Thread: Intake manifold leak

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I suppose you could check for a lean cylinder with a heat gun,works pretty good on diesels.Hank

I know they make engine dyes,colored dyes, for the cooling system,to check for leaks.m
Maybe they have a dye for the oil ,you can see on the plugs ?

With the advent of the smoke machines used in auto repair shops today the easiest solution would be to fashion a plate for the carb mount, loosen all the intake rockers to close the intake valves and inject the smoke into the manifold thru the carb plate. Leave the oil filler off and watch for smoke out of the crankcase..

Originally Posted by HWORRELL

With the advent of the smoke machines used in auto repair shops today the easiest solution would be to fashion a plate for the carb mount, loosen all the intake rockers to close the intake valves and inject the smoke into the manifold thru the carb plate. Leave the oil filler off and watch for smoke out of the crankcase..

Thanks, that's more of what I had in mind, except allowing Joe Scratchrubber to check it at his house with simple tools. Maybe he doesn't even have shop air. If he installed a Schrader valve and a 0-15 psi gauge in the carb plate, then he could attempt to air up the intake volume with something as simple as a bicycle tire pump. If he couldn't get any pressure going, wouldn't that be proof positive that the intake wasn't sealed on the inner side? This would be, as you said, with all intake rockers loosened. I'm just trying to find a cheap way for any backyard hot rodder to do this operation.

Has anyone been able to find a carb plate with a hook on it used to remove the motor from the car? If they are available commercially, that would allow purchasing everything by mail. I made one years ago from scrap metal and an old u-bolt welded to it.