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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


coolant leaking on manifold

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McCauley5983
coreys73chevelle
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G3GM :: G3 Tech :: Engine & Driveline

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coolant leaking on manifold Empty coolant leaking on manifold

Post by coreys73chevelle Sat Jul 17, 2010 12:47 am

i just got the High Rise today from Limey (really nice one too thanks Limey!) anyway. I installed it today.
put in a new thermostat just because they are cheap and worth the extra little bit, put on a new water neck (got rid of the stupid leaky chrome one for a stock style) and reinstalled it (gaskets looked great) and i tighted it up then squeezed the upper radiator hose a few times to get a lil pressure and it leaked coolant on the sides of the manifold so i tighted it up more and it helped but it still leaks coolant in one spot between the first two bolts on the passanger side.

-i know its not the wrong manifold it fits great but i was thinking that the gaskets on the sides (head sides) are maybe molded into form to the other manifold making it leak? so you think could new gaskets fix it? or a thicker gasket? the manifold walls are really really thick
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Post by McCauley5983 Sat Jul 17, 2010 2:07 am

did you reuse the old gaskets?
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Post by The Dude Sat Jul 17, 2010 8:25 am

Get new gaskets & don't forget to use silicone.
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Post by maliburacinfreak Sat Jul 17, 2010 1:05 pm

why would you attempt reusing old gaskets? intake gaskets are cheap and then, you only have to do it once.

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Post by 74chick Sat Jul 17, 2010 2:20 pm

Next time you take off the housing, rub it on the ground too help flaten out the gasket serface. Use two gaskets rtv'ed together and blue rtv.
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Post by pila Sun Jul 18, 2010 11:40 pm

Sounds like a lesson learned about re-using an old gasket. The only gaskets usually re-usable are the good, thick, silicone rocker cover gaskets, which work great for sealing.

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