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akm446 akm446 is offline
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Join Date: Aug 2017
Car: 2008 BMW 335i E93
Default Engine Replacement Preventative Maintenance - 10-04-2017, 01:29 PM

So I'm replacing my N54 in my 335i and I wanted to get a list of things I should replace while the engine is out for preventative maintenance reasons. So far I have:

Turbo oil line kit
Intake gasket set
Exhaust gasket set
Oil filter housing gasket set
Oil pan gasket w/ 1 time use bolts
Valve cover gasket
Vanos gaskets
8 O-rings for the coolant lines
1 time use trans bolts
1 time use water pump bolts

What else should I replace? Keep in mind I bought a short block so I'm having to change all the accessories over. Thanks.
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ms335i ms335i is offline
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Car: 2007 BMW 335i
Default 10-05-2017, 06:27 AM

maybe water pump/tstat if you have not replaced that.
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LessIsMore LessIsMore is offline
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Join Date: Aug 2012
Car: 2009 535i Sport SAT
Default 10-05-2017, 07:49 AM

+1 on water pump/t-stat
pulleys/belts?
coolant tank if original
motor mounts if original
good time to do Si inlets/outlets


2017 AMG C63 -JB4
2009 535i - 548whp - sold
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julienjj julienjj is offline
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Car: 135i
Default 10-05-2017, 08:53 PM

replace the vacuum lines that go to the wastegate actuators. They dry out over time, not fun to replace.


2008 135i 6MT | JB4 G5 | Back end flash | 30% E85 | Afe S2 DCI | VRSF ********* ** | N55 Mids | BMW PE | 335is clutch | 255 RE-71R | Forge DV | 2STEP relay |
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