C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Fuel Pump: How Often Should This Be Replaced?

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Old Mar 29, 2005 | 08:35 AM
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Default Fuel Pump: How Often Should This Be Replaced?

As a matter of preventative maintenance, how often should our fuel pumps/socks be replaced? Is this mileage, time-related, or both?
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Old Mar 29, 2005 | 08:42 AM
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Good question, I'd just say change it whenever you need to change the fuel pump.I don't think I've ever read where it was considered a scheduled maintenance item.And quite honestly, with 103,600 on my 87, I'm not sure anyone ever even replaced the fuel pump prior to my ownership-at least it looked original.
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Old Mar 29, 2005 | 11:27 AM
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Originally Posted by bradvette
Is this mileage, time-related, or both?
Neither, strictly. It is more "conditions" related. Dirty fuel will plug up the sock and the filter. Either causes the pump to work harder and run hotter, especially the filter. Fuel is the pump's coolant. The more the car is run low on fuel, the shorter the pump life. The severity if these conditions and in varying combinations stack up to make the fuel pump life unpredictable. A simple pressure test under maximum demand will foreshadow a weakening pump. On the other hand, sometimes they don't give warning.

RACE ON!!!
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Old Mar 29, 2005 | 11:33 AM
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sounds logical, and thanks for the info.
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Old Mar 29, 2005 | 11:46 AM
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Anyone have a PN on the sock? I know my 89 has a newer pump, but judging by the way the former owner repaired other items I doubt the sock was replaced unless the pump came with it..
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Old Mar 29, 2005 | 11:47 AM
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i would say if you are in there to work on the tank or something, it may be a good idea so you dont have to get in there again... otherwise drive it
tj
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Old Mar 29, 2005 | 11:47 AM
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Originally Posted by CFI-EFI
On the other hand, sometimes they don't give warning.

RACE ON!!!
There is only one condition when this will happen.....When you are the furthest possible distance from civilization...
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Old Mar 29, 2005 | 11:51 AM
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Originally Posted by cuisinartvette
Anyone have a PN on the sock? I know my 89 has a newer pump, but judging by the way the former owner repaired other items I doubt the sock was replaced unless the pump came with it..
I don't have the p/n now, its at home. I know the f/p does not come with a sock. You can probably get one locally for about $5. Otherwise, I would call Chris May/Superior Chevrolet for the GM p/n.....its about $19 with forum discounting (eek).
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Old Mar 29, 2005 | 11:57 AM
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Any autozone will be able to find the sock piece for you, and have it at a descent price.

I replaced the fuel pump in my vette last summer, it only had 70,000 miles on it- but was making a lot of noise.

I just replaced theone in my Cavalier this winter- that had 220,000 mileson it.
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Old Mar 29, 2005 | 12:47 PM
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The fuel pump in my '88 failed in mid 2000 with about 97k miles on the clock; the sock was nearly disintegrated.

A few weeks ago I replaced the pump & sock, with 149k miles on the clock and the sock was only slightly discolored but in tact.

I picked up the pump and the sock from a local AC Delco dealer.
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Old Mar 29, 2005 | 01:21 PM
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Originally Posted by cuisinartvette
Anyone have a PN on the sock? I know my 89 has a newer pump, but judging by the way the former owner repaired other items I doubt the sock was replaced unless the pump came with it..
GM part number 25055455, 1984 to 1990. It probably fits later, but my book was printed on 1989. Because the book is 16 years old, the number may be superseded, but if the number isn't current (should be) it will get you what you want.

RACE ON!!!
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Old Mar 29, 2005 | 01:48 PM
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The fuel filter is really the one that should be replaced at some interval. If you consitently run the fuel tank to near empty, the filter will eventually clog up and restrict flow.

It's sort of a PITA to replace but probably worth doing every couple of years as the filter is not terribly expensive at around $12 or so. AC-Delco GF481 is the correct filter.
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Old Mar 29, 2005 | 04:44 PM
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Originally Posted by Frizlefrak
There is only one condition when this will happen.....When you are the furthest possible distance from civilization...
Usually raining as well.
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Old Mar 29, 2005 | 07:04 PM
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Originally Posted by Pete K
Usually raining as well.
Your forgot to mention the middle of the night, middle of BFE, raining or temp about - 50 with a 100 mph wind blowing. Oh, sorry that is only the panhandle of Texas.
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Old Mar 29, 2005 | 07:21 PM
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Originally Posted by aj1988
Your forgot to mention the middle of the night, middle of BFE, raining or temp about - 50 with a 100 mph wind blowing. Oh, sorry that is only the panhandle of Texas.
My optispark started giving me problems in the Texas panhandle with weather conditions about like you describe. It was not a good feeling! Fortunately I was able to make it to a motel in a small town, and the car ran fine and got me home (400 miles) the next day.
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