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- Jun 2, 2003
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I posted those already over a year ago, because Molakule was collecting data. Still don't know if the data points at my car having loose or tight clearances. I think it might be interesting to some, because the issue of clearances and suitable oil viscosity keeps coming up.
1999 Audi 2.8 V6 12 valve motor, engine code AFC
- main bearing oil clearance: 0.0007 to 0.0018"
- con rod bearing oil clearance: 0.0006 to 0.00244"
- con rod side clearance: 0.0020 to 0.0122"
piston ring end gap,
- top compression ring: 0.014 to 0.020"
- 2nd compression ring: 0.020 to 0.028"
- oil control ring: 0.0098 to 0.0197"
piston ring side clearance,
- top ring: 0.001 to 0.003"
- 2nd ring: 0.001 to 0.003"
- oil ring: 0.001 to 0.003"
1999 Audi 2.8 V6 12 valve motor, engine code AFC
- main bearing oil clearance: 0.0007 to 0.0018"
- con rod bearing oil clearance: 0.0006 to 0.00244"
- con rod side clearance: 0.0020 to 0.0122"
piston ring end gap,
- top compression ring: 0.014 to 0.020"
- 2nd compression ring: 0.020 to 0.028"
- oil control ring: 0.0098 to 0.0197"
piston ring side clearance,
- top ring: 0.001 to 0.003"
- 2nd ring: 0.001 to 0.003"
- oil ring: 0.001 to 0.003"