Engine Diagnosis
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE DIAGNOSIS SYMPTOM
| SYMPTOM | PROBABLE CAUSE | REMEDY |
|---|---|---|
| Compression is too low | Blown cylinder head gasket | Replace the gasket |
| Worn or damaged piston rings | Replace the rings | |
| Worn piston or cylinder | Repair or replace the piston and/or the cylinder block | |
| Worn or damaged valve seat | Repair or replace the valve and/or the seat ring | |
| Drop in engine oil pressure | Engine oil level is too low | Check the engine oil level |
| Malfunction of engine oil pressure switch | Replace the engine oil pressure switch | |
| Clogged oil filter | Install a new filter | |
| Worn oil pump gears or cover | Replace the gears and/or the cover | |
| Thin or diluted engine oil | Change the engine oil to correct viscosity | |
| Stuck (opened) oil relief valve | Repair the relief valve | |
| Excessive bearing clearance | Replace the bearings | |
| Engine oil pressure too high | stuck (closed) oil relief valve | Repair the relief valve |
| Noisy valves | Malfunction of lash adjuster (including entry of air into high pressure chamber) | Check the lash adjuster |
| Thin or diluted engine oil (low engine oil pressure) | Change the engine oil | |
| Worn or damaged valve stem or valve guide | Replace the valve and/or the guide | |
| Connecting rod noise/main bearing noise | Insufficient oil supply | Check the engine oil level |
| Thin or diluted engine oil | Change the engine oil | |
| Excessive bearing clearance | Replace the bearings |