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GMC V6 and V12 Engines Engine repair and rebuilding |
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#11
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Re: 1966 And Later Fuel Pumps
makes sense to me, my 66 is on it's 3rd fuel pump in 5 years. probably around 1500 to 2000 miles. i don't know what gears are in the rear axle, but i have fairly tall tires, 60 mph is really turning engine, 3400 rpm. after last time pump went out, i bought an extra, and carry it behind the seat. i thought about an electric pump, has any put one on our trucks? would prefer in tank, don't know if that is available.
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#12
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Re: 1966 And Later Fuel Pumps
FWIW, my '67 has needed 1 fuel pump in the last 12 years.
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#13
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Re: 1966 And Later Fuel Pumps
About how many miles before and after your pump replacement? Correct me if I’m wrong, the ‘67 has the bent arm with larger diameter body?
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#14
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Re: 1966 And Later Fuel Pumps
O’Reillys has inline electric pumps by Edelbrock for less than $50. I’m assuming the low PSI one would be sufficient since I still have my tank behind the seat (gravity fed) and I’m still running the stock carb. If I get one I was thinking of mounting it just downstream of the stock fuel filter on the passenger frame.
I have heard these older motors typically start easier with electronic fuel pumps. |
#15
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Re: 1966 And Later Fuel Pumps
Quote:
I had installed a back-up electric pump on a '66 pickup I used to own (which Clyde in SC has now). It saved my bacon one time when I was driving in heavy traffic on Interstate 5 up in Washington. The engine driven pump quit all of a sudden. After a moment of panic I remembered to switch on the electric pump. Thankfully the engine fired right back up with nobody behind me honking!
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 |
#16
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Re: 1966 And Later Fuel Pumps
Quote:
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#17
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Re: 1966 And Later Fuel Pumps
Sounds like your memory is better than mine, David! I had forgotten about that. Fortunately I never experienced any vapor lock when I drove it from Wichita to Medford in 2014.
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 |
#18
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Re: 1966 And Later Fuel Pumps
My airtex 40050 is bent arm with 5/16 fitting works great on my 351e
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#19
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Re: 1966 And Later Fuel Pumps
A few thousand. No idea how old the pump was when I put it on, it looked like old stock that had been laying around. Yes, large diameter with the bent arm.
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#20
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Re: 1966 And Later Fuel Pumps
i still had my old pump laying on the bench from this summer when it went bad. i decided to take it apart, and see what went wrong. one of the check valves fell out. i was driving at hiway speed, i think the vibration from 3400 rpm probably vibrated the valve from it's seat in the pump. diaphram looked excellent. looks like manufacturer defect, should have been staked in.
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