#11
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As Mark has already said, the Valley cover gasket is a worthwhile fix if you can remove or get a mechanic to remove the manifold for you. Mine was leaking quite badly. There is a hole in the rear of the block, under the manifold, that lets the oil run down the back of the engine if it builds up too high. You could also do (or get done) the oil retention valves whilst in there. They're not really problematic but cheap enough to replace whilst in there. Just be careful removing them, they can be quite tight.
I would source a scan tool if I were you to see if the knock sensor is faulty. Pinking or pinging, I'm not sure which one it is, has a number of possible causes with the knock sensor probably being the easiest thing to check. Just be careful. Pre-ignition can lead to further engine damage if severe and persistent enough. I do not wish to scare you but personally I would limit how much I drive the car until sorted.
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Audi S8 D2 2002 88k mls Ebony pearl effect black. Grey interior. |
#12
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Just saw this on FB - this is apparently a type of rubber adhesive
Sugru might work too, although that might set a bit hard. |
#13
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I have been thinking about this a lot, the past few days.
While cleaning as much oil off as I can reach around the engine. The worst looks to be in the front of the engine, sprayed all over. Where I cannot reach unless I move the radiator. Where does the oil originate? I read somewhere that this can be caused by an oil leak under the intake manifold in the rear end, towards the windshield. Oil buildup on my generator also worries me, as the last one almost burned. Or could it also be an oil leak from the oil cooler? This along with the general "poor" condition of several hoses of different types. I feel a strong urge to have seals and hoses replaced. Along with the knock sensors. Thus, I feel very tempted to try to do it all by myself. Even though I barely understand how difficult such a job would be. And would the engine have to come out, for me to be able to access everything? Last but not least. How difficult is it to find the parts? I can't think of anyone who are able/willing to do this besides MJ.
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Johannes _________ Audi S8 -99, Pearlescent, Alcantara/silk napa leather, Burr walnut insert, Alcantara roof lining upper pack A8 32V engine ----- Jeep Grand Cherokee -98 |
#14
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Oil on the front is not from the valley gasket as that can only get down the back. Things on the front are cam and crank oil seals which usually tend to be a bit damp but not leak profusely. The usual culprit is cam cover gaskets which can leak oil on everything.
I would take the engine out for a full re-seal, but tbh thats just because its easier to do all the other jobs at the same time - oil cooler plastic pipe and the cam chain tensioners on the 40V. Its entirely possible to re-seal the cams, crank, cam covers and valley gasket with the engine in place, but the front end will need to come off - bumper, headlights, front panel, radiator etc. The AC condenser can be swung out of the way. Taking the inlet manifold off requires critical cleanliness - these engines collect a lot of schmutz between the manifold and the cylinder head so multiple stages of degreasing, vacuuming & air blasting are needed to clean the area as much as possible. Even then, some always remains once the manifold is lifted so I then go round with the vacuum again immediately after removing the manifold to pick up anything else before it can fall in the ports. Once everything is spotless I'll stick some duct tape over the ports while I do everything else. If I remember correctly, the crank sprocket bolt for the 32V is NLA, but I think there is an alternative from another model. Seals should be easy enough to get from the aftermarket. All the timing gear will need to come off to re-seal the cams and crank so you'll need to acquire the locking tools for the 32V which can be a challenge. Probably sensible to do the belt and tensioners while you're in there. Hoses will have to come from Tradition so its pot luck which ones they have unfortunately. Knock sensors are obviously easy enough to get aftermarket. |
#15
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Thanks again MJ. Good to know it is possible to do most of the work even if the engine is in place.
So far I have not seen a kit for the timing belt, only for the 40V; when I search the internet. But I do have part numbers for the engine: 077109119E Timing belt 077109244A Idler pulley 077109243A Tensioner pulley (077109243A Serpentine belt) 078121004HX Water pump and gasket 077103487A Camshaft cover oil seal Back in early 2018, I got an offer from Audi on the job. But it's to expensive considering everything else I want to do at this point.
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Johannes _________ Audi S8 -99, Pearlescent, Alcantara/silk napa leather, Burr walnut insert, Alcantara roof lining upper pack A8 32V engine ----- Jeep Grand Cherokee -98 |
#16
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I have decided to go ahead and try to do everything myself.
MJ, do I need all the special tools, 3197, 2079 and camshaft locator tools 3341? Or will I only need the locking bar for the camshafts? https://b2c.cdon.se/bygg-verktyg/kam...i-v8-p48600462
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Johannes _________ Audi S8 -99, Pearlescent, Alcantara/silk napa leather, Burr walnut insert, Alcantara roof lining upper pack A8 32V engine ----- Jeep Grand Cherokee -98 Last edited by Regulus; 16th July 2020 at 09:31 PM. |
#17
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Bar is for 40v engines. 32V you do not need bar, you need the other tools for 32V. I have the tools for 32V if you are interested.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#18
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Oh, so that is why I mostly have seen the use of the bar. I never suspected there would be a difference between the 32V and the 40V, concerning the tools used.
Thanks for pointing that out I've sent you a PM
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Johannes _________ Audi S8 -99, Pearlescent, Alcantara/silk napa leather, Burr walnut insert, Alcantara roof lining upper pack A8 32V engine ----- Jeep Grand Cherokee -98 |
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