On Sun, 16 Jan 2000 20:43:15 -0600 Charley & Peggy Robinson
<ccrobins@ktc.com> writes:
> Hmm,
Charlie,
The idea behind covering the oil cooler is that oils perform best
within certain temperature ranges, even though they are blended as
multi-viscosity lubricants.
20 weight oil is molassas-like at 20 degrees, so getting it to the
desirable viscosity and circulate in the engine quickly is the goal. In
bitter cold weather, the extra cooling of the oil cooler drops the temp
of the oil below the desired operating range. The sump itself will
provide sufficient cooling.
I have not seen any objective writings on the subject for automobile
engines, but there is a lot of it published for air-cooled aircraft
engines. Some planes are set up with shutters that control the air flow
to and through the oil cooler.
Bob
> ---snip--
> up OK in the winter and cools OK in the summer. I just can't figure
> why
> you have to cover the oil cooler; maybe I should, next cold snap.
>
> CR
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