Fuel leak

Bandit · 07-12-2008, 09:43 PM

When after I finished putting on my new fuel filter 2 nights ago I noticed I had a small puddle of fuel on my driveway, so today I went to take a look and Its leaking on the driver side above the starter but below the filter, right on or very near where the fuel transfer pump is, i can't see it from the top and the starter blocks my view from below. Anyone have an idea of this? I'm going to take the starter off tmr and take a look see.

__________________

>>>Mace<<<

94' 2500 12V "modified"

Dual K20s · 07-12-2008, 10:12 PM

It might the fuel heater or the lift pumps o-rings have gone out.

The heater is just above the fuel pre-filter screen, and is worthless, so just take the pre-filter houwing off (17mm?) then use an allen key and take the heater out. The pre-filter will screw back in without it.

If its the lift pump, I think it will be easiest to just buy a new one. I hear Cummins sells them for around $90. And there may be a high output on availble from a different application, but the stock filter might not flow enough anyways.

And read this:
Joe G's fuel system writeup

__________________
98 Dodge 2500 Motor: 12 valve, BD exhaust brake, 4" turbo back exhaust, BHAF, KDP tabbed, 4K GSK, O-ringed head, .020 over HG, Modified AFC, DDP Stage 3 injectors, DDP DVs, 17.5* timing, 16cm^2 ex. housing Drivetrain: 5-speed 4x4 w/ SB clutch (13" OFE 450Hp)

Bandit · 07-12-2008, 10:33 PM

Well the heater is a bit dirty, but dry. I will take it apart and clean it tmr, the leak seems to be coming from the pump area, but i can't see it better until the starter comes off, if its a line (hopefully) i can make another one, same with a gasket.

__________________

>>>Mace<<<

94' 2500 12V "modified"

95 SLT · 07-13-2008, 12:43 AM

I've had lot's of problems with this in the past. It may be the water drain cock at the bottom. Sometimes the O-ring does not seat properly.

Another is the canister itself. I have had leaks at the rims that are crimped over and one filter actually spun where it was crimped.

You may have to chuck that one.

Protect your starter............the fuel will sack it out.

__________________
'95 12V, super cab 4x4, BHAF, 400,000 +mi. pac brake, KDP retainer done, #10 fuel plate, boost elbow, DDS stabalizer, 215 Bosch injectors.
Now I have a Truck.

Bandit · 07-13-2008, 01:06 PM

I had the engine running when i was watching the leak and it is not coming from the filter (although that was my first suspicion), the fuel runs down the side of the engine/oil pan, this is no fun.

__________________

>>>Mace<<<

94' 2500 12V "modified"

Dual K20s · 07-13-2008, 03:07 PM

from above the lift pump?

can you see if the supply or return lines are in good shape?

Bandit · 07-13-2008, 09:47 PM

Well after a closer in depth look the leak is coming from the pump itself at it's base, perhaps the gaskets? I will order a new rubber hose, both gaskets and a new pump (hopefully not a pricey item?) and will clean the heater throughly this week at the same time.

__________________

>>>Mace<<<

94' 2500 12V "modified"

illflem · 07-14-2008, 08:59 AM

Quote:

hopefully not a pricey item?

Best price by far is from Cummins, about $70 for the pump.

__________________
Bill
'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Both far from stock

Bandit · 07-14-2008, 01:07 PM

Hmmmm really, more like 340 bones.

__________________

>>>Mace<<<

94' 2500 12V "modified"

07-12-2008, 09:43 PM	#1 (permalink)
Bandit TECH SPECIALIST Join Date: Jun 2008 Location: Edmonton, Alberta, Canada Posts: 653 Bandit's Truck Pics	Fuel leak When after I finished putting on my new fuel filter 2 nights ago I noticed I had a small puddle of fuel on my driveway, so today I went to take a look and Its leaking on the driver side above the starter but below the filter, right on or very near where the fuel transfer pump is, i can't see it from the top and the starter blocks my view from below. Anyone have an idea of this? I'm going to take the starter off tmr and take a look see. __________________ >>>Mace<<< 94' 2500 12V "modified"

