Quote:
Originally Posted by paultyler1
Ok, latest on this. Car went to Volvo dealer. They report that piston rings have gone! Drove home (about 70kms), next morning more smoke. Fault is exactly as it was when I took the car to the garage originally. I think the garage was completely wrong with their original diagnosis. They claim this is a new fault as the car was ok for 5000 miles.
My question is, if the fault was originally the piston rings and they replaced the turbo, dbf and cat would this have eliminated the original smoke? Bearing in mind that the smoke only occured first thing for a few miles and then stopped is it possible that it has taken 5000 mainly motorway miles for the dpf and cat to become contaminated and not able to clean the exhaust gases hence the new emission of smoke?
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The piston rings are in the main engine block and no if they replaced the turbo, DPF and such like the smoke would not stop, it would have been consistent throughout.
I do think that having spent that money on it you need to go to a proper mechanic.
There are usually 2 forms of rings, compression and oil control. I would expect a lack of compression (they can read it with a gauge) on a cylinder if piston ring was failed.
Piston rings do not wear out on D5 engines (unless the vehicle has done hundreds of thousands of miles).
I think you need to do
More diagnostic work here.