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  #11  
Old 06-08-2022, 08:45 PM
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Tug/pull on the tube inserts. Grommets fit/seal areas look wet. Do they feel loose? Do they semi-spin?

What brand are they? I would try a different set. Seal any mating area with Permatex sealer.

Use this one on sealing/mating surfaces. It’s my favorite for oil sealing gaskets.

Permatex HIGH TACK Gasket Sealant 4 oz

https://www.permatex.com/products/ga...-sealant-4-oz/
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Last edited by X5chemist; 06-08-2022 at 08:59 PM.
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  #12  
Old 06-08-2022, 10:21 PM
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Haha ok I don't want to seem dumb but which tube insert should I pull on. Are you talking about spark plug boots that go on top of spark plugs?
Are you talking about the rubber gasket for the spark plug tubes that sits on top of the tubes squeezed on top by the valve cover?
Maybe you meant inside the spark plug tube before I removed the valve cover? Because in my pictures the valve cover is already removed.
They seemed well in place before I pulled the cover. But it was hard to really reach or pull on them as they were squeezed by the valve cover from the top.

I dont remember the brand, but I ordered Felpro this time. It seems to have a very good reputation.

As to the mating surfaces, I guess I can put some sealant where the spark plug gasket goes into the valve cover.
Or are you saying I should also put gasket maket on top of the tubes where the gasket sits? Like under it?



Thanks for the product advice, will order it for the job!
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  #13  
Old 06-08-2022, 10:58 PM
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The metal tube inserted into the head. The spark plug metal tube sleeve. From pics, the valve cover grommets are where it leaked. Use sealer anywhere oil can seep out and not wanted. Use in the valve cover grove before inserting the gasket. Use on the head flat surface where the gasket seals. Use in the grommet seal grooves. Once you open the can, you’ ll see how tacky it is. Wipes up easily with brake cleaner. Use gloves!
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  #14  
Old 06-09-2022, 04:32 PM
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Quote:
Originally Posted by X5chemist View Post
The metal tube inserted into the head. The spark plug metal tube sleeve. ...
Does the M54 use spark plug tubes? The spark plug "tubes" appear to be part of the cast and machined head itself and not separate parts.

No way for them to leak!
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  #15  
Old 06-10-2022, 09:15 PM
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Maybe Xchemist is referring to the tubes that are part of the engine?
I guess the only place to leak would be on either side of the gasket.
So I had some gasket maker left and I pretty much glued in the gasket into the valve cover.
I can do the same thing on the side where the gasket makes contact with those aluminum tubes which are, like you said, part of the head.
I'm thinking that's the only place where a leak would be possible to have oil on top of the spark plugs.



I'm just waiting on a vanos kit to rebuild the vanos at the same time, before putting back the valve cover.
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  #16  
Old 06-11-2022, 01:57 PM
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How long ago was "a couple years"?
I found after about 3 years post VCG when I did the Head Gasket, my VCG was getting a bit crispy.
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  #17  
Old 06-11-2022, 03:42 PM
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It was literally two years ago and when I took it out, it looked like brand new.
There was no leaking around the valve cover, just down the sparkplugs for some reason.
After taking it apart I still don't know why it leaked.
Hopefully this time it won't leak down the spark plugs. I'm using extra gasket maker on tube gasket to make sure it's sealed for good.
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  #18  
Old 06-21-2022, 03:39 PM
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Looks like no more leaks this time.
I guess a bit of extra sealant can't hurt!
Applied directly on top of those aluminum tubes where sparkplugs go, between spark plug tube gasket and the tubes themselves. Also glued the 2 round spark plug tube gaskets directly into the valve cover on the other side. As per my picture is post #12
After running the car for a bit and removing the spark plugs, they're clean. No smoke or smell from exhaust either!
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  #19  
Old 06-21-2022, 05:21 PM
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Sweet. When it comes time for mine, I'll use the extra sealant. No gasket cover I've sealed has leaked with extra sealer.
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  #20  
Old 06-21-2022, 05:53 PM
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If you use OE BMW gaskets AND new OE BMW grommets you would have a lot less problems.
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