Posted by Owen Aaland on August 12, 2009 at 11:47:12 from (65.174.247.87):
In Reply to: Vapor lock posted by Allan In NE on August 11, 2009 at 08:50:36:
Allan In NE said: (quoted from post at 08:50:36 08/11/09) Nancy,
It is an arbitrary term that means, "I can't figure this thing out".
I've been turning wrenches the better part of 60 years and have yet to run into a case of ACTUAL vapor lock. It is often used just as an excuse. :>)
Allan
Allan, I have been involved with quite a few cases of fuel vaporization problems. The most spectacular was on an 1800 international truck with a 478CID engine. On hot days when running under light to moderate loads the fuel would vaporize in the fuel line before it got to the fuel pump causing the engine to run lean. Unfortunately that engine had a very bad habit of blowing the mufflers apart when that happened. The problem was solved by installing an electric pump back on the frame and rerouting the fuel line on the outside of the frame and not using the mechanical pump on the engine.
Another one that has a less successful ending was an I-574 with a loader on it. When baling hay it would start to miss and shear the bolt in the baler flywheel. Insulating the fuel line and rerouting it away from the engine helped but the owner decided to work with it that way rather than remove the loader which he used almost daily. He should have used your solution and gotten more tractors !
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