ok i have a 1984 camaro z28 5.0 HO this weekend i changed the valve seals
now on startup i didnt get any smoke!!!! so i took it out for a drive it was
running fine and not smoking at all so i got on it a little bit enough to spin the tires and after i let off it started pouring smoke and it did it all the time at idle while running then i shut it off and started it again and it went back to normal i also notice while changeing the valve seals and i had the egr valve off and when i pressurized the cylinder so the valve wouldnt drop a mixture of what looked like oil and gas shot out of the egr hole. and the whole time i had the cylinder pressurized it was hissing like air was leaking but i couldnt find out where.

 

Anyone?????

 

I would guess that the exhaust valve was open while you pressurized the cylinder. Even if just slightly the pressure will blow through the port and up through the manifold, If the valve is unhooked. Generally EGR passages are full of carbon and if your seals were detoirated, then probably full of oil too. I wouldn't take much head to that.

As to your car smoking, I'm curious as to wether or not you used the "umbrella" seal on the exhaust and the "positive" on the intake. Also did you install the little seal (almost looks like an o-ring) below the keepers. They are critical too.

Some people say to put the positive on both sides, idk, idc, I just put it back like oem, works for me.

 

The o-ring seals ones are tough. You need to compress the spring and retainer, install the o-ring then the keepers before uncompressing the spring. If you take the spring off, install the o-ring then reinstall the spring and retainer, you'll usually knock the o-ring out of it's groove.

As for the air leak, if both valves are closed with no spring pressure on the exhaust valve and you hear air escaping through the EGR, I'd say you have worn out valves/seats. If air was escaping into the crankcase, that's normal as it will always leak past the rings. Excessive leakage means worn rings.

That's why when diagnosing a poor running engine, a leakdown tester can tell you more information than just a compression tester. Doing a leakdown test can pinpoint problems that a compression test won't tell.