LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2007 >> Optra5 LS, Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine Mechanical - 1.8L (L79) >> Diagnostic Information and Procedures >> Connecting Rod Bearing Noise Symptom

Connecting Rod Bearing Noise Symptom

Step Action Yes No
1 Is a knock noise heard under all engine speeds? Go to Step 2  System OK
2 Inspect the crankshaft connecting rod journal.
Is the crankshaft connecting rod journal worn?		 Go to Oil Pressure Diagnosis and Testing  Go to Step 3 
3 Measure the oil pump pressure.
Is the oil pump pressure low?		 Go to Crankshaft Replacement  Go to Step 4 
4 Inspect the crankshaft connecting rod journals.
Are the journals out-of round?		 Go to Piston, Connecting Rod, and Bearing Replacement  Go to Step 5 
5 Inspect the connecting rods.
Is there a misaligned connecting rod?		 Go to Piston, Connecting Rod, and Bearing Replacement  Go to Step 6 
6 Inspect the connecting rod bolts.
Are the connecting rod bolts torqued properly?		 System OK Go to Piston, Connecting Rod, and Bearing Replacement 
scientia non olet · About LEMON Manuals