Engine How common are blown head gaskets on a stock 5.0?

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limp

wrap a little cheese around it and its a done
Oct 4, 2020
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Last I knew the red stuff was used in GM vehicles with some "pellets" to stop the water leaks caused from the plastic intake manifolds GM loved to use... My info is a few years old, but as far as I know they still do it.....
 

90sickfox

Wasn't a pretty sight...and I've got big hands
SN Certified Technician
Mar 2, 2015
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Last I knew the red stuff was used in GM vehicles with some "pellets" to stop the water leaks caused from the plastic intake manifolds GM loved to use... My info is a few years old, but as far as I know they still do it.....

That pellet stuff was with the Northstar engines. I rebuilt a bunch of those. Complete PITA. The GM stuff is Dexcool and it's orange. ( they still use it ). The closest OEM to red is the Toyota fluid but it's pink. I posted what it was. I know a few guys that swear by it in their race cars. It doesn't corrode, break down, or cause electrolysis like regular antifreeze. I've never used it personally. I did use Toyota fluid in one of my mustangs because of its self sealing properties. The gaskets never leaked. :shrug: I wouldn't recommend it or do it to anyone else's car though.
 

shindokwan

New Member
May 6, 2022
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I have a 65 GT. no oil in water, no water in oil. compression within 4 pounds all around. Headgaskets 10 miles ago after "ace" mechanic diagnosed bad gasket. Blows water like old faithful. Runs strong but has combustion gas in rad. Best guess is cracked head and no time to tear it down
Did you ever find a solution to this issue? I am having the same issue with my 1995 Mustang Gt 302, installed a new upper / lower intake and a new 3 core radiator and ever since I have been having pressure and bubbles in my coolant system that I cannot bleed out. When I drive it I get the same "old Faithful" overflow of my expansion reservoir. I have also torn down my heads and the gaskets appear fine and I see no cracks in the cylinder or combustion chamber of the head. hoping you found a solution to this since December.