67 427 fuel pump

[Terry M.]

My original pump has HF40482 cast on the side. A NOS one has 62140482 cast on the side. Is this correct? The reason I am asking is mine is leaking badly.

[Joe L.]

Re: 67 427 fuel pump

My original pump has HF40482 cast on the side. A NOS one has 62140482 cast on the side. Is this correct? The reason I am asking is mine is leaking badly.

Terry------


I don't know what you mean by "cast on the side". No AC fuel pumps have any significant numbers as a feature of a casting. If you mean STAMPED numbers, I have no doubt that the replacement pump you have will be 100% functional for your application. Is it identical with respect to every nuance of configuration to the existing pump (original or not)? Well, obviously not according to what you report.

By the way, I really seriously doubt that a fuel pump currently residing on a car built 44 years ago is original to that car. It's not totally impossible, but I consider it unlikely.

[Terry M.]

Re: 67 427 fuel pump

AC is cast on both sides and HF40482 is stamped on the flange. The NOS one is identical except it has 62140482 stamped on the flange. The judging manual says the part number is 6440482. Which one(s) are correct for the car? I am looking for an original fuel pump for my car.

[Ronald L.]

Re: 67 427 fuel pump

Terry - a picture is worth a thousand words. Post pictures, they sound correct and what is supposed to be on there - both of them. The detail is in those subtle numbers and other identity marks stamped into these.

[Terry M.]

Re: 67 427 fuel pump

Here are the photos of the NOS fuel pump:

http://cgi.ebay.com/67-68-69-NOS-AC-CORVETTE-FUEL-PUMP-427-40482-TRI-POWER-/360364704864?pt=Vintage_Car_Truck_Parts_Accessories&hash=item53e7690460

[John D.]

Re: 67 427 fuel pump

Thats a service replacement pump...the cast AC letters are larger on orginals...the current AC/Delco replacement has no AC logo cast on the side but looks exactly the same and cost $29.....

[Terry M.]

Re: 67 427 fuel pump

Corvette Central lists one ( #352239) that is an original rebuilt unit. Anyone familiar with these?

[David L.]

Re: 67 427 fuel pump

Terry,

Based on my research your "HF40482" fuel pump is dated August 1966 ("H" = August and "F" = 1966). I started a thread about date codes on AC fuel pumps several months ago. What is the date on your engine?

Dave

https://www.forums.ncrs.org/showthre...84774&uid=8596

[Terry M.]

Re: 67 427 fuel pump

Dave,
My block date code is September 27, 1966 and engine pad is November 3, 1966. I am looking for an original fuel pump or can mine be rebuilt? My car is a low mileage original.
Terry

[David L.]

Re: 67 427 fuel pump

Terry,

There is no question in my mind that your "HF40482" fuel pump is original. The August 1966 ("HF") date code matches up perfectly with your engine dates (Sept. 27 and Nov. 3, 1966) and since you car is low mileage that would explain why the fuel pump was never changed.

The only fuel pumps that can be rebuilt are the ones with the 10 screws like the AC 4657.

My 1967 Chevrolet Parts Catalog (effective April 1967) lists GM 6416741 (AC # 40482) as the fuel pump for the 67 Corvette (427).

According to GM Parts Direct GM # 6416741 is still available for $61.32 list price but is "on sale" for $31.27 plus shipping BUT the pump may or may not be made by AC.

The date codes on the current fuel pumps are different. You have a better chance finding a needle in a haystack then finding a NOS "HF40482" or "IF40482" fuel pump.

Dave

[Terry M.]

Re: 67 427 fuel pump

Are there any deductions on a rebuilt original Corvette Central fuel pump (#352239) with the AC logo and number stamp on the flange?

[David L.]

Re: 67 427 fuel pump

Terry,
I do not think you would loose any points because of the date code on a fuel pump because I believe the guidelines are still in the dark ages about this issue. There are too many non-believers in my date codes theory to make a change in the guidelines and here is why:
1. Owners of very original cars would now have to find a correctly dated fuel pump for their car or else they would loose points.
1. Sellers of original AC fuel pumps would limit the application of their AC fuel pumps because of the date code.
I think that you can breathe easy and not have to worry about fuel pump date codes for at least 20 or more years.
Dave

[Joe L.]

Re: 67 427 fuel pump

Terry,

There is no question in my mind that your "HF40482" fuel pump is original. The August 1966 ("HF") date code matches up perfectly with your engine dates (Sept. 27 and Nov. 3, 1966) and since you car is low mileage that would explain why the fuel pump was never changed.

The only fuel pumps that can be rebuilt are the ones with the 10 screws like the AC 4657.

My 1967 Chevrolet Parts Catalog (effective April 1967) lists GM 6416741 (AC # 40482) as the fuel pump for the 67 Corvette (427).

According to GM Parts Direct GM # 6416741 is still available for $61.32 list price but is "on sale" for $31.27 plus shipping BUT the pump may or may not be made by AC.

The date codes on the current fuel pumps are different. You have a better chance finding a needle in a haystack then finding a NOS "HF40482" or "IF40482" fuel pump.

Dave

Dave------



Yes, I'd say you are correct and this is the original pump. Low mileage or not, this pump has been living on borrowed time for a VERY long while. If I knew that a mechanical fuel pump on a car was this old, I'd be afraid to drive it. A fuel pump is, after all, a SAFETY-RELATED component.

All AC mechanical fuel pumps sold for many years have been manufactured by non-GM entities. I believe that AC ceased the manufacture of MECHANICAL fuel pumps sometime in the 80's. I believe that current AC Delco-branded mechanical fuel pumps are manufactured by Airtex or, possibly, Carter.

As far as replacement pumps are concerned, here's how I see it:

1) For a driven car, even a modestly driven car, I would use only a currently manufactured pump. These pumps will have elastomeric (rubber) components which are compatible with today's fuel. NOS pumps, especially those with AC emblems on the casting, will likely have older-formulation internal components.

2) For a "trailer queen" type car, use a "rebuilt" original pump or an NOS pump which includes as many "nuance" features of the original pump as one can find. Of course, finding an NOS pump which is absolutely identical to the original, including dates, is likely going to be near-impossible.