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-   -   FC fuel pump & water pump (https://www.wanderlodgeownersgroup.com/forums/showthread.php?t=7326)

78bbird 08-08-2010 01:03 PM

FC fuel pump & water pump
I have only seen fuel pumps rated for gas and none say for diesel, can you use a pump for either? Also see coolant leaking from lower bolt of water pump. Does this mean a new water pump? 78 FC, 3208 Cat.

Bill Pape 08-11-2010 08:29 PM

Mark, No Answer................

I have seen gas filters used on diesel, but have no real knowledge , this may be a question for Facet-Purolator fuel pump.


If the water pump is leaking, even it were a gasket, it needs to be removed, I would plan on a new water pump especially if it is original,
Water pumps wear out ,leak and eventually become a maintenance issue only four bolts easy if you are already doing other work behind the radiator.

78bbird 08-12-2010 11:07 AM

Thank you Bill; I am putting together a list for work on the front end of the Cat 3208. Like belts, hoses, water pump, Idler pulley, And power steering leak. From what I have read here I would need to remove the radiator, AC cooler, bumper, & front doors.

GregOConnor 08-12-2010 11:31 AM


Originally Posted by 78bbird (Post 68295)
I have only seen fuel pumps rated for gas and none say for diesel, can you use a pump for either? Also see coolant leaking from lower bolt of water pump. Does this mean a new water pump? 78 FC, 3208 Cat.

the confusion is between diesel injection pumps aprox $3,000 and liftpumps $100.00 then there are high pressure electric fuel pumps for gas injection systems on newer cars $250.00

a lift pump supplies fuel to the injection pump. not all diesel engine designs require a lift pump to provide a constant supply when the injection pump will also draft head pressure. a lift pump can also simply push gas to a gas carburetor.

Diesel fuel must be spayed in the cylinder with high pressure over 1,000 psi and requires the expensive injector pumps and timing. diesel injector pumps are located on the engine and I have never seen a battery operated one.

Gas fuel injectors like throttle body injection system can run off of pumps as low as 100 psi and are usulay electric. many gas delivery electric injection pumps can run without a lift/supply pump because they are located in the tank. this is where new car fuel lines are hard plastic or steel and the old style gas fuel lines are no good for the 100 psi containment.


MRPutz 08-12-2010 11:33 AM

Mark, Just my opinion but I'd think that any pump that can handle gasoline can handle diesel. Gas is much more volatile. ;) I'm curious, is this for a rear transfer pump? I have not seen one on my bus :confused:

78bbird 08-12-2010 04:11 PM

I read here some one put a electric pump at the rear of their FC and it helped the engine run better. I had just got a new electric pump for my gas generator and read the instructions and noted it did not refer to anything but gas. Just wanted to ask the group as some have used different types of pumps. So is this something I want to get into? I just found the coolant leak and will be working on the engine anyway.

Bill Pape 08-12-2010 05:06 PM

BB installed a Facet fuel pump with the 3208's starting in the early 80's

Facet # 40109 available at NAPA, it was installed just forward of the rear fuel tank high up on a frame support.


Jim Harvie 08-12-2010 07:04 PM

If I was installing a "Lift Pump", I'd make sure that I got one with an inlet port that's no less than 3/8 Dia.
When the Injector pump calls for more fuel, that fuel has to pass through the Lift Pump, and if the port isn't large enough, the system will starve for fuel.
Not sure about those 50 dollar universal pumps that only put out 5 lbs of fuel pressure. I'd think I'd want a little more than that.

rwoody 08-12-2010 07:24 PM

5lb is great if you have it all the time under full throttle

most of them pumps are not setup for the fuel rate we require as jim said...

i got a holley blue pump(95 gal per hr) on my sp with 1/2 lines and its mounted after the filter

when i get 10 inch of vacuum on the filter its stopped up~!

Jim Harvie 08-12-2010 07:51 PM

I know it's best to push fuel, than pull, but if I was going to install one, I think I'd eliminate my hand primer, and mount it there

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