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      06-12-2025, 07:45 AM   #12
bigjae1976
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2013
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Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Houston, TX

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2004 BMW M3  [6.33]
2011 BMW E90 M3  [6.83]
2013 BMW 328i  [6.67]
Quote:
Originally Posted by amg6975 View Post
It's pretty well sealed up, I used expanding foam weather stripping to get a good seal around the rad and oil cooler.

No hood vents, that seems unlikely to help oil temps but it's on my list paired with a carbon hood. I think especially after adding the aux water radiator water temps won't be a concern, unless the oil heats the water up way more than I'm expecting. Lowering water temps will certainly help everything once the water-oil exchanger is in but I want to try to change as few things as possible between tests.
I'm assuming you have the OE e9X oil cooler? On an E9X, the oil cooler is vented out of the underbody panel. In that case, venting the hood likely won't have much effect on oil cooling.

If your oil cooler is just venting into the engine bay then venting the hood will make a difference.
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