | |
Abnormally low coolant temperature | Faulty thermostat | Replace |
Faulty temperature sensor wiring | Repair or replace | |
Inoperative electrical cooling fan | Damaged thermo sensor, electrical motor, radiator fan relay and wiring, fuse | Replace or repair |
Exhaust gas leakage | Loose connections | Retighten |
Broken pipe or muffler | Repair or replace | |
Abnormal noise | Detached baffle plate in muffler | Replace |
Broken rubber hanger | Replace | |
Pipe or muffler contacting vehuicle body | Correct | |
Broken pipe or muffler | Repair or replace |
