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      05-24-2019, 06:15 AM   #8
dpaul
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Drives: 2009 E90 335xi, 2011 E93 M3
Join Date: Dec 2012
Location: Boston

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Quote:
Originally Posted by TGTIW View Post
I think he's referencing the fact that a majority of N54s seize immediately after replacing the OFHG..
Perhaps you meant this as a joke in which case I apologize for my lack of humor. In any case this statement is completely untrue. Stop propagating this ridiculous myth around the internet.

OP-- as others have stated, you don't need a coolant flush unless you've got obvious signs of oil in the coolant.

Use a piece of tubing to siphon the coolant out of the reservoir before detaching the OFH. That way you won't spill any coolant on the block or your garage floor.

Follow the suggestion to loosen oil cap and let housing oil drain back to crankcase for a while - but even so, place plenty of paper towels around to catch oil spillage, which will inevitably occur.