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Old 09-05-2000, 12:16 AM
Mike Murrell's Avatar
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I believe that in previous posts, you've mentioned changing out VALVE SEALS in a 300E.
Afterwards, oil consumption went down consideraby.

Question? - Were the plugs oily before changing the seals? Thanks for your time.

Mike Murrell
'91 300-sel(M103)
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Old 09-05-2000, 07:59 PM
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Location: New Bedford, MA USA
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Mike, if it means anything, on my 89 300e the plugs were an oily mess. This was just before the head gasket let go, with 165k on the motor..

Jeff Lawrence
1987 300e
1989 300e
2000 Dodge Grand Caravan SE
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Old 09-05-2000, 11:44 PM
Mike Murrell's Avatar
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Jeff - thanks for your reply. I'm now beginning to believe my oil consumption is due to gasket leaks rather than guides/seals.

Regards...Mike Murrell
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Old 09-09-2000, 03:19 PM
Posts: n/a
Sorry for the delay in answering your question. I'm in Europe and find it very challenging to connect in Hotel rooms.

The experience I have with the valve seals involve records of the problem and the repair before I purchased my car. The records consisted of every receipt for every repair ever performed.

I do know that the oil usage went from a quart in hundreds of miles to virtually NO oil usage. I questioned this and found that there indeed was a SEVERE problem with the M103 engine.

It's hard to imagine a leaky gasket contributing that much to oil consumption. An oil leak so bad that it caused a quart of oil loss in a few hundred miles would probably absolutely paint the entire engine compartment and smoke while it was doing it.

The valve seals cost less than $10 from Mercedesshop parts shop and are replaced with a few hours labor. I would consider doing this before more major repairs unless the engine compartment has a nice solid coat of engine oil.

Good luck,

Larry Bible
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
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