Quote:
Originally Posted by Tomcat_F15_STL
Replacing Plugs is a wise move. I've only ever needed to replace a single coil in 140k miles - so, I would not do that, myself.
Clean the vanos solenoids and new o-rings. New valvetronic seal. New Crankcase Vent Pipe Hose.
Oil Filter Housing Gaskets (OFHG) would be a good choice since you are in the area, too.
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These are great suggestions, however, I’d prolly avoid the OFHG unless it’s actually leaking. Due to the oiling passage ways in the n55 that are prone to aeration and resulting rod bearing issues I only like to open the oiling system when I absolutely have to.
If you do open the system, it’s critical that you do the BMW recommended TSB for oil priming. Technically, you shouldn’t have any issues after that, but it doesn’t exactly give me warm fuzzies.