Engine/Transmission (1994 - 1998) Deleting fuel heater completely

[Smills]

Does anybody know the size pipe thread on the lift pump inlet line that comes off the fuel heater. I want to take the fuel heater completely off the truck and simplify the the fuel lines.

 

[Joe G.]

It's probably a good idea to remove the fuel heater from the assembly and keep the prefilter. It protects the lift pump. That's simple to do. Use a 17mm socket to remove the pre-filter and an 8mm allen wrench to remove the fuel heater. Then the pre-filter will bolt right up without the fuel heater.

 

[Smills]

That is what I wanted to do. I might just run an aftermarket prefilter instead of the stock prefilter just to get rid of some clutter down there.

 

[Joe G.]

Actually the stock setup will take less room than an aftermarker pre-filter. The stock pre-filter mounts on the same two screws that the lift pump does.



If you would like a copy of my write up about the fuel system e-mail me at -- email address removed -- It has a picuture of the fuel heater/pre-filter assembly without the fuel heater.

 

[Smills]

Thanks I just got that write up from you it has helped.

 

[Vaughn MacKenzie]

JIC Adapter

Lift pump inlet is 3/8" pipe thread. When I ran -8AN lines to the lift pump on my '96 I used a 3/8" to JIC fitting, looks pretty much like this one.

 

[Smills]

Lift pump inlet is 3/8" pipe thread. When I ran -8AN lines to the lift pump on my '96 I used a 3/8" to JIC fitting, looks pretty much like this one.

Thanks that helps know can get the parts ahead of time.

 

[CogginsP]

I finally got around to removing my fuel heater today... looked completely fine, doesn't look like it had any air leaks in it whatsoever (130K miles). Do I need to worry about the fuel temp pickup? I just kind of left it hanging there when I unplugged it from the heater. Anything to worry about there??

 

[Joe G.]

You can't see an air leak. When my fuel heater failed it looked great until I drilled out the rivets and looked inside. When I submerged the whole mess in a bucket of water and put some air to it there were a LOT of bubbles from the electrical connector. Even after I knew where to look I could not see the leak unless bubbles were coming out of it. You can remove the temp sensor. Just two little torx screws hold it in place. It's not in a hole. That's a depression in the metal, no hole. The harness to the fuel heater is pretty short. You can unplug it from the main harness.

 

[Jim Fulmer]

Right now I run a 6AN line from the stock filter housing to the pump. What I want to do is ditch the stock filter and run a 6AN line from the stock lift pump to a fleetguard housing with a Racor filter (2 micron)



What is the thread size coming put of the pump? 5/8th's flare to a 6 AN!



Jim