chased down my vacuum leak..need help - Lateral-g Forums

lutzy · #1 09-10-2011, 12:18 PM

I been trying to find a vacum leak and low and behold I stumbled across it..I ended up using a small airbrush compressor set at 3 psi and rigged up a adapter to my valve cover..as soon as I turned it on I heard the hiss coming from somewhere...I then got some soapy water and there was the bubbles..all around the base of the distributor. My question is, Can I just pull the whole disributor out and check to see why its not sealing? is there some sort of gasket on the base?Its a BB chevy.. any info I would appreciate it..thanks

70rs · #2 09-10-2011, 03:33 PM

Yes, you can pull it right out. Remove the cap with the wires still on it. Mark the location of the rotor in relation to the body(dist body). Also mark/note the location of your vac advance in relation to a fixed point on the intake manifold.
After you mark those locations remove the distributor. There should be a gasket where the dist body rests on the intake manifold.. Grab a new one before you start. Good luck.
PS that gasket goes on dry. No sealant. When you remove the dist, note how the rotor will twist/turn counter clockwise just a bit. When you drop it back in you will have to start just a bit counter clockwise from your mark. As it drops it will rotate into place. If you mark everything well you shouldn't have to retime the motor.

Vegas69 · #3 09-10-2011, 04:10 PM

If it doesn't leak oil, you don't have a problem. Crankcases are supposed to breath. Not normally through a distributor gasket, however.

**camcojb** · #4 09-10-2011, 04:38 PM

that is not an area of a vacuum leak. Appears the gasket isn't sealing completely but would have not affect vacuum.

lutzy · #5 09-11-2011, 04:42 AM

I'm using a vacuum pump off my valve cover.. And since there's air getting into my system it's allowing my vacuum pump to suck up oil.. I need everything air tight..

**clill** · #6 09-11-2011, 07:09 AM

If you are not familiar with pulling distributors and the leak is really a issue you want to solve. I would suggest just wiping clean around the base of the dist. with lacquer thinner then wiping a small amount of clear silicone sealer on it.

**camcojb** · #7 09-11-2011, 07:25 AM

Quote:

Originally Posted by lutzy

I'm using a vacuum pump off my valve cover.. And since there's air getting into my system it's allowing my vacuum pump to suck up oil.. I need everything air tight..

different kind of vacuum leak.