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"Erkson, Toby" wrote: > Notice how a black car interior is always hotter than a tan or white > interior? Or how asphalt is warmer than concrete Yes I made the mistake of taking mainly black clothing to Burning Man last year (~120F). I'm well aware of this effect. But you stated that 'A black engine will run cooler than a white engine, all other things being equal' so you don't mean the case, just the tin correct? > Since the valve covers play a very important job in keep the oil cool you > want the covers dull. Why aren't the valve covers finned then? > It's hard to get a definite temperature change. There are SOOOOO many > conditions/variables involved. This is something you have to trust physics > and us with, I don't like faith... someone has surely done some comparitive tests with polished/unpolished and varying colored cases before eh? Thanks for the info Toby. Tom Mogombus ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe