Quote:
Originally Posted by wilbydoughboy
I would have assumed that by having to much engine oil than the normal amount it would cause the oil pressure to rise. I remember once that I put in to much engine oil in my Ford Escort and the smoke that was belching out from the exhaust was very dense but this was a petrol engine so maybe with the diesel engine this wouldnt happen. I will keep an eye on the oil level but I havent been informed that I should check for rising oil level because I have put my trust in the Volvo brand and hope that their technicians would put the correct amount in at the service and inform me that this can rise. I dont feel that owners should take the blame for rising oil levels unless they are informed by Volvo and no blame should be put upon owners who would probably never have bought their cars if they knew that they had to keep an eye out for rising oil levels.
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Excess oil will not cause the oil pressure to rise - it will cause the smoke you mention as the oil enters combustion chamber due to it splashing around excessively in the crankcase and usually being pushed up the crankcase breather into the air intake.
The effect on a petrol engine is to cause dense clouds of blue/black smoke, on a diesel it can cause runon, where the engine cannot be stopped.
Oil pressure is created by the oil pump which lifts the oil directly from the sump and is distributed to the bearings in the engine.
Your choice on whether to check the oil levels or not, I am not sure that I would put my trust in an oil level check that is done once per year at a service though
