big block camaro

i put them on my big block and am pushing compression into cooling system wit h an 18 pound radiator cap take cap off and nothing blows out runs perfect put cap on and car wont idle builds up pressure but nothing uin the oil or cylinders heads milled block decked no cracks in block or heads wtf ????????????? lost

Vortec355

Do a cylinder leakdown test with the valve covers off. I had a similar problem. When I did a leakdown check bubbles were coming up from the head bolt meaning the gasket failed. Did you use copper spray on the gaskets? How many runs do you have on them?

big block camaro

about an hour run time pissing me off didnt even think of that

big block camaro

no copper spray

BassProCamaro97

iTrader: (10)

Does your coolant smell?

Is your coolant bubbling with the cap off?

Are you running an overflow?

Any foaming in the radiator?

How do the plugs look?

Any coolant in the oil?

CAn you get ahold of a rad pressure gauge? If so put it on the car pump it to 13 or so and let the car run. See what happens.

I'm going through the same thing right now but my head gaskets let go.

~Jim~

mrdragster1970

.

That sucks. I'm on my 1st engine with the Cometic's and so far so good.
Not a lot of runs, but they have been issue free so far.
I installed them completely dry, but I did have the heads & block set up
to the exact RA they recommended. Hopefully they did the surfaces properly for you??

I'm at about 1200 HP and a 250 N2O hit.

Good luck checking everything.

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