How To Change The Oil Filter Housing Gasket on BMW E46 N42 Engine
The oil filter housing gasket on the BMW E46 with N42 engines are widely known to deteriorate over time and especially after 100,000 miles. If you have an oil leak and suspect your oil filter housing gasket, you may be onto something. Keep reading to find out how to change it, it’s a quick job, 30 mins max with no special tools required.
- Socket set
- Torx screw set
- Pick tool
Note: You can get all your tools here.
Step 1 – Remove Intake Manifold Cover
Unscrew the 2 bolts and lift and gently pull the cover towards you to reveal all the bolts holding the oil filter housing.
Step 2 – Remove Oil Filter Housing Gasket Bolts
The housing is held in place using 3 bolts. I put some cloth around the area to prevent oil from spilling into the engine, though not much poured out.
Step 3 – Remove Pipes
There are 2 pipes that go into the heat exhanger. Remove the clips and genty tug on them to release.
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Once the pipes are removed you can carefully lift the housing and the heat exchanger off the engine unit.
Step 4 – Unscrew Heat Exchanger From Oil Filter Housing
Note: Inspect oil filter housing thoroughly to make sure it has not been warped! If that’s the case, you can get a used one here.
It is advisable to change the gasket that sits between the heat exchanger (also known as the intercooler) and the housing when you are changing the gasket that sits between the housing and the engine block. There are 4 screws that hold the oil filter housing and the heat exchanger together. You will need a torx screw to remove these.
Step 4 – Change Both Gaskets
Carefully remove the old gaskets, replace them and clean the area.
If you haven’t already bought the gaskets, they are under $15 on eBay.
Step 4 – Clean Engine Block Surface and Reassemble in Reverse Order
Carefully clean the surface where the oil filter housing sits and put everything back in reverse order.
Don’t forget to put your pipes back in place!
Disclaimer: Use this tutorial at your own risk, I do not assume any responsibility for any damage caused to your vehicle. This article is for entertainment purposes only.
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