Boost Leak/pressure Tester

[dyl33]

yeah I understand that, I'll try again and see what happens, if not ill have to get a bigger compressor .

[Sklyn]

I Have read/seen people doing smoke & pressure test with incense or even a cigar as the smoke source.

Thoughts on this? I'm not sure that would be a good idea?

[scotty nm35]

No need for bong schmoke, you can easily hear the leaks with compressed air. Soapy water would work well too sprayed around the joins.

[Shoujiki]

^ I too used soapy water in a sprayer bottle. Was almost required really. Some of them you can hear but really hard to pinpoint when your hunting around the car. Most of mine were found with soapy water.

[Hanaldo]

Good way to pin point is to get a piece of hose, stick one end in your ear and poke the other one around the engine bay. Or if your missus is a nurse like mine then an old stethoscope is perfect

Personally I don't like spraying soapy water around my engine bay, too many shiny parts to have to clean up afterwards

[Shoujiki]

^ lol. Good excuse to get in there and polish it all up!

I have a 'automotive stethoscope'. Works pretty good. Just basically ear muffs with tubes plumbed into them. Great to find little noises, check injector ticking etc.

[dyl33]

Had another go could only get about 5psi into it. I will have to get a bigger compressor to get anymore just takes to long.

But I found 2 leaks and fixed them. When I finished and opened the oil fill cap the biggest woosh of comprssed air came out is that good?

[Shoujiki]

It's what should happen by the way your testing it yes, so perfectly normal. It means that there was pressure in there. Because of the way your testing it with the intake pipe/pcv, you may get leaks from areas that don't see boost, like the cam cover seals.