Finding vacuum leaks

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-Here's a method for diagnosing a bad running engine that may have a vacuum leak:
+{{youcanedit}}
+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".
+=Propane method=
 #Get a soldering Propane tank and valve attachment.
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 PLEASE do this in a well ventilated area due to propane gas and exhaust fumes!!
+=Carburetor cleaner method=
-Another method:
 #With the car running, using a can of carburetor cleaner spray down the hoses and vacuum connections.
 #Notice a change in the running of the engine and you might have found your leak.
+[[Category:Engine]]
-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".

Revision as of 00:03, 31 March 2008