| TIBURON(GK) >2004 > G 2.7 DOHC > Engine Mechanical System > General Information>Troubleshooting |

TROUBLESHOOTING
Symptom | Probable cause | Remedy
Crankshaft bearing knock | Worn main bearing Seized bearing Bent crakshaft Excessive crankshaft end play | Replace Repalce Replace Replce thrust bearing
Piston and connecting rod knock | Worn bearing Seized bearing Worn piston pin Worn piston in cylinder Broken piston ring Improper connecting rod alignment | Replace Repalce Replace piston and pin or connecting rod Recondition cylinder Replace Repalce
Noisy valves | Faulty auto-lash adjuster Thin or diluted engine oil (low oil pressure) Worn or damaged valve stem or valve guide | Replace Change Repalce
Excessively worn cylinder and piston | Shorted or engine oil Dirty engine oil Poor quality of engine oil Improperly assembled piston and connecting rod Improper piston ring end clearance Dirty air cleaner | Add or replace Repalce Use proper oil Repair or replace Replace Clean air cleaner assembly and replace the air filter
Connecting rod and main bearing noise | Insufficient oil supply Thin or diluted engine oil Excessive bearing clearnace | Check engine oil level Change and find out cause Replace
Damaged crankshaft bearing | Shorted of engine oil Low oil pressure Poor quality of engine oil Worn or out-of-round of crankshaft journal Restricted oil passage in crankshaft Worn bearing Faulty oil pump Bearing improperly installed Non-concentric crankshaft or bearing | Add or replace Adjust or repair Use proper engine oil Replace Clean Replace bearing and check engine oil and lubrication system Repair or replace Repaur or replace Replace
Timing belt noise | Incorrect belt tension | Adjust belt tension
Low compression | Damaged cylinder head gasket Worn or damaged piston rings Worn piston or cylinder Worn or damaged valve seat | Replace gasket Replace rings Repair or replace piston and/or cylinder block Repair or replace valve and/or seat ring
Oil pressure drop | Low engine oil level Faulty oil pressure switch Clogged oil filter Worn oil pump gears or cover Thin or diluted engine oil Oil relief valve stuck (open) Excessive bearing clearance | Check engine oil level Repalce Replace Replace Change and find out cause Repair Replace
High oil pressure | Oil relief valve stuck (closed) | Repair or replace
Excessive engine rolling and vibration | Misfire Loose engine roll stopper (front, rear) Loose transaxle mount bracket Loose center member Broken transaxle mount insulator Broken engine mount insulator Broken engine roll stopper insulator | Correct Re-tighten Re-tighten Re-tighten Re-tighten Replace Repalce or repalce
Low coolant level | Leakage of coolant Damaged radiator core joint Corroded or cracked hoses (Radiator hose, heater hose, etc.) Faulty radiator cap valve or setting or spring Faulty thermostat Faulty engine coolant pump | Correct Replac Replace Replace Repacle Repalce
Clogged radiator | Foreign material in coolant | Replace
Abnormally high coolant temperature | Faulty thermostat Faulty radiator cap Restriction of flow in cooling system Loose or missing drive belt Faulty engine coolant pump Faulty thermostat seder or wiring Faulty electric fan Faulty thermo-sensor on radiator Insufficient coolant | Replace parts Replace Clear restriction or replace parts Adjust or replace Replace Repair or repalce Repair or replace Replace Refill coolant
Abnormally low coolant temperature | Faulty thermostat Faulty temperature gauge or wiring | Replace Repair or replace
Leakage from oil cooling system | Loose hose and pipe connection Blocked or collapsed hose and pipe | Replace Repair or replace
Inoperative electrical cooling fan | Damaged Loose pipe or in operative sensor | Replace or repair Repair or replace
Exhaust gas leakage | Loose connections Broken pipe or muffler | Re-tighten Repair or replace
Abnormal noise | Detached baffler plate in muffler Broken rubber hanger Pipe or muffler contacting vehicle body Broken pipe or muffler | Replace Replace Correct Repair or replace