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Fuel Tank Heater?
09-06-2009, 09:31 PM
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#1
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Senior Member
Pond Piggies Club Mid Atlantic Campers
Join Date: Jan 2000
Location: Pittsburgh, PA, USA
Posts: 880
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I was underneath the GMC today looking at how everything was arranged/constructed when I noticed a box about an inch away from the front end of the fuel tank that looked like it could be a small radaitor, possibly to help heat the fuel tank during cold weather. There are two metal pipe lines connected to the box. I didn't have anything like this on my 96 PSD. The only fuel heater I was ever aware of it having was electric and located in the bottom of the canister that holds the fuel filter (I know because I had to replace the heater once).
I searched the Diesel Place but didn't find anything.
So, is this GM's solution to heating the fuel in winter?
If this isn't a heater, then what is it?
__________________
2009 GMC Sierra 2500HD | Crew Cab | Standard Box | 4WD | Duramax/Allison
2000 Jayco Eagle 266 | FBS | TT
1986 Coleman Laramie pop-up -- Still in the family!!!
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09-20-2009, 09:52 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 4,849
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Now you've got me curious. I never knew about this, so tomorrow I'll be under my dually looking for that box. There is another website dedicated to Duramax trucks: http://www.duramaxforum.com/forum/index.php.
__________________
"As nightfall does not come at once, neither does oppression. In both instances there is a twilight where everything remains seemingly unchanged. And it is in such twilight that we all must be aware of change in the air - however slight - lest we bec
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09-21-2009, 06:05 PM
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#3
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Senior Member
Pond Piggies Club Mid Atlantic Campers
Join Date: Jan 2000
Location: Pittsburgh, PA, USA
Posts: 880
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Hi, Ray:
Why wait for tomorrow? I wiggled under the truck this evening and took photos from various angles. I think this one might be the best of the bunch as it shows the fuel tank, the little radiator and the air gap between them. The two metal tubing lines from that radiator run along the inside of the frame towards the front of the truck. I have not yet traced where they go.
Hope this helps.
__________________
2009 GMC Sierra 2500HD | Crew Cab | Standard Box | 4WD | Duramax/Allison
2000 Jayco Eagle 266 | FBS | TT
1986 Coleman Laramie pop-up -- Still in the family!!!
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10-20-2009, 03:01 AM
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#4
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Senior Member
Excel Owners Club
Join Date: Jan 2008
Location: Western Canada
Posts: 118
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Hello what you see before your fuel tank is the cooler that cools the fuel returning from the engine before entering the fuel tank. Its is unused fuel coming back from the injectors and the fuel is hot so they cool it down.
__________________
2005 GMC 2500 HD Duramax Diesel Allison Trans. Banks Electronic Exhaust Speed Brake,Banks Cold Air Intake & 4 inch Exhaust, Sway bar, Air Bags.
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10-24-2009, 09:49 PM
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#5
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 4,849
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Frank, I found out the fuel heater is in the fuel filter housing, left of the primer cap.
__________________
"As nightfall does not come at once, neither does oppression. In both instances there is a twilight where everything remains seemingly unchanged. And it is in such twilight that we all must be aware of change in the air - however slight - lest we bec
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05-04-2011, 11:12 AM
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#6
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Junior Member
Join Date: May 2011
Location: Indianapolis, IN
Posts: 8
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Correct on both accounts; the fuel heater is in the filter mount block and the "radiator" thing in front of the tank is the fuel cooler.
Interestingly enough, the new LML Dmax engines do not have the fuel cooler. Makes one wonder if it's not needed, or not effective ...
__________________
2006 Cherokee Lite 18DD
2006 Chevy 3500HD 4x4 CCLB W/T with Duramax/Allison 1000 (all stock performance wise; heavy on reliability mods)
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