Originally Posted by jbrew
That's what works best. I use compressed air myself @ about 15-20 lbs, - only because I have the fitting reducer for the tailpipe. I know those Rigid shop vacs will plug right tho lol.
Yep, soapy water on the seams reveals all.
I'm suspecting a small exhaust leak, because after driving a while with blower on Low I'm getting a headache. With blower on High it doesn't bother me. My passenger side manifold has bolts into the head instead of studs and nuts, so it appears someone had some problems with it at some point. I can't hear any obvious puffing. I tried feeling around the manifold with the truck running, and I think I can feel a small leak, but it's hard to tell with all the air flow in that area with the fan running. I tried testing the air for CO with a battery powered home CO monitor, but it didn't show any reading above zero, so apparently it isn't really bad.
jbrew - Where did you get the fitting to connect the compressed air to the tailpipe? This seems like a good way to get the exhaust system pressurized. Also, I have a dual exhaust - any good way to plug the other side? I was thinking of using a big sponge with a plastic bag wrapped around it.