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07-12-2008, 10:12 PM	#2 (permalink)
Dual K20s Tech Specialist Join Date: May 2007 Location: Ferndale CA/San Luis Obispo CA Posts: 1,303 Dual K20s's Truck Pics	It might the fuel heater or the lift pumps o-rings have gone out. The heater is just above the fuel pre-filter screen, and is worthless, so just take the pre-filter houwing off (17mm?) then use an allen key and take the heater out. The pre-filter will screw back in without it. If its the lift pump, I think it will be easiest to just buy a new one. I hear Cummins sells them for around $90. And there may be a high output on availble from a different application, but the stock filter might not flow enough anyways. And read this: Joe G's fuel system writeup __________________ 98 Dodge 2500 Motor: 12 valve, BD exhaust brake, 4" turbo back exhaust, BHAF, KDP tabbed, 4K GSK, O-ringed head, .020 over HG, Modified AFC, DDP Stage 3 injectors, DDP DVs, 17.5* timing, 16cm^2 ex. housing Drivetrain: 5-speed 4x4 w/ SB clutch (13" OFE 450Hp)

07-12-2008, 10:33 PM	#3 (permalink)
Bandit TECH SPECIALIST Join Date: Jun 2008 Location: Edmonton, Alberta, Canada Posts: 653 Bandit's Truck Pics	Well the heater is a bit dirty, but dry. I will take it apart and clean it tmr, the leak seems to be coming from the pump area, but i can't see it better until the starter comes off, if its a line (hopefully) i can make another one, same with a gasket. __________________ >>>Mace<<< 94' 2500 12V "modified"

07-13-2008, 12:43 AM	#4 (permalink)
95 SLT Cummins Enthusiast Join Date: Dec 2007 Location: B.C. Can. Posts: 246 95 SLT's Truck Pics	I've had lot's of problems with this in the past. It may be the water drain cock at the bottom. Sometimes the O-ring does not seat properly. Another is the canister itself. I have had leaks at the rims that are crimped over and one filter actually spun where it was crimped. You may have to chuck that one. Protect your starter............the fuel will sack it out. __________________ '95 12V, super cab 4x4, BHAF, 400,000 +mi. pac brake, KDP retainer done, #10 fuel plate, boost elbow, DDS stabalizer, 215 Bosch injectors. Now I have a Truck.

07-13-2008, 01:06 PM	#5 (permalink)
Bandit TECH SPECIALIST Join Date: Jun 2008 Location: Edmonton, Alberta, Canada Posts: 653 Bandit's Truck Pics	I had the engine running when i was watching the leak and it is not coming from the filter (although that was my first suspicion), the fuel runs down the side of the engine/oil pan, this is no fun. __________________ >>>Mace<<< 94' 2500 12V "modified"

07-13-2008, 03:07 PM	#6 (permalink)
Dual K20s Tech Specialist Join Date: May 2007 Location: Ferndale CA/San Luis Obispo CA Posts: 1,303 Dual K20s's Truck Pics	from above the lift pump? can you see if the supply or return lines are in good shape?

07-13-2008, 09:47 PM	#7 (permalink)
Bandit TECH SPECIALIST Join Date: Jun 2008 Location: Edmonton, Alberta, Canada Posts: 653 Bandit's Truck Pics	Well after a closer in depth look the leak is coming from the pump itself at it's base, perhaps the gaskets? I will order a new rubber hose, both gaskets and a new pump (hopefully not a pricey item?) and will clean the heater throughly this week at the same time. __________________ >>>Mace<<< 94' 2500 12V "modified"

07-14-2008, 01:07 PM	#9 (permalink)
Bandit TECH SPECIALIST Join Date: Jun 2008 Location: Edmonton, Alberta, Canada Posts: 653 Bandit's Truck Pics	Hmmmm really, more like 340 bones. __________________ >>>Mace<<< 94' 2500 12V "modified"