JETHROIROC

I pulled the radiator cap off today and the coolant had solidified all around the inside of the filler neck in a gel-like mass. What gives? Thanks.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

Engineboy

Sounds like someone has put in a stop leak of some sort at one time.

Some stop leaks leave gel, others leave hard crystals, some make a wierd dust around the rad. cap.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...

R.I.P. #3
"He can see air"

JETHROIROC

Thanks, Engineboy. I also talked to my old man last night and he said he had half an old jug of Prestone that had done the same thing. This is really strange. Since the car was used, the stop leak theory sounds good. But why was that jug of fresh stuff solidified (in 75* weather). Looks like it's Havoline for me from here on out!