Quote:
Originally Posted by dradernh
I have no idea if underhood temps have anything to do with your cooling issue, but on my E36 I was able to lower those temps significantly with a vented hood and Swaintech's White Lightning coating on my headers.
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I have no idea either
These are both good suggestions to keep in mind...
The thing that gets me is that it used to cool perfectly OK -- so something somewhere regressed. It's probably something simple like blocked radiator fins, or a kinked hose. Just need to spend a day in the shop going through the cooling system(s) piece by piece and see if anything pops up...