Fuel Clamps and Numbers and Confusion

[Kenneth T.]

I have a 71 LS5, the AIM shows spring type clamps on the fuel pump and fuel tank and return lines. The numbers from the AIM are 9419381 return and 3786276 supply. My GM parts shows no such #, production part only?

How do I find these buggers, I have the green square end springs for the fuel delivery, which "I think" is correct, but what about the return line?

To make it more confusing, I looked in the archive at Kevin Goodman's
benchmark and he shows a spring at the delivery and a tower at the return. Do I go by the AIM or a proven winner's car?

[Kevin G.]

Re: Fuel Clamps and Numbers and Confusion

Ken,

I've seen the spring/ tower combo now on several original examples. I think you would be fine following either description.

Kevin

[Grant W.]

Re: Fuel Clamps and Numbers and Confusion

I have a 71 LS5, the AIM shows spring type clamps on the fuel pump and fuel tank and return lines. The numbers from the AIM are 9419381 return and 3786276 supply. My GM parts shows no such #, production part only?

How do I find these buggers, I have the green square end springs for the fuel delivery, which "I think" is correct, but what about the return line?

To make it more confusing, I looked in the archive at Kevin Goodman's
benchmark and he shows a spring at the delivery and a tower at the return. Do I go by the AIM or a proven winner's car?

Make sure the spring clamps which ever color it is has the square tang on the end. Later GM or repops are rounded. So do it right the first time. Thanks, Grant

[Joe L.]

Re: Fuel Clamps and Numbers and Confusion

I have a 71 LS5, the AIM shows spring type clamps on the fuel pump and fuel tank and return lines. The numbers from the AIM are 9419381 return and 3786276 supply. My GM parts shows no such #, production part only?

How do I find these buggers, I have the green square end springs for the fuel delivery, which "I think" is correct, but what about the return line?

To make it more confusing, I looked in the archive at Kevin Goodman's
benchmark and he shows a spring at the delivery and a tower at the return. Do I go by the AIM or a proven winner's car?

Ken-----


GM #3786276 was available in SERVICE until 8/91 when it was discontinued and replaced by a completely different clamp.

I can't find that the GM #9419381 clamp was ever available in SERVICE. I can't say, for sure, that it was not, but it's not available now.

[Alan S.]

Re: Fuel Clamps and Numbers and Confusion

Hi Ken,
My 1 owner 71, #6589, has the very small tower clamps on the return line at the fuel pump and at the tank. A total of 4 clamps.
This is the original hose and clamp at the tank end of the return line.
Regards,
Alan

[Kenneth T.]

Re: Fuel Clamps and Numbers and Confusion

Allen,

Thanks, mine is #21715 July build. The Aim says two spring types, but Kevin,(thanks too) and Joe ditto, show what you have.

I am the original owner, but I changed stuff and there is a big diff between 20 and 60 It is good to have some reminders. I am moving toward getting the old girl judged next year. Loving the process and the knowledge gained about these cars.

Ken

[Scott S.]

Re: Fuel Clamps and Numbers and Confusion

Ken-----


GM #3786276 was available in SERVICE until 8/91 when it was discontinued and replaced by a completely different clamp.

I can't find that the GM #9419381 clamp was ever available in SERVICE. I can't say, for sure, that it was not, but it's not available now.

Hi Joe,

I found a set of these clamps with the GM packaging, showing the 3786276 part number and Group 1.855, but I don't see this part number in Group 1.855, in fact, I haven't found this part number in any of the Chevrolet parts books so far (up to the mid 1970s), although it's in at least several of the AIMs as far back as 1966 or earlier.

Was clamp #3786276 in Group 1.855 when it was available as a Service part? If not, where is it?

[Joe L.]

Re: Fuel Clamps and Numbers and Confusion

Hi Joe,

I found a set of these clamps with the GM packaging, showing the 3786276 part number and Group 1.855, but I don't see this part number in Group 1.855, in fact, I haven't found this part number in any of the Chevrolet parts books so far (up to the mid 1970s), although it's in at least several of the AIMs as far back as 1966 or earlier.

Was clamp #3786276 in Group 1.855 when it was available as a Service part? If not, where is it?

Scott------

The clamp was in primary group 1.855. The fact that that group appears on the package you have only confirms that.

