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Knocking on start up

Discussion in 'A8/S8 forum' started by rpurdell, Jan 18, 2011.

  1. rpurdell
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    rpurdell New Member

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    [Jan 18, 2011]
    hi all
    Have 2002 s8 which is a joy and wish to keep it,but have noticed that on start up a knocking rumble while oil gets around maybe for a second or so and then all seems fine,is this a problem of any serious note ??. Also has anyone got any thoughts on LPG conversion, good idea or bad idea ?
    Many thanks for your thoughts.
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  3. icenutter
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    icenutter Member

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    [Jan 19, 2011]
    If the oilways in the engine are getting a bit clogged up, then that would slow the oil getting around the engine.

    You could flush the engine out with flushing oil, then put some good stuff in it's place.
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  4. briang9
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    briang9 New Member

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    [Jan 30, 2011]
    My 2002 S8 with 69k on was getting a bit noisy on cold start, sounded a bit "bottom end", took it to an Indie Specialist and he suggested a new oil pump as a good starting point, unless he could be sure the oil pressure was spot on, anything else could be a bit of a wild goose chase to be honest. Anyway it wasnt cheap but seems to have done the trick, and way cheaper than a new engine if damage is being done on start up. (lots of folks suggest the V8s are a bit noisy on start up anyway but mine was very loud)
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