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Re: [oletrucks] vapor lock remedies

To: bkn6@airmail.net, oletrucks@autox.team.net
Subject: Re: [oletrucks] vapor lock remedies
From: EEHodges@aol.com
Date: Wed, 26 Jul 2000 12:24:14 EDT
I had a similar problem with my 216 and boiled-out gas tank. It wasn't 
however, temperature related.  I'm assuming your gas tank is under the bed 
like my '48. The pick-up tube runs at an angle from about 1/2 way up the 
front of the tank. When I first got mine running again it would run for just 
a few seconds and quit. Trouble ended up being hole(s) in the pick-up tube. 
It would pump enough gas to start (or from gas I primed the intake with) but 
wouldn't run. 

This doesn't fully explain why your problem is intermittant unless you are 
close to 1/2 full and the level is dropping below a hole in the pick-up tube 
just "sometimes." 

Anyway, I'd check it out with a full tank of gas. My solution was to fab a 
pick-up for the drain hole - took a fitting and braised a short 1/4" or so 
tube so I wouldn't be pumping off the very bottom of the tank. (The pick-up 
tube comes a little off the bottom anyway)

Good luck,

Emory Hodges
48 Chevy 3/4 ton "Rack"

In a message dated 7/26/2000 10:54:23 AM Eastern Daylight Time, 
bkn6@airmail.net writes:

<< Yesterday afternoon I experienced what I assume was vapor lock.
 The wife and I drove approximately 25 miles on the freeway (60-65 mph),
 and as soon as we got off on the side streets and slowed down the engine
 quit. After it sat for a couple of minutes it fired back up, then would
 die again after a couple of minutes. We finally got to where we were
 going, it sat a couple of hours, and we were able to drive home with no
 problem. This morning after driving approximately 5 miles it did it
 The temps yesterday afternoon were in the mid to upper 90's, with the
 humidity being somewhere in the 65-70% range. Last night on the return
 trip the temps were in the low 80's, as they were this morning when it
 happened again. I'm running a stock 216, and the truck has just recently
 been completely (frame off) restored. The fuel tank was vatted and
 sealed, I have 2 inline filters, and the fuel lines are run where they
 were originally.
 What do ya'll think; does this sound like vapor lock, and if so, is
 there a sure fire way to prevent it from happening again? My neighbor
 tells me that when it gets hot (a constant here in Texas), that vapor
 lock pretty much becomes a common occurrence on these old trucks when
 speed is mixed with heat and humidity. Does that sound right?
 Thanks for any help.
 Brad Newman
 49 3100 Deluxe
 24 1 ton
 Coppell, Texas
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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