Any solutions to leaking oil filler cap?

335boston · 03-04-2020, 12:31 AM

Hello all! I've replaced my oil filler cap twice and it's still leaking . Stumbled on a new style oem cap that fcp says it will fit my car . Was wondering if this "new" design has a better seal than the original one or if there is any other better solution? I'll attach the link to the cap! Thanks in advance !

https://www.fcpeuro.com/products/bmw...ap-11127560482

marvinstockman · 03-04-2020, 07:55 AM

Check the sealing surface on the valve cover. Also, you might be building up too much pressure inside the valve cover.

Moisture · 03-04-2020, 04:22 PM

Quote:

Originally Posted by marvinstockman

Check the sealing surface on the valve cover. Also, you might be building up too much pressure inside the valve cover.

Would that be due to a bad/clogged PCV valve?

OP, how many oil caps are you going to replace until you realize that's not going to stop the leaking?

C4maro · 03-04-2020, 04:26 PM

Seems like having a dipstick would also be good for allowing excessive pressure to escape if your PCV malfunctioned. Rather than put pressure on crank seals

335boston · 03-06-2020, 10:52 AM

Quote:

Originally Posted by marvinstockman

Check the sealing surface on the valve cover. Also, you might be building up too much pressure inside the valve cover.

Checked the cover the other day and its all good no leaks and the gasket was replaced about a year back

335boston · 03-06-2020, 10:53 AM

Quote:

Originally Posted by Moisture

Quote:

Originally Posted by marvinstockman

Check the sealing surface on the valve cover. Also, you might be building up too much pressure inside the valve cover.

Would that be due to a bad/clogged PCV valve?

OP, how many oil caps are you going to replace until you realize that's not going to stop the leaking?

Maybe I'll buy one more and make it a whopping 3 caps

Sgop335 · 03-06-2020, 06:39 PM

Quote:

Originally Posted by 335boston

Maybe I'll buy one more and make it a whopping 3 caps

I wanted to make something like this,
https://vargasturbo.com/product/vtt-...case-breather/

335boston · 03-09-2020, 11:32 AM

Quote:

Originally Posted by Sgop335

Quote:

Originally Posted by 335boston

Maybe I'll buy one more and make it a whopping 3 caps

I wanted to make something like this,
https://vargasturbo.com/product/vtt-...case-breather/

Hey ,

I looked into those a bit too , but some people complained and got worried about oil expelling out of that filter into the engine bay. Some people for some reason take the gasket out of the oem cap clean it with brake cleaner then reverse the gasket when installing and have no leaks I think I might try it before I buy another cap .

mweisdorfer · 03-09-2020, 11:42 AM

I bought this one about 6 months ago. Works good. No leaking

335boston · 03-09-2020, 11:44 AM

Quote:

Originally Posted by mweisdorfer

I bought this one about 6 months ago. Works good. No leaking

Hey,

Did you buy the Vargas style cap or the newer designed OEM cap?

freakystyly · 03-09-2020, 11:49 AM

Just curious if that valve would work on a NA engine?

nsjames · 03-09-2020, 12:09 PM

Quote:

Originally Posted by freakystyly

Just curious if that valve would work on a NA engine?

assuming it has a check valve in it to keep it from becoming a giant vacuum leak I see no reason why not.

but really if your engine is making that much crankcase pressure and it's not a big baller high boost turbo car you should probably find out why.

freakystyly · 03-09-2020, 12:13 PM

It was more of a curiosity.
I'm not about to rip out my existing system (though it would cut down on some fire hazards) it is working fine. There would be at least 3 hoses that would need to be capped off if I replaced it with this thingamajig.

It certainly would simplify the whole external system the magnesium valve cover early N52s got.

mweisdorfer · 03-09-2020, 02:08 PM

Quote:

Originally Posted by 335boston

Quote:

Originally Posted by mweisdorfer

I bought this one about 6 months ago. Works good. No leaking

Hey,

Did you buy the Vargas style cap or the newer designed OEM cap?

Newer designed OEM cap

nuron · 03-09-2020, 09:46 PM

Just bought the newer designed cap as well and so far no leaks. Only had it for a couple weeks though.

03-04-2020, 12:31 AM	#1
335boston Lieutenant 55 Rep 521 Posts Drives: 2008 335i coupe Join Date: Jul 2018 Location: Boston iTrader: (0) Garage List 2008 335i [0.00]	Any solutions to leaking oil filler cap? Hello all! I've replaced my oil filler cap twice and it's still leaking . Stumbled on a new style oem cap that fcp says it will fit my car . Was wondering if this "new" design has a better seal than the original one or if there is any other better solution? I'll attach the link to the cap! Thanks in advance ! https://www.fcpeuro.com/products/bmw...ap-11127560482
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03-04-2020, 07:55 AM	#2
marvinstockman Major 399 Rep 1,078 Posts Drives: 2011 BMW 328i Join Date: Aug 2015 Location: Rockville, MD iTrader: (0)	Check the sealing surface on the valve cover. Also, you might be building up too much pressure inside the valve cover.
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03-04-2020, 04:26 PM	#4
C4maro Private First Class 81 Rep 184 Posts Drives: 335i Join Date: Aug 2018 Location: Canada iTrader: (0)	Seems like having a dipstick would also be good for allowing excessive pressure to escape if your PCV malfunctioned. Rather than put pressure on crank seals
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03-09-2020, 11:42 AM	#9
mweisdorfer Major General 1903 Rep 6,968 Posts Drives: 2007 Black/Black 335i e90 Join Date: Apr 2011 Location: Holly, MI iTrader: (0) Garage List 2007 BMW E90 335i [0.00] 2008 bmw x5 [0.00]	I bought this one about 6 months ago. Works good. No leaking
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03-09-2020, 11:49 AM	#11
freakystyly Lieutenant Colonel 2996 Rep 1,798 Posts Drives: F22 B58 6MT Join Date: May 2016 Location: Ontario iTrader: (0)	Just curious if that valve would work on a NA engine?
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03-09-2020, 12:13 PM	#13
freakystyly Lieutenant Colonel 2996 Rep 1,798 Posts Drives: F22 B58 6MT Join Date: May 2016 Location: Ontario iTrader: (0)	It was more of a curiosity. I'm not about to rip out my existing system (though it would cut down on some fire hazards) it is working fine. There would be at least 3 hoses that would need to be capped off if I replaced it with this thingamajig. It certainly would simplify the whole external system the magnesium valve cover early N52s got.
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03-09-2020, 09:46 PM	#15
nuron Private First Class 80 Rep 199 Posts Drives: '07 328i Join Date: Jul 2016 Location: Washington iTrader: (0)	Just bought the newer designed cap as well and so far no leaks. Only had it for a couple weeks though.
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