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Oil consumption on the 4.2 at 65k miles is at 1qt per 600 miles. Dealer tech can't find a leak...

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Old 09-22-2004, 12:38 PM
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Default Oil consumption on the 4.2 at 65k miles is at 1qt per 600 miles. Dealer tech can't find a leak...

... I thought it was valve cover gaskets but they don't seem to think so. Consumption has gone up from 1qt per 3K miles to 1qt per 600 miles.

They filled it to the max and told me to go back when I've put 1000 miles on the car... Any ideas on what may be going on?
Thanks!
Old 09-22-2004, 12:40 PM
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Default he doesn't think so or he sees no sign of it? any cracks in the oil pan?

leaking delivery and return lines to the oil pan... i mean did he even look? some dealerships ya know... sheesh.
Old 09-22-2004, 12:44 PM
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you would smell it, if it was leaking from the head gasket
Old 09-22-2004, 12:47 PM
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I can smell the oil, I can't see it in the garage. He says no leak was found.
Old 09-22-2004, 12:49 PM
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well that could be that it's leaking onto the manifold and burning off before it has time to drip
Old 09-22-2004, 12:56 PM
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Default bad valve seals?

My car started consuming oil at a rate like that around 80k miles. It continued on for about 10k miles. Around 90k, it went back to 1 quart/2500 miles and has been the same ever since. I'm now at 113k.
Old 09-22-2004, 04:12 PM
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Crankcase breather issue: pinched or plugged somewhere
Old 09-22-2004, 05:47 PM
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What would be involved in repairing this?
Old 09-22-2004, 06:12 PM
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Default Gotta find it first.

If you suddenly went from normal oil consuption to crazy oil consumption, there has been some sudden failure; things like value seals wear over time. If sudden, something changed suddenly. The A6 uses a fairly complex crank vent system. A plugged crank vent can cause oil comsuption. I would pull it all apart and check for blockages. Sorry to be vague, but there is no easy answer. Be persistent, don't guess at something and waste money repairing something that isn't broken, and be sure to post your findings here.
Old 09-22-2004, 08:50 PM
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Thanks


Quick Reply: Oil consumption on the 4.2 at 65k miles is at 1qt per 600 miles. Dealer tech can't find a leak...



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