Quote:
Originally Posted by dieseldiehard
My OM604 cooling has temp fluctuations that are hardly anything compared to the OM603 but oddly my M104 seems to have a lot of temp variations, the engines use almost the same block and I assume the cooling systems are similar but I haven't really examined them closely.
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Have you pulled / inspected the M104 stat?
See my post 12 and 14
95 C280 Overheating
The M104 uses a stat that regulates water going to the rad rather than coming from the rad like the OM.