Thread: 525i Head
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  #24  
Old 01-31-2011, 01:35 PM
injunmort injunmort is offline
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Location: sugarloaf ny
 
Join Date: Aug 2009
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Mein Auto: 1990 525, 1991 535
i dont know of pressure testing or how you would do it with the head off, the way i have done it in other appications is to magnaflux the head after it has been cleaned. this was done on high output motorcycle engines. i think a careful visual inspection should suffice on a stock street car, my opinion only. being an ohc engine you can easily set your valve gap adjustments prior to reinstallation of the head on the car. easier than doing when it is reinstalled. unless there is a real reason to suspect a catastophic failure eg a severely warped head or an obvious sign of failure in the aluminum, severly burned valve seats i would bet it is just the head gasket.
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