20 year old Carter mechanical fuel pump leak? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-11-2010, 08:16 PM
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20 year old Carter mechanical fuel pump leak?

I did 2 WOT runs today in the street and lost power on the 2nd run, smelled gas, and headed home. My 383 stroker (350 block) has a Carter mechanical fuel pump which has to be a good 20 years old but has only 6500 miles on it which is the same as the engine give or take. It "was" leaking from the top half of the pump where you'd normally removed the 6 (I think it was 6) screws if you wanted to turn the position of the in/out openings and then reseal. Between the 2 halfs is a 1/8" rubber like gasket although I dont think its rubber only.

The leak appeared to be coming from the gasket and was pushing a good 1/2 gallon per minute. I took it apart, couldnt find any signs of cracks, resealed it using permatex reusable gasket sealer, and it still leaked although not as bad. From experience, is the gasket just dead? Its possible its just dry cause the car has roughly 6500 miles in 20 years. Can I replace that internal gasket or is a new pump in order?

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Old 07-11-2010, 09:03 PM
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Probably just the rubber has died with age. Carter pumps like yours are rebuildable, they sell a kit for it.
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Old 07-11-2010, 10:04 PM
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Didn't know about the kit, thanks
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Old 07-12-2010, 01:10 AM
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Not sure on the price for the kits, but I just replaced my leaking carter pump (from the same spot as yours) for $18 at Baxter auto parts.
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Old 07-12-2010, 06:01 AM
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Why fool around with it - you can buy a new one from Summit for $20 - $120 depending on what version you want : http://www.summitracing.com/search/Department/Air-Fuel-Delivery/Section/Fuel-Pumps-Regulators/Brand/Carter/Part-Type/Fuel-Pumps-Mechanical/Make/CHEVROLET/?Ns=Rank|Asc

You'll probably have to copy 'n' paste the link

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Old 07-12-2010, 06:28 AM
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Mine is the higher priced one with a kit going for roughly $40. I can't find just the one gasket/diapragm part seperately.

What's the gph on the $18 version?

Looks like eBay is calling.
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Old 07-12-2010, 12:27 PM
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Quote:
Originally Posted by bubbahotep
Mine is the higher priced one with a kit going for roughly $40. I can't find just the one gasket/diapragm part seperately.

What's the gph on the $18 version?
Looks like eBay is calling.
Not sure on the gph rating, but it is a direct replacement for the stock unit, part # m6626 (assuming you have an AT) Rings up on my receipt as "Carter SBC Musclecar Fuel Pump"
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Old 07-12-2010, 01:40 PM
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Quote:
Originally Posted by clicketyclack
Not sure on the gph rating, but it is a direct replacement for the stock unit, part # m6626 (assuming you have an AT) Rings up on my receipt as "Carter SBC Musclecar Fuel Pump"

I found that part online (thanks) and that appears to be an oem match. Mine has npt fittings and comes apart in 2 places for positioning the inlet and outlet. I'd be pissed if that part outputs the same as the pricey one . The oem would fit my setup easily with no clearance issues
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Old 07-12-2010, 04:22 PM
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Quote:
Originally Posted by bubbahotep
I found that part online (thanks) and that appears to be an oem match. Mine has npt fittings and comes apart in 2 places for positioning the inlet and outlet. I'd be pissed if that part outputs the same as the pricey one . The oem would fit my setup easily with no clearance issues
I remember seeing that one too, I think the price on it was around $37
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