<VV> Oil Cooler

[Mark Durham]

Smitty, it really sounds like the culprit was the mud dauber nest. That
blocked the cooling air for that region of the cylinder head, and you had a
hot spot. And yes, the oil cooler must pass air to cool the oil, so, that
was a good catch!  Mark Durham

On Tue, Jan 10, 2012 at 1:15 PM, Smitty <vairologist at cox.net> wrote:

> Smitty Says;  When I was at Putnam Park last year, after 20 laps or so the
> overheat light came on.  Over the next 3 or 4 hours or so I jumped through
> all the wickets trying to figure out why.  That was (near as I can
> remember) his 8th year on the track and had never done that before.  By
> being very conservative we were able to squeeze out some hot laps even
> though losing power on the second lap.  I brought him home and ran some
> tests and checked some things out, but could never establish a reason.
>  Last week end I got one of them round tuits and pulled the shroud and
> manifold covers.  I found several places with stopped up fins. but right
> over the area where the snap switch was located, one of those mud dauber
> guys had built a nest covering an area about 1 1/2 inches by 2 1/2 inches,
> completely blocking the fins in that area.  Maybe there are other problems
> and I will keep looking.
> While I was at it I checked out the folded fin oil cooler.  Couldn't see
> through it.  Cut a strip of tin about 3/16 wide and rounded and polished
> the end of it.  After an hour I had cleared about an inch of fins.  Very
> unrewarding.  Checked the parts stash and found one I could read a
> newspaper through if I wished.  I'll be putting that one on tomorrow.  I
> don't understand but I don't question reality.  The one on the car was as
> clear as a new one when I put it on there.  You might want to go a little
> farther than just blowing air at yours next time you check it out.
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