Finding vacuum leaks

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goletabocli http://trpimenpitex.livejournal.com/1408.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://trpimenpitex.livejournal.com/1408.html">goletabocli</a>
 
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[url=http://trpimenpitex.livejournal.com/1408.html]goletabocli[/url]
=Propane method=
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[link=http://trpimenpitex.livejournal.com/1408.html]goletabocli[/link]
 
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jenfraltde http://www.livejournal.com/interests.bml?int=jenfraltde
#Get a soldering propane tank and valve attachment.
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<a href="http://www.livejournal.com/interests.bml?int=jenfraltde">jenfraltde</a>
#Unscrew the end of it so you have a threaded pipe without the nozzle.
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[url=http://www.livejournal.com/interests.bml?int=jenfraltde]jenfraltde[/url]
#Attach a 2 foot piece of hose to the end.
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[link=http://www.livejournal.com/interests.bml?int=jenfraltde]jenfraltde[/link]
#Start the engine and let it warm up a bit.
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kobrolbugnbr http://veraltropof.livejournal.com/1171.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://veraltropof.livejournal.com/1171.html">kobrolbugnbr</a>
#If the engine smooths out or revs up a bit, you have found your leak.
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[url=http://veraltropof.livejournal.com/1171.html]kobrolbugnbr[/url]
 
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[link=http://veraltropof.livejournal.com/1171.html]kobrolbugnbr[/link]
Hold bottle UPRIGHT during testing as liquid propane may run out of an inverted bottle.
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golcenhut http://www.livejournal.com/interests.bml?int=golcenhut
 
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<a href="http://www.livejournal.com/interests.bml?int=golcenhut">golcenhut</a>
PLEASE do this in a well ventilated area due to propane gas and exhaust fumes!!
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[url=http://www.livejournal.com/interests.bml?int=golcenhut]golcenhut[/url]
 
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[link=http://www.livejournal.com/interests.bml?int=golcenhut]golcenhut[/link]
=Carburetor cleaner method=
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zarfipas http://lazverrel.livejournal.com/517.html
#With the car running, using a can of carburetor cleaner spray down the hoses and vacuum connections.
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<a href="http://lazverrel.livejournal.com/517.html">zarfipas</a>
#Notice a change in the running of the engine and you might have found your leak.
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[url=http://lazverrel.livejournal.com/517.html]zarfipas[/url]
 
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[link=http://lazverrel.livejournal.com/517.html]zarfipas[/link]
[[Category:Engine]]
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Revision as of 13:44, 24 April 2009

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