Quote:
Originally Posted by brucepick
Don't those (decorative??) plastic shields over our more modern valve covers limit air cooling of the valve cover?
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They sure do.
They also cut down noise.
On my car, there's a foam insert underneath (and glued to) the plastic cover.
The foam came off the cover when an injector was leaking though - engine bay temps were VERY high then as it was blowing out hot exhaust gasses.
(High temps as in bonnet touchable, but too hot to hold on to.)