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E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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Old 08-28-2013, 05:34 AM
pcy pcy is offline
Officially Welcomed to the 'Fest
Location: Boston
Join Date: Sep 2011
Posts: 1,852
Mein Auto: '06 530i, '07 C280, ML320
Crankshaft front seal replacement on N52


The [front] crankshaft seal seems to be leaking on my '06 530i with 130K miles. After wiping everything clean, after couple of weeks of driving, I see oil on the front portion of the lower pan and on the bottom of the pan.

I don't believe the full flow body (oil filter housing) gasket is leaking. I've looked very closely with a flashlight. Everything above crank pulley is very dry.

Valve cover gasket is new and I am absolutely positive it's not leaking.

I also don't believe the lower pan gasket is contributing to this oil leak based on what I see on/around the pan gasket.

That leaves me with front main seal. Has anyone replaced front main seal on N52? Amazon and others sell a tools kit for around $130 (with shipping) to replace the seal and the seal is around $30. TIS states that we need to use loctite/glue after inserting the new seal. I am contemplating with DIY or give the car to dealer. Your thoughts please....
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