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Old 12-02-2017, 08:57 PM   #1
emil77
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Leaking Fuel Pump - Easy to replace?

The fuel pump on my 72 C20 is leaking, 5.7 V-8. Is this an easy thing to change or am I going to get in over my head? Will gas leak all over me when I change it? Any tips/tricks/comments?
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Old 12-02-2017, 09:32 PM   #2
rob32472
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Re: Leaking Fuel Pump - Easy to replace?

Easy to change. Lots of Vids on you tube. You will most likely get some fuel on your hands, but nothing major.
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Old 12-02-2017, 09:33 PM   #3
emil77
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Re: Leaking Fuel Pump - Easy to replace?

I bought the 3 line fuel pump for a 5.7 350 V-8, that's correct?
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Old 12-02-2017, 10:34 PM   #4
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Re: Leaking Fuel Pump - Easy to replace?

For a 72? Or California truck? Mine is just a 2, in and out. Mine is a 70. Just crimp the fuel line coming out of the cab with a pair of vise grips. Should stop the flow. Make sure you get the gasket in, and the pushrod goes back in the way it came out.
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Old 12-02-2017, 10:56 PM   #5
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Re: Leaking Fuel Pump - Easy to replace?

Sometimes the pushrod will try to fall out. Some guys use a dab of grease to hold it for the few seconds it takes to get the pump in place. If that doesn't work, most blocks have a tapped hole on the front you can run a bolt into that will hold the rod in place while you get the pump tightened in. Just don't forget to remove that bolt afterward.
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Old 12-03-2017, 12:29 AM   #6
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Re: Leaking Fuel Pump - Easy to replace?

Be sure and check the engine oil for over filled from fuel entering crankcase. Check to see how the oil smells.
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Old 12-03-2017, 12:43 AM   #7
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Re: Leaking Fuel Pump - Easy to replace?

Is your original fuel pump mechanical?

Mine was mechanical and it was a breeze. I removed it, cleaned the old gasket area with sandpaper, cleaned that residue off, and used a Carter replacement (mechanical) pump with new gasket.

I tightened the bolts back in a little bit on each one to get the thing to seat all over instead of tightening down one bolt and then the other.

I watched videos on the process but didn't need to glue the thing down at all. I think mechanical pumps are the way to go.
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Old 12-03-2017, 02:55 AM   #8
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Re: Leaking Fuel Pump - Easy to replace?

Changing a fuel pump will raise your confidence level as a mechanic, that's for sure. Very easy to replace.
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Old 12-03-2017, 02:59 AM   #9
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Re: Leaking Fuel Pump - Easy to replace?

Thanks for the info y'all, I'll be doing it Monday with the help of a mechanic friend.
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Old 12-03-2017, 03:00 AM   #10
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Re: Leaking Fuel Pump - Easy to replace?

Quote:
Originally Posted by toolboxchev View Post
For a 72? Or California truck? Mine is just a 2, in and out. Mine is a 70. Just crimp the fuel line coming out of the cab with a pair of vise grips. Should stop the flow. Make sure you get the gasket in, and the pushrod goes back in the way it came out.
I guess it's a California truck, I have 3 connection pump.
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Old 12-03-2017, 05:46 AM   #11
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Re: Leaking Fuel Pump - Easy to replace?

I guess California has been more complicated for a long time then.

So you don't just have a mechanical pump on the side of our engine like my 250 does? *Mine is at 9 O'Clock in the pic, the brass-looking round thing.
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Old 12-06-2017, 02:52 PM   #12
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Re: Leaking Fuel Pump - Easy to replace?

I swapped it out Monday night, pretty cool experience! I now know what it feels like to have gas drain on you, haha!
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Old 12-06-2017, 02:55 PM   #13
emil77
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Re: Leaking Fuel Pump - Easy to replace?

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Originally Posted by In The Ten Ring View Post
I guess California has been more complicated for a long time then.

So you don't just have a mechanical pump on the side of our engine like my 250 does? *Mine is at 9 O'Clock in the pic, the brass-looking round thing.

Not sure, mine had 3 lines. One is fuel return, one from gas tank and one is that line that comes up into the engine, carb I think?
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Old 12-06-2017, 05:51 PM   #14
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Re: Leaking Fuel Pump - Easy to replace?

Quote:
Originally Posted by In The Ten Ring View Post
I guess California has been more complicated for a long time then.

So you don't just have a mechanical pump on the side of our engine like my 250 does? *Mine is at 9 O'Clock in the pic, the brass-looking round thing.
Yeah, but yours is upside down!

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Old 12-06-2017, 06:00 PM   #15
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Re: Leaking Fuel Pump - Easy to replace?

I went to all the trouble of reaching over my grill and down into the engine bay to change out mine only later to remove the entire front end.........
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