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#2
23rd March 2020, 08:22 PM
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Did you replace the tensioners with genuine units or just change the pads? The right hand (bank 1) tensioner fails when it eats the filter gauze which then jams the cold start pin. The cold start rattle is the driver's side cam jumping about until the oil pressure is enough to tension the chain. Failure in the bank 2 tensioner is rare I think - of the engines I've dismantled, they are usually ok.
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#3
25th March 2020, 01:56 AM
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Both tensioners were replaced. Bank 1 is an OEM unit, replaced 4 years ago at Audi Service, (About 120.000km ago), the bank 2 that makes the noise, was replaced by myself about 80.000km ago with a brand new (FEBI I guess) unit (I replaced the Tensioner only, wothout replacing the chain!)
When installing the LPG, I also replaced the two oil check (one way) valves inside the block under the intake manifold (They sit in an upper oil pan). I ran pretty much all possible oils as I thought it was an oil issue: Mobil 1 0W-40 (10.000km) Aral High Tronic 5W-40 (10.000km) Mannol Extreme 5W-40 (10.000km) Mobil 1 5W-50 (10.000km) Ravenol RCS 5W-40 (15.000km) Ravenol RRS 10W-50 (15.000km) Mobil 1 Super 3000 X1 (10.000km) ..... No luck. And it's not just rattle. The chain is banging like crazy for few moments. There is no way I know when it's going to make it. I can leave the car over night and it bangs the chain, or leave it for few days and it starts smooth. I can leave it for 25minutes and it does the same. I have no check engine lights except now and then for a catalytic converter (value below treshold) which has nothing to do with this problem. The car goes and pulls like it should, I would say better than my 4.2 D3! And I drive it alot. 150km daily at least. Now it has 467.000km on the clock.
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S8 D3 FL II. Porsche Cayenne 958 Turbo BMW E83 X3 3.0d M-Sport Last edited by Versace; 25th March 2020 at 02:09 AM.
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#4
25th March 2020, 10:53 AM
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I don't know of any good quality after market manufactures of these tensioners. If you fit anything other than oem then I think you did OK to get 80,000k out of it. I changed mine a couple of years ago and after doing lots of research I couldn't find a quality after market unit. I doubt febi have done one. If you fit after market, you probably fit Chinese.
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Audi S8 D2 2002 88k mls Ebony pearl effect black. Grey interior.
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#7
29th March 2020, 08:59 PM
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I fit new chains when I did mine. I think they were only £50 each so I just did them while I was in there. The whole job cost me about £1500. New tensioners, chains, gaskets, Camshaft oil seals and I also used new Camshaft bearing cap bolts. Not sure I really needed to do that but was unsure if they were "torque to yield" so replaced them just in case.
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Audi S8 D2 2002 88k mls Ebony pearl effect black. Grey interior.
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This is another maintenance job that my car needs. Should I also buy new chains when replacing the tensioner?
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