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What are valves seals made from m104.994
Reason notice fresh oil smell, coasting to a stop. Perfect engine braking.M104 maybe oil pipe from crankcase.never lose oil.
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Leaking valve guide seals would pull oil into the combustion chamber. You'd be smelling burned oil out the tailpipe. A "fresh oil" smell would suggest a valve cover gasket leaking.
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well smell at rear of car. are they rubber?
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Viton........
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Those produced in France are made from Roquefort; those made in Germany and Belgium are made from Limburger; and the Moon is made of ...., well, we all know.
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I believe valve seals are made from neoprene rubber.
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so they could crack from age,and not wear?
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I would guess the cracking comes more from heat and age, not wear.
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