It so happens that the "world of GM parts" is much larger than just Chevrolet. In this case, though, the part is a Chevrolet part number that was likely released sometime about late 1959 or early 1960. However, it had no SERVICE application for cars and light trucks as far as GMSPO was concerned. That does not mean that it was not used in PRODUCTION for cars and light trucks, it just means that it was not considered a SERVICE item as far as GMSPO was concerned for those applications. Thus, it appears in no car or light truck P&A catalog of the period.

I expect that this part was originally released for HD truck applications since it's applicable to both Chevrolet and GMC applications. GMSPO carried it for those applications but it was never included in any catalog for passenger cars or light trucks. Sometime in the 80's it began to be cataloged for some passenger car or light truck application but I don't know just what that application was.

[Scott S.]

Re: Fuel Clamps and Numbers and Confusion

Thank you!

[Scott S.]

Re: Fuel Clamps and Numbers and Confusion

Scott------

The clamp was in primary group 1.855. The fact that that group appears on the package you have only confirms that.

It so happens that the "world of GM parts" is much larger than just Chevrolet. In this case, though, the part is a Chevrolet part number that was likely released sometime about late 1959 or early 1960. However, it had no SERVICE application for cars and light trucks as far as GMSPO was concerned. That does not mean that it was not used in PRODUCTION for cars and light trucks, it just means that it was not considered a SERVICE item as far as GMSPO was concerned for those applications. Thus, it appears in no car or light truck P&A catalog of the period.

I expect that this part was originally released for HD truck applications since it's applicable to both Chevrolet and GMC applications. GMSPO carried it for those applications but it was never included in any catalog for passenger cars or light trucks. Sometime in the 80's it began to be cataloged for some passenger car or light truck application but I don't know just what that application was.

Joe,

The Chevrolet Heavy Duty Truck Parts Catalog (P&A 33, 1966-1969 2-1/2 and 3 Ton Trucks, Nov. 1st 1969 printing) only goes up to Group 1.844 before the next section (Group 2.000) begins.

In the "regular" Chevrolet P&A parts books (P&A 30) Group 1.855 is "ELBOW-TEE-CONNECTOR, Oil Filter Fitting", which seems like an odd placement for fuel line clamps. What other vintage (circa 1967 model year) GM parts books contain Group 1.855, where I could try to locate Clamp # 3786276 that was used in Production on the 1967 Corvette?

[Joe L.]

Re: Fuel Clamps and Numbers and Confusion

Joe,

The Chevrolet Heavy Duty Truck Parts Catalog (P&A 33, 1966-1969 2-1/2 and 3 Ton Trucks, Nov. 1st 1969 printing) only goes up to Group 1.844 before the next section (Group 2.000) begins.

In the "regular" Chevrolet P&A parts books (P&A 30) Group 1.855 is "ELBOW-TEE-CONNECTOR, Oil Filter Fitting", which seems like an odd placement for fuel line clamps. What other vintage (circa 1967 model year) GM parts books contain Group 1.855, where I could try to locate Clamp # 3786276 that was used in Production on the 1967 Corvette?

Keith------


You won't find it in any Chevrolet passenger car or Corvette P&A catalog.

Just because you don't find any clamp in group 1.855 in any given catalog, that does not mean it's not to be found in group 1.855 of ANY GM parts catalog. The heading for the particular parts group usually only contains the items that are part of that part group that are included in that catalog. So, if there is a clamp in any particular catalog in a particular group, "CLAMP" will be found in the heading. If there is no clamp included in that group in the particular catalog you are looking at, then "CLAMP" will not be in the heading or parts group description.

[Terry M.]

Re: Fuel Clamps and Numbers and Confusion

Joe,
You think it worth looking in the Standard Parts book? That is not a group number I usually think of in the SP book, and I assUme you would have covered that base, but ......

[Joe L.]

Re: Fuel Clamps and Numbers and Confusion

Joe,
You think it worth looking in the Standard Parts book? That is not a group number I usually think of in the SP book, and I assUme you would have covered that base, but ......

Terry-----

The clamp in question carries a primary parts group of 1.855. Of course, it could also be carried as a secondary parts group 8.948. However, from what I can find, it never was. For some strange reason, GM did not begin carrying this type of spring hose clamp in the standard parts group until metric sized clamps of this type came along.

[Terry M.]

Re: Fuel Clamps and Numbers and Confusion

OK, It was such an obvious question I figured you had looked. Sorry to question you.

[Joe L.]

Re: Fuel Clamps and Numbers and Confusion

OK, It was such an obvious question I figured you had looked. Sorry to question you.

Terry-----


I don't mind being questioned. It often spurs me to further research. Sometimes I learn something new.