Re: Time to start asking 460 questions

Posted by Sean in Calgary on July 19, 2004 at 15:39:50 from (66.244.207.150):

In Reply to: Time to start asking 460 questions posted by Kelly C on July 17, 2004 at 19:23:00:

I have seen a bunch of posts on here about what you want to spray to look for intake manifold leaks. If you have ever looked for vacuum leaks in newer cars you know what a bear that nightmare maze of capillary tubes can be. A leak in a manifold gasket can be diagnosed in exactly the same way. Although the WD-40 will work more or less and so will oil or carb cleaner, they all get rather messy. An old mechanic friend taught me to look for these leaks using a propane torch that isn't lit. When you aim the blowing propane over the vacuum leak (capillar tube or intake manifold) it will suck in the propane, which burns nicely in the engine and leaves no residue. Obviously, if I am doing this for more than a second, I make sure some barn doors are open.

So, for a nice clean way to find vacuum leaks, use your handy old propane torch - just not lit.

Sean in Calgary

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