I went to the MB dealership, and they stated this happens. Don't know why.
They have seen it more with the Kompressor motors. They wanted $200.00 for a
new valve cover! I'm going to get estimates for a repaint.
firstname.lastname@example.org (VIPERS969) wrote in message
It's almost certainly due to increased heat - the V8 in my car is
stuffed into a pretty packed engine compartment; making for prolonged
exposure to a hotter environment. The Kompressor should also increase
They wanted $200.00 for a
Actually $200 is not bad if labour is included - consider what 2 hours
of labour plus paint may cost. The difference you find may be
negligible. But in the end, the paint may peel again. I think they
should really have used an aluminum cover.
I've decided not to bother with my BMW. I've seen many, many similar
valve covers in other E39 V8s and it's the norm.
Try popping the hood every time you get home. That also helps to
protect the plastic radiators from similar degardation. I suspect it
is compounded by prolonged "cooking time". The makers have all gone
to cheaper, lighter plastic parts that eventually fall apart from heat
No valve cover is that cheap with labor... I believe he meant just the valve
cover... one... for his engine.
Opening your hood may seem like a good idea... but it is a hassle and wear
and tear on your hood shocks like on BMW and some MB.
I have a theory that the heat damage is mainly done after the engine
is turned off. In my BMW, the fan shuts off immediately when the
engine is shut off so the engine compartment is no longer ventilated.
When the car is in motion the air in the engine compartment is at
least refreshed by draft and fan action. The other things degraded by
the heat in my BMW are the plastic radiator and the left Xenon ballast
(too close to oil filter housing) - these are problems acknowledged by
In my case I think eventual hood shock replacements would be a very
small price to pay for avoiding unnecessary heat damage. My shocks
are still fine after 6 years. The hood is very easy to open and
close. I often use a hood bra so I have to pop the hood anyway as I
don't leave the bra on the car once I park.
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