Finding vacuum leaks

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(Propane method)
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tvarfafevet http://vatrqapv.livejournal.com/602.html
There are several methods for locating vacuum leaks. Occasionally, you may experience a vacuum leak into the intake ports from the crankcase of the motor due to the intake manifold / cylinder head interface not being machined parallel. No amount of propane or carburetor cleaner will find such a leak. The best way is to insure the elimination of such a problem while building the motor. See the wiki article: [[Manifold/Head vacuum leak, internal]].
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<a href="http://vatrqapv.livejournal.com/602.html">tvarfafevet</a>
 
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[url=http://vatrqapv.livejournal.com/602.html]tvarfafevet[/url]
=Propane method=
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[link=http://vatrqapv.livejournal.com/602.html]tvarfafevet[/link]
 
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golcefceuqet http://www.livejournal.com/interests.bml?int=golcefceuqet
#Get a soldering propane tank and valve attachment.
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#Unscrew the end of it so you have a threaded pipe without the nozzle.
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#Attach a 2 foot piece of hose to the end.
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#Start the engine and let it warm up a bit.
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cnadomtr http://dinhecve.livejournal.com/942.html
#Turn on the propane and run the hose all around the vacuum lines and the bottom of the carb.
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<a href="http://dinhecve.livejournal.com/942.html">cnadomtr</a>
#If the engine smooths out or revs up a bit, you have found your leak.
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Hold bottle UPRIGHT during testing as liquid propane may run out of an inverted bottle.
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ricrolcare http://zaefrxpoz.livejournal.com/555.html
 
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<a href="http://zaefrxpoz.livejournal.com/555.html">ricrolcare</a>
PLEASE do this in a well ventilated area due to propane gas and exhaust fumes!!
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[link=http://zaefrxpoz.livejournal.com/555.html]ricrolcare[/link]
Fixing a leak. My old neighbor built circle track cars and after the ran the engine  he would shut it off...tape off every opening with duct tape then put a hose over the dip stick and hook up to a vacuum source. He would then get his stethascope and listen in the area where the propane or carb fluid indicated a leak. he used Rtv and calked into the area until the stethascope whistle stopped. too much vacuum will pull too much calk into the hole.
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frlomenpyp http://frlomenpyp.livejournal.com
 
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=Carburetor cleaner method=
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[url=http://frlomenpyp.livejournal.com]frlomenpyp[/url]
#With the car running, using a can of carburetor cleaner spray down the hoses and vacuum connections.
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[link=http://frlomenpyp.livejournal.com]frlomenpyp[/link]
#Notice a change in the running of the engine and you might have found your leak.
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[[Category:Engine]]
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Revision as of 11:43, 26 April 2009

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