Finding vacuum leaks
What method do you use to locate vacuum leaks and why do you like it.
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assuming for carb leaks, some use a little propane torch (unlit) to see if rpm goes up, i've also seen brake cleaner used
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I've used both carb cleaner and propane. I guess the propane is a bit safer, so probably better, but careful use of the carb cleaner is unlikely to start a fire. Today, I'm in the process of making a...
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Besides opening your eyes, you can simply spray water at any and all possible vacuum leak locations. You'll know if you find any.
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That has got to be two of the worst vacuum leak detection methods for all but the most obvious gross leaks.
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My mechanic Guru suggested water with a bit of dish detergent in an atomizer. When I asked why detergent, he said (I think I remember correctly?) the detergent will make water slip along hoses better....
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I guess someone needs to say this sooner or later: Don't light the propane torch!:S Keep the nozzle away from the carb inlets and when vacuum finds the raw propane the RPM's will rise. Another method...
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If using propane, do it outdoors! It is heavier than air & will lay in low spots until ignited or dispersed.
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I have used this method to find vacuum leaks. Take a piece of rubber hose and hold one end up against your ear, moving the other end around the engine listening for the hissing/sucking sound.
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In reply to # 3631755 by ohlord That has got to be two of the worst vacuum leak detection methods for all but the most obvious gross leaks. Absolutely. Yet somehow, it's always worked. I think it's...
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