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oil leak behind timing belt cover Topic is solved

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Clemens
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oil leak behind timing belt cover

Post by Clemens »

So after finishing the PCV job on my 94 T5M I noticed oil on top of the of the steering rack which apparently dripped from the front of the motor. After taking the TB off I noticed that the bottom of the TB cover was oily and the oil seems to have seeped from the "valve cover" gasket (the gasket that seals the cylinder head and the top part which covers the cams).
Now, the TB is due soon anyway and it seems bone dry for now.

Just wondering how to proceed with the leak. I have to mention that before doing the PCV my wife drove the car for 1500 miles or so with almost a quart of oil too much since someone must have overfilled it while she was on vacation. I guess that extra quart combined with the unserviced PCV caused the oil leak in the first place. I´m wondering if I should try to clean the TB cover, add some ATP 205 and drive for a while to see if the leakage persists.

Any input is appreciated.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V
kahl
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Re: oil leak behind timing belt cover

Post by kahl »

I would be suspicious that the cam seals are leaking. Very common on these engines.
scot850
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Re: oil leak behind timing belt cover  Topic is solved

Post by scot850 »

First I'd clean off the oil as best you can, and see what happens up until you get the TB done. You may well find that with the PCV now done, and oil at the correct level it may not continue to leak. If it does you can try the ATP 205. It worked for me and a RMS.

Good Luck!

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold
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Clemens
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Year and Model: 96 855 R + 94 855 T5
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Re: oil leak behind timing belt cover

Post by Clemens »

Thanks, I will check the cam seals and clean off everything I can without rinsing the TB with brake-cleaner (which the TB probably won´t like).
ATP-205 has fixed my RMS (quite a leak) on my 96 R, so I am pretty confident it could fix that easily.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V
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