Chuck’s engine build thread!

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legend57

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Interestingly, there are GM tech sheets that actually say to use the AC Delco coolant tabs. https://www.summitracing.com/parts/...PA0kGG3tXgHMA1esiuLSoVp86-CUGtZgaAqrLEALw_wcB

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These were used to solve micro-leaks from the factory.

I had a couple of head studs dripping on a new build. Apparently, the builder didn't seal them up well enough. I dropped in 2 tabs and after about 100 miles of driving, the leaks are gone.
 

legopnuematic

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These were used to solve micro-leaks from the factory.
The last job my grandfather did before retiring from the Wentzville GM plant was dropping those in radiators.
 

82SquareBurb

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Hehe we used those in all the ht4100 caddy engines back in the 80s, they ALL leaked at the cylinder sleeves.
 

ChuckN

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Interestingly, there are GM tech sheets that actually say to use the AC Delco coolant tabs. https://www.summitracing.com/parts/...PA0kGG3tXgHMA1esiuLSoVp86-CUGtZgaAqrLEALw_wcB

You must be registered for see images attach

These were used to solve micro-leaks from the factory.

I had a couple of head studs dripping on a new build. Apparently, the builder didn't seal them up well enough. I dropped in 2 tabs and after about 100 miles of driving, the leaks are gone.
Interesting! I’ve never heard of those.
 

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