First Generation Firebird-L Mailing List
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I noticed after my rebuild the engine ran cooler too (for the few hundred
miles I drove it before moving to the next step of my restoration). As
other have mentioned the clearance of the water pump impellor to the backing
plate is critical on these cars. I swear, I think that mod alone is worth
as much as electric fans and high dollar radiators put together. The
clearance on my rebuilt water pump out of the box was HUGE. Some moderately
careful tapping with a hammer is all it takes. Given that Jim Hand decided
to put this mod in his book at the last minute - I'd say it is notable.
Later,
Chris - 67 Sprint Convertible 468
----- Original Message -----
From: "S Sterchi" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 25, 2009 9:30 PM
Subject: RE: [FGF] cooling question (Why do most of us have this issue?)
First Generation Firebird-L Mailing List
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I tried lots of things to improve my overheating problem but it never
resolved 100%. When I tore down the engine, I found that the two sleeves
that sit behind the divider plate and everything around them were gummed
up with sludge. It was like a layered cake with distinct and separate
black (manganese???) and white (calcium) sludge. The sleeves had about a
pencil-width diameter of flow. I assume this happened from storing the car
for long periods of time. Anyway, lots of different reasons for
overheating. Lesson learned...don't use tap water for your 50/50 mix... at
least if you have hard water like my area or high iron and manganese
levels.
Sheen
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