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      12-09-2012, 08:05 AM   #3
Efthreeoh
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Drives: E90
Join Date: May 2012
Location: MARLAND

Posts: 3,059
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I've only done the profile gasket on the N52, but I'm assuming the N54 is similar as one of the parts diagrams shows the housing that looks the same as the N52. All I can recommend is make sure the old gasket is completely removed from both surfaces. Make sure there head surface is clean and shiny with no nicks in it. Also, drain the coolant and detach all the hoses going to the housing so it is free to seat properly. And last when you re-install the housing torque the bolts down evenly in a pattern (i.e. don't fully tighten down one bolt at a time).
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