rx-7fc

i just put a 89+ intale manifold and i have a vacuum leak
right where the manifold goes to the engine and i took it off about 3 times to try to fix the leak and it still has a leak but right now it is less than the other times and i just bought a new gasket not that long ago but i had it on with my old manifold and it idles at about 1500 rpm but the first time i had it on it idled ok at about 800rpm and it had a leak.what would make it go up to 1500rpm and how do i fix the leak.And what are the torque specs

NZConvertible

I've had this problem before, after the third R&R of the turbo and intake manifold I traced it to a tiny piece of old gasket still stuck to the rotor housing. It was hard to see and even harder to get off!

rx-7fc

i repalace almost all vacuum lines when i put a new gasket but this is when i had my 86 intake manifold on but i put a 89+ manifold and now it leaks and the gasket is about one month old and i don't think it leaked when i had my 86 manifold on.what if you put more than 20 pound of torque

NZConvertible

You'll probably snap a stud/bolt. Haynes specifies 14-19 ft-lb, so I wouldn't go over 20.

rx-7fc

ok i will torque it down to 20 them i just came back from mazda and they want 30 for the gasket and i bought it for 5 from racing beat and can you use the gasket more than on time because i did so i don't know if that would make it leak and the gasket have is the metal one

rx-7fc

what kind of gasket is better the metal one or the paper