1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

I found my vapor lock issue!

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  #1  
Old 10-15-2013, 11:05 AM
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I found my vapor lock issue!

So I had yesterday off (today too for that matter) & was cruising around in the brass monkey & thought it would be fun to go in for an oil change at the local jiffy spot.

I had a great time hanging with the guys there talking about the truck.

They let me climb into the pit & take a good look at the belly of my truck!

In the parade about 2 weeks back the truck performed almost perfectly, but after an hour of idle speed pulling a float she died. Started up again but then died. Luckily it was at the very very end of the parade when we were pulling back into the parking lot.

So thanks to the jiffy shop guys I was able to get this cool picture.

Sorry its sideways.

I'll give you 3 guesses what that silver canister is right next to the exhaust pipe!!

I think the quickest & easiest way to fix this is to get a roll of muffler wrap & put a couple layers of asbestos between my exhaust & my fuel line!

I'm looking for an exhaust guy who will re-route the exhaust too. I have TONS of room under the truck & the exhaust takes up it ALL.

Oh by the way - I ordered the alternator bracket off of ebay. Should be here in a week or so.
 
  #2  
Old 10-15-2013, 12:00 PM
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Nothing like a good look at the problem. Just a question, wouldn't the wrap just hold the heat?
 
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Old 10-15-2013, 12:11 PM
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Quickest easiest way is to cut a grapefruit and stick it on it- smells after a while but is a great insulator !!
 
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Old 10-15-2013, 12:12 PM
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Looks like a fuel filter to me.
 
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Old 10-15-2013, 12:27 PM
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Wrap gets very hot (I have it on my motorcycle exhaust)and I don't think it would fix the problem. Best fix I think would be to move the filter. Otherwise put a sheet metal shield over it on the frame so there is air flow behind it. You can even use a self adhesive insulator fiber (Summit Racing sells it cheap, I use it on my leather bags over my bike exhaust) and that would also help keep the heat away.
 
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Old 10-15-2013, 12:57 PM
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Originally Posted by truckeemtnfords
... Otherwise put a sheet metal shield over it on the frame so there is air flow behind it. ...
That's the ticket! It's radiant heat from the exhaust, and shiny metal reflects that. Nothing fancy needed, might want to go to the boneyard and find a piece of factory heat shield that is aluminized or at least galvanized -- shiny.
 
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Old 10-15-2013, 01:11 PM
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I agree with the mindset of moving any fuel related lines away from the heat source. But heck! you know exactly where the problem is, now its just a matter of correcting it. Congratulations on resolving a nagging problem.
 
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Old 10-15-2013, 02:19 PM
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May be more work but I would go with the re-routing of the exhaust. Looks like you have a few lines in this location the heat can get to including the brake lines. Plus if you every have a fuel leak at this location it may not be very safe with a ignition source so close.
 
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Old 10-15-2013, 02:58 PM
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I vote for a shield between the filter and the exhaust Aluminum is so easy to work. Just make sure it does not vibrate.
 
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Old 10-15-2013, 03:00 PM
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Even if the gas line leaks, the vapors without a spark won't ignite without heating up to about 475 F. I doubt your exhaust pipe gets that hot ever. But, if you have a gas leak anywhere, it is decidedly unsafe, with or without a spark.
 
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Old 10-15-2013, 03:21 PM
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I have some scrap stainless I can use as a shield. It should go in easy & look sharp too.
 
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Old 10-15-2013, 03:23 PM
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Yes, go to your friendly DIY store or salvage yard and buy a piece of 1/16" to 1/8" aluminum sheet or angle about 6x12 (sheet) or 2 x 4 x 12 (angle). bend the sheet into a 2x4x12 L shape, slip the 2" leg inside the lower frame flange centered on the filter and bolt to the frame making sure the filter is not touching the aluminum, you want air space around it and air to be able to pass the length of the shield. That should solve your heat problem. Don't wrap the pipe, just makes it a larger radiator.
Stainless isn't as good a heat conductor as aluminum, but should work as above if you leave 1/2" air space between it and the filter.
 
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Old 10-15-2013, 05:06 PM
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Originally Posted by AXracer
...
Stainless isn't as good a heat conductor as aluminum, but should work as above if you leave 1/2" air space between it and the filter.
You don't want a good conductor, otherwise it will re-radiate on the fuel filter side. Think if you put a piece of wood there, it would block almost 100% of the heat.

Actually the best thing would be to make a shield that hose-clamps onto the exhaust pipe with a 1/2" air gap. Look at the heat shields on motorcycle exhausts, they only have a 1/4" air gap and you can lay skin against them (for a while).
 
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Old 10-15-2013, 11:47 PM
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If you use 1/8" aluminum bolted tight to the frame with air space around it the aluminum would conduct it's heat to the frame rather than re-radiate it. That why good SS cookware is 2 shells with a layer of aluminum in the center, and cheap solid SS pans burn.
 
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