How do you know if you have a sleeve that has unbonded from the block? My number 3 cylinder has zero compression. I have someone tearing it down to replace the head gasket and the exhaust valves if needed. Will it be obvious if the sleeve it jacked up?
Jason

 

Once the heads are off it is really obvious if the liner has fallen. It's hard to explain what to look for with a fallen liner but if you see it you'll know. It will kind of look like a ridge around the cylinder wall where the top of the liner is. Pretty easy to feel with your finger. A fallen cylinder liner won't necessarily cause a loss of compression. The rings will still be tight against the cylinder walls even if the liner has fallen. Losing coolant into the cylinders would be a more likely sign of a fallen liner. Zero compression is more likely a bad valve.

 

Thanks AK Rover. I hope all I have is a valve problem.

 

Once you know if it is a sleeve and not a stuck valve guide, then start looking for a used motor cause there is no financially reasonable way to repair it.

 

The sleeves can be replaced by a competent machinist at a rate of about $800 per cylinder is what I am told. That figure could be off but I know it's super expensive to resleeve an engine.