Upper timing cover oil leak

[kenny1678]

Hi all,

I am having troubles resolving an oil leak that is causing oil to pool up on the top of the valve cover. I have replaced the upper timing cover gasket, seal for the cam variator, and the internal o-ring as well. From what I've seen, people are saying that o-ring is what leaks, but even with mine replaced I'm still having issues.

I will add pictures later, but the oil is visible at the bottom of the upper timing cover, but it is dry above that point, which is why I don't think it's the o-ring that's leaking. Is it possible that my upper timing cover is warped, and as a result the seal along the bottom edge is leaking? I'm not sure how this would result in the oil on top of the engine though. I do see some oil around the what I think is the high pressure fuel pump, so is it possible that is leaking oil and throwing it all over?

I'm hoping I can get some insight here, any help is appreciated.

[mrg_B8TFSi]

Yes it’s possible that the upper cover is warped or the 5 m10 or t30 bolts are not snug enough? Every time I open up the upper cover I always replace the gasket, the mag adjuster oring and internal seal.. that plastic cover is fine but I have no idea what Audi was thinking by only putting 5 bolts to it, there is way too much distance between each fastener IMO? I’d start with a torquing them to 10NM in a star pattern. If you clean up the area and then see more oil on the top of the cam tray you might consider new gasket, and seals. I fought this before after doing a timing chain and I eventually just bought a new upper cover


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[egecko]

Yes it’s possible that the upper cover is warped or the 5 m10 or t30 bolts are not snug enough? Every time I open up the upper cover I always replace the gasket, the mag adjuster oring and internal seal.. that plastic cover is fine but I have no idea what Audi was thinking by only putting 5 bolts to it, there is way too much distance between each fastener IMO? I’d start with a torquing them to 10NM in a star pattern. If you clean up the area and then see more oil on the top of the cam tray you might consider new gasket, and seals. I fought this before after doing a timing chain and I eventually just bought a new upper cover


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I did the same on my CAEB and noticed today theirs is oil marks near the bottom bolts on the upper timing cover. Since the bolts have a seal on them, the bolts would need to be replaced as well. 😞

I found the part number but everything I look at states it’s not for my 2010 A4 2L CAEB Avant Quattro. When I searched for bolts on Audi parts site, I find nothing, on internet there’s very little information about them and found this part# 06J103831.



I know the post is older, but someone will find this part number when searching for them. I’m very tempted to 3D print these rubber bolt gaskets out of TPU material with a higher infill to make them stiff and not too soft. TPU is printed @ 230°C which is 446°F. They won’t get that hot since they will be on the upper timing cover and sealing in the hot oil. I’ve printed some for taillight seals because they wear over time and allow water to leak in.