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Discussion Starter · #1 ·
I have encountered a log list of problems with my 89 16v turbo, sorry to admit that the route cause was most probable self inflicted. Suffice to say that cooling water got into the engine. After rectifying the cause I have now noticed that the pitch or sound of the turbo as it kicks in is of a higher pitched whine than before.

The car is as responsive as before and boost pressure appears to be the same (maximum just before the red). Any advice as to what might be the cause of the change in pitch? and is it an indication of a more serious problem?
 
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