What's this fuel line gizmo? - Diesel Forum - TheDieselStop.com
6.9L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

 
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post #1 of 8 (permalink) Old 11-23-2010, 10:19 PM Thread Starter
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What's this fuel line gizmo?

I have an 84 e350.
Between the fuel pump and the filter there is a section of the line that's about an inch across and it has a wire coming from it.
It's not shown in my repair manual. My guess is it's a line heater.

I'm asking because I'm about to remove the mechanical fuel pump and switch to two electric pumps down on the frame and I'd like to know if I need that thing.
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post #2 of 8 (permalink) Old 11-23-2010, 10:27 PM
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You win....... You guessed right......
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post #3 of 8 (permalink) Old 11-24-2010, 01:04 AM
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And no, you don't need it.
Why 2 pumps on the frame? WVO?
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post #4 of 8 (permalink) Old 11-24-2010, 09:43 AM Thread Starter
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Quote:
Originally Posted by Evel486 View Post
.........
Why 2 pumps on the frame? WVO?
Hawgman said it pretty well:

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Originally Posted by hawgman View Post
You win....... You guessed right......


Each pump came with a check valve so I won't have to worry about a fuel selection valve on the sending side of the system.

Last edited by longwolf; 11-24-2010 at 09:47 AM.
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post #5 of 8 (permalink) Old 11-24-2010, 10:15 AM
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Do you need a fuel heater?

You don't say where you live or drive.

If you ever drive in the cold and you don't mind sitting on the side of the road waiting for the filter to un-gel, then no you don't need the fuel heater.

Hawgman, I had a kenworth gel up just north of Houston one-time, you might want to reconsider not needing a fuel heater. Same trip in the same truck also gelled up in southern Mississippi, the Florida pan-handle, Tennessee and Oklahoma. It was a cold trip.

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post #6 of 8 (permalink) Old 11-24-2010, 06:04 PM
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I know if you bend it it will catch on fire, I have a new one but I havent replaced it yet, ive seen about 20 degree nights and I havent had a problem yet, but I plan on changing it here real quick

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post #7 of 8 (permalink) Old 11-24-2010, 09:34 PM Thread Starter
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Quote:
Originally Posted by Joe Mc View Post
........

If you ever drive in the cold and you don't mind sitting on the side of the road waiting for the filter to un-gel, then no you don't need the fuel heater.
.........
I live near Dallas, but I travel sometimes.

But you're saying the point is to heat the filter, so I guess the thing to do is move the heater down to the frame just before the new diesel filter and/or pump.
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post #8 of 8 (permalink) Old 11-25-2010, 01:33 AM
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Fuel heaters are federally mandated on automotive diesels. Their purpose is to heat gelled fuel enough to pass through the filter so you can start the engine. I've never actually seen one do this.
I live in northwestern Canada and tonite it's -25. Many, many diesel owners around here have their fuel heaters disconnected permanently. If you live in an area that doesn't winterize diesel you can protect yourself much better by adding an anti-gel to your fuel.
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