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oldsinner111 04-28-2013 09:10 AM

Need MB Doc
 
what does the AC Fan resistors do? I want to know if I can change values so fans will com on at 92c. Tried to put photo of it up.Attached Images

mbdoc 04-28-2013 09:46 AM

On the 1999 S320? Fan control is by fan control unit & is variable.

oldsinner111 04-28-2013 10:37 AM

Thanks MB,any thing I can do to avoid a headgasket I wil try to keep the M104 cooler.
I no they leak oil not compression but perhaps cooler oil will help.

mbdoc 04-29-2013 05:13 AM

Heat isn't the problem, the length of the engine is.
99.9% of M104 headgasket issues are oil leaks after 1993.
Movement of the aluminum head on the cast iron block & high oil pressure causes those leaks.


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