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