KehoeAutomotive

I often spend tons of time looking for vacuum leaks on various vehicles and much of that time on Turbo II's.

Well, I found a faster way. After that SnapOn man tried to sell me a "smoke Machine" for $1200, i decided to build my own.

All you need is a cheap Haloween Fog machine, some vacuum cleaner hose, and a roll of duct tape.

It works wonders!! I find leaks in intake hoses that I never suspected that were even there!!

Hope this info helps someone.

Rx7carl

How bout some dry ice and water in a mason jar. Just drill a hole in teh top and put a vacuum hose fitting so you can connect it to the intake mainfold?

seanrot

iTrader: (2)

and you what. hook it up to the engine and see where it comes out?

KehoeAutomotive

Yeah just pump in into your engine and if there is a vacuum leak, you'll see smoke.

I guess dry ice would work but it is had to produce dry ice everytime you need to find a vacuum leak.

Rx7carl

LOL, true, but then I dont have a fog machine either. I can get dry ice from Publix.

prefix

All you do is get a small propane bottle and while the engine is running wave it around the vacuum lines. If the engines picks up then you have a vacuum leak.

Wankelguy

I wonder what that fog machine liquid or dry ice does to engine internals?
The fog machines use a kind of liquid soap, and dry ice produces condensation.
I've always just squirted a little carb cleaner around the carb and intake manifold area, and listened for any change in the engine, myself. That is if I couldn't find it visually.

KehoeAutomotive

Using propane is a trick we have used for a long time and what we have discovered at my shop is that it's a FIRE HAZZARD!

Also the smoke shows more and smaller leaks than you can detect with the carb cleaner & propane method.

Water vapor or a tiny tiny amount of soap don't hurt a thing.