540i PCV valve worth to take off manifold? - Bimmerfest - BMW Forums



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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 09-06-2019, 12:24 AM
shadybeings shadybeings is offline
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Mein Auto: 2001 540i 6spd sport
540i PCV valve worth to take off manifold?

Currently need to replace my PCV valve, which I have and have the grommet waiting for my at autozone.

I tried going at it before I realized I might need a new grommet but it sucked, I couldn't loosen one bolt.

If I get the manifold off will it be worth it? I can get manifold gasket for $70 and honestly I'd take the chance on that rather than keep losing bits
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Old 09-06-2019, 02:52 AM
Chedley Chedley is offline
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If you take off the manifold, you might as well do few other jobs "while you are there" to make it worth it: intake gaskets, valley pan, cooling tubes, knock sensor,..etc...
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Old 09-06-2019, 05:06 PM
edjack edjack is offline
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Some do remove the manifold; others make sure the recesses in the Allen head bolts are clean, and also grind the bit flat, so the bit will fully seat in the bolt. Otherwise, one runs the risk of rounding out the bolt.

Once removed, replace the bolts with hex head items.
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Old 09-07-2019, 03:25 AM
Chedley Chedley is offline
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There are 3 ways you could use to remove those Torx screws that hold the CCV at the back of the manifold. Definitely, clean the head bolts from any gunk.

-- use the the right Torx bit (I think it is T-15)
-- use a flat-head screw driver large enough to fit exactly in the grooves of the screws
-- use an Allen wrench of the proper size

With some patience and good luck, try them all, and you can get that CCV out without removing the whole manifold. Use regular hex screws when you install the new CCV, that makes it much easier.
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