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Old 12-30-2012, 08:41 PM   #14
Registered User
Join Date: Jun 2012
Location: Pittsburgh, PA
Posts: 20
My Ride: 2001 330Ci/5
After being a detailer at a BMW dealership for longer than I'd like to admit, it is fairly safe to rinse a motor. I've never had an issue with mine or any of the hundreds I've done at the dealership, using the same process time and again.

-Cover engine with water-based degreaser/APC (I like Ardex Green Stuff Plus)
-Let sit 5 minutes, but do not let dry
-Rinse with a hose with a nozzle, generously.
-Dry with compressed air via blow gun
-Apply dressing of choice.

Here are the results of that process on my 112k mile 330ci.

Last edited by Zack01GC; 12-30-2012 at 08:49 PM.
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