swirl flap blank o ring size

MrFrizzzz · 12-22-2023, 04:29 AM

Think I’ve pinned down my oil leak to the swirl flap blanks. These were fitted before my ownership to solve an oil leak.

Question is what size are the o rings? Would rather replace these than replace the whole lot of blanks.

Also is it acceptable to use tiger seal on these just in case I haven’t got the right size?

Thanks!

Tambohamilton · 12-22-2023, 05:19 AM

Are you trying to solve an oil leak because the engine is losing oil, or because there's oil making a mess down the side of your engine?

O-ring size will depend on the blanks, but probably something like 27mm ID x 3mm CS.

MrFrizzzz · 12-22-2023, 01:35 PM

Quote:

Originally Posted by Tambohamilton

Are you trying to solve an oil leak because the engine is losing oil, or because there's oil making a mess down the side of your engine?

O-ring size will depend on the blanks, but probably something like 27mm ID x 3mm CS.

Thanks for the reply! Bit of both. Losing about 2l every 6k miles and there’s a whole mess under my intake manifold and around all the boost pipes. Did the VCG a year or two back and replaced the intake manifold seals at that point.

Had to change the starter motor a few months back and noticed there was a lot of oil around the swirl flap blanks so going to try changing those next.

Tambohamilton · 12-22-2023, 10:11 PM

Sealing up the swirl flaps is no bad thing, but it won't help with the oil loss - it'll just stop it from making a mess down the side of your engine.

I'd investigate the crankcase vent on the valve cover, personally

MrFrizzzz · 12-23-2023, 08:51 AM

As in just replace it? I’ve replaced both the crankcase breather itself and the pipe that goes into it twice and never noticed a decrease in the oil leak. I know it’s coming from the intake manifold area because that’s where all the oil is. Just unsure of the cause!

Maybe I’m just destined to have an oil leak forever with this car lol.

Tambohamilton · 12-23-2023, 12:50 PM

Yeah, I don't know why exactly some people have issues with oil consumption. I'm just grateful that (for now at least) mine isn't using a problematic amount

MrFrizzzz · 12-23-2023, 04:28 PM

So I found a thread on another site and the guy on there was saying that it’s down to the new style crankcase breathers allowing oil to leak from the intake manifold and that changing to the old foam filter crankcase breather will generally solve or minimise oil leak from that area.

Have to see about getting one and giving it a try!

12-22-2023, 04:29 AM	#1
MrFrizzzz Enlisted Member 3 Rep 41 Posts Drives: E91 BMW 335d Join Date: Sep 2019 Location: UK iTrader: (0)	swirl flap blank o ring size Think I’ve pinned down my oil leak to the swirl flap blanks. These were fitted before my ownership to solve an oil leak. Question is what size are the o rings? Would rather replace these than replace the whole lot of blanks. Also is it acceptable to use tiger seal on these just in case I haven’t got the right size? Thanks!
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12-22-2023, 05:19 AM	#2
Tambohamilton Brigadier General 3301 Rep 4,230 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Are you trying to solve an oil leak because the engine is losing oil, or because there's oil making a mess down the side of your engine? O-ring size will depend on the blanks, but probably something like 27mm ID x 3mm CS.
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12-22-2023, 10:11 PM	#4
Tambohamilton Brigadier General 3301 Rep 4,230 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Sealing up the swirl flaps is no bad thing, but it won't help with the oil loss - it'll just stop it from making a mess down the side of your engine. I'd investigate the crankcase vent on the valve cover, personally
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12-23-2023, 08:51 AM	#5
MrFrizzzz Enlisted Member 3 Rep 41 Posts Drives: E91 BMW 335d Join Date: Sep 2019 Location: UK iTrader: (0)	As in just replace it? I’ve replaced both the crankcase breather itself and the pipe that goes into it twice and never noticed a decrease in the oil leak. I know it’s coming from the intake manifold area because that’s where all the oil is. Just unsure of the cause! Maybe I’m just destined to have an oil leak forever with this car lol.
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12-23-2023, 12:50 PM	#6
Tambohamilton Brigadier General 3301 Rep 4,230 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Yeah, I don't know why exactly some people have issues with oil consumption. I'm just grateful that (for now at least) mine isn't using a problematic amount
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12-23-2023, 04:28 PM	#7
MrFrizzzz Enlisted Member 3 Rep 41 Posts Drives: E91 BMW 335d Join Date: Sep 2019 Location: UK iTrader: (0)	So I found a thread on another site and the guy on there was saying that it’s down to the new style crankcase breathers allowing oil to leak from the intake manifold and that changing to the old foam filter crankcase breather will generally solve or minimise oil leak from that area. Have to see about getting one and giving it a try!
	Appreciate 0 Quote