[AT] tractor hauler has rubbery gunk in coolant

[Doug Tallman]

Cecil, try dipping a rag in it to see if you can get it out. Maybe 
overfill the rad and force it out. If it's a one time deal, it will be 
done. If it reforms, I'd suspect somehow its getting oil in the 
coolant.  Doug T




On 11/19/2015 7:34 AM, Cecil R Bearden wrote:
> My 2000 F150 w/5.4L ( the former drug runner vehicle ), the one that had
> a 60K mile engine installed to replace the original.  Has some rubbery
> gunk on top of the antifreeze in the radiator tank.  The antifreeze
> looks green and ok underneath, but there is a 1/2 inch of this black
> rubbery gunk floating on the top that really feels like weatherstrip
> adhesive that never sealed up.  A friend who has a lot of experience
> with used cars said it could be silicone sealant that was used when the
> mechanic installed a new water pump..    Anyone had any experience like
> this?.  I really have too much money in this thing to try to sell it
> now..  It is running fine and cool, and everything works...
>
> Cecil in OKla
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