[AT] Q. for JD "experts"--or anyone.

[charlie hill]

That reminds me of something a mechanic friend of mine told me a few years 
ago.  He, at the time, worked for a Buick-Cadillac dealer.

If you remember the old 5.7 litre motor that GM converted into a poor excuse 
for a diesel it had a lot of problems with head gaskets.
My friend told me that when folks had bubbling and foaming in the cooling 
system of those engines that everyone just assumed the head gaskets were 
gone.  He said that wasn't necessarily true that a lot of them just had 
stopped up cooling systems.  He said that rust or whatever would accumulate 
in congested spots in the water jacket.  That would create a hot spot and 
the coolant in that area would  get trapped, not circulate properly and boil 
creating air bubbles.  The whole engine was not running hot, just one or 
more small "hot spots".  He said a good engine flush would often solve the 
problem.

I can't confirm that but it makes sense and seems to agree with what you 
said about the tractor you worked on.

Charlie

----- Original Message ----- 
From: <Wrench50 at aol.com>
To: <at at lists.antique-tractor.com>
Sent: Thursday, March 10, 2005 9:25 PM
Subject: Re: [AT] Q. for JD "experts"--or anyone.


>I had a tractor come in for repair that was frothing at the radiator. It 
>just
> didn't look like air bubbles (too small) . Pressure tested OK no leak 
> down.
> So we did a radiator and engine flush and rinse. Than refilled with 
> coolant.
> It cured the problem.
>                         Not sure what the cause was. The radiator had been
> cleaned and repaired, maybe left over detergent from cleaning? or someone 
> put
> soap in radiator? Filled radiator from a soapy bucket? not sure.
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