1981-c3 Gas Cap Correct

[Michael H.]

Re: 1981-c3 Gas Cap Correct

Ed------


I think it's VERY, VERY possible it's the original cap. I have only found part number GM #557232 as listed for 1977 SERVICE. I haven't found it as ever used for PRODUCTION, but I think it was used for PRODUCTION. GM #557232 replaced GM #556389 for SERVICE effective November, 1977 and was itself replaced by GM #560524 in February, 1980. So, the period of its SERVICE availability very nicely coincides with the period that, if used in PRODUCTION, would have made it a candidate for use on 1979 Corvettes.

Here are the caps that GM says were used in PRODUCTION for each of the 1975-82 model years and a brief description of the ones I have such info for:

1975-----GM #419862----unknown description

GM #419863-----unknown description

GM #7470051----zinc plated metal top with chromate overplate "ear", "NDH"

1976-----GM #419862-----unknown description

1977-----GM #556389------same description as 7470051 except for
stamped part number

1978-----GM #447998------unknown description

GM #559346------zinc plated, convex metal top with chromate
overplate; no ear, "NDH"

1979------GM #559346------same as above

1980------GM #559346------same as above

1981------GM #559346------same as above

1982------GM #22510715----polished stainless steel metal top; no "ear",
"NDH"

I have attached a photo of an NOS example of the GM #22510715. Anyone ever seen one of these on an '82? The box that this piece was packaged in is dated 1981, so this is an original configuration piece.

Based upon what's been reported already in this thread, we haven't come up with a 1980, 1981, or 1982 Corvette yet that has the cap that GM says was originally installed. While the GM information is usually extremely accurate, I think these 80-82 gas caps may be an exception.

Ok I have purchased [2]-Stant Gas Caps NOS - 1-has G803 and is white plastic no markings on top but has 2-7 on black vented rim bottom and 2-8 inside on the flesh colored center piece.........Then the other is G-803 on the box which is a little smaller and older looking it came with the Brass looking metal cap with a stant logo on top just below stamped number # 22503147
no markings stamped on inside other than what looks like a # 4 . The Plastic cap has Printed on box "Patented Canada 1980"

[Michael H.]

Re: 1981-c3 Gas Cap Correct

Originally Posted by Joe Lucia (12484)
Ed------


I think it's VERY, VERY possible it's the original cap. I have only found part number GM #557232 as listed for 1977 SERVICE. I haven't found it as ever used for PRODUCTION, but I think it was used for PRODUCTION. GM #557232 replaced GM #556389 for SERVICE effective November, 1977 and was itself replaced by GM #560524 in February, 1980. So, the period of its SERVICE availability very nicely coincides with the period that, if used in PRODUCTION, would have made it a candidate for use on 1979 Corvettes.

Here are the caps that GM says were used in PRODUCTION for each of the 1975-82 model years and a brief description of the ones I have such info for:

1975-----GM #419862----unknown description

GM #419863-----unknown description

GM #7470051----zinc plated metal top with chromate overplate "ear", "NDH"

1976-----GM #419862-----unknown description

1977-----GM #556389------same description as 7470051 except for
stamped part number

1978-----GM #447998------unknown description

GM #559346------zinc plated, convex metal top with chromate
overplate; no ear, "NDH"

1979------GM #559346------same as above

1980------GM #559346------same as above

1981------GM #559346------same as above

1982------GM #22510715----polished stainless steel metal top; no "ear",
"NDH"

I have attached a photo of an NOS example of the GM #22510715. Anyone ever seen one of these on an '82? The box that this piece was packaged in is dated 1981, so this is an original configuration piece.

Based upon what's been reported already in this thread, we haven't come up with a 1980, 1981, or 1982 Corvette yet that has the cap that GM says was originally installed. While the GM information is usually extremely accurate, I think these 80-82 gas caps may be an exception.
Ok I have purchased [2]-Stant Gas Caps NOS - 1-has G803 and is white plastic no markings on top but has 2-7 on black vented rim bottom and 2-8 inside on the flesh colored center piece.........Then the other is G-803 on the box which is a little smaller and older looking it came with the Brass looking metal cap with a stant logo on top just below stamped number # 22503147
no markings stamped on inside other than what looks like a # 4 . The Plastic cap has Printed on box "Patented Canada 1980"

Attached Thumbnails

[Tom R.]

Re: 1981-c3 Gas Cap Correct

and your point?

[Edward M.]

Re: 1981-c3 Gas Cap Correct

and your point?

Yeah, I'm puzzled too (which doesn't take much effort).

[Michael H.]

Re: 1981-c3 Gas Cap Correct

and your point?

I'm sorry to annoy you Tom! I was unaware I needed to make a point on every post. I was just trying to share some information! I'm not familiar with all of your rules,or how the forum software works. I was enjoying my new found world here until your poor spirited reply.

(The NCRS Technical Discussion Board is an interactive resource for sharing information on Corvettes from model years 1953 through 1993)

I have always enjoyed all of the great comradery & conversations spending time with others Corvette enthusiasts who share the passion.

If this is how people are treated around here, I will cancel my NCRS membership and head to some of the other forums.

[Tom R.]

Re: 1981-c3 Gas Cap Correct

I'm sorry to annoy you Tom! I was unaware I needed to make a point on every post.

I'm not annoyed...I asked a question cause I didn't get it

I was just trying to share some information! I'm not familiar with all of your rules,or how the forum software works. I was enjoying my new found world here until your poor spirited reply.

You recycled a post from three weeks ago (someone elses) without a contribution...so the question:

"and the point?"

It's three words, three syllables, one question and you took offense

If this is how people are treated around here,

You either had a point or did not. Perhaps instead of getting defensive, go back and read your post of Mar 22...you may conclude you meant to add a comment and it was omitted.

I will cancel my NCRS membership and head to some of the other forums.

ok. Your emotionalism will be a good fit for those "other forums!" If you ramp up the font level, your post will still be viewed as "shouting."

Do more critical thinking and less critical feeling

[Edward M.]

Re: 1981-c3 Gas Cap Correct

Michael;

I asked the same question that Tom did, and for the same reason. This is a topic that interests me, but I could not tell from your post what your point was.

No need to get defensive or shout, just clarify what you meant to say. I, for one, would like this thread to go on. I think there is still undiscovered information in this topic.

[Glenn B.]

Re: 1981-c3 Gas Cap Correct

I don't want to get into the who shot who going on, but I will chime in on the gas caps.

I have an 81 that I bought new. It was built at Bowling Green in October 81 (vin 7471), I watched it come off the transporter at a local dealer on Nov. 3, 1981, made a deal on the car that day and took it home on the 4th. This car has the white cap described and pictured above. It was described previously as having an "S" or "SM" in a circle in the center. If you look closely at the ones with an "SM" on them you will see that it is actually a "CSM", it's a circle surrounding a large "C" with the "SM" in the middle of the "C".

I'm in the Corvette parts business and we have parted out a number of cars over the years. I'll admit that generally cars that get parted out aren't usually prime examples of the breed, but I've seen a number of different caps. The cap with ears I've associated with the 75-76 and maybe 77 cars, the domed style with the dimple in the center with 78-80's and the white plastic with 81-82's. I've seen the white plastic cap on both St. Louis and Bowling Green 81's.

Currently the only example of 75-82 caps I have in stock is a white plastic "CSM" cap that came off an 81. My 81 still has the "CSM" cap that it was delivered with. I couldn't find any dating on either of these caps. The only markings are a couple numbers molded in (example: 1-5) which I think are just the makers mold numbers.

[Edward M.]

Re: 1981-c3 Gas Cap Correct

There we go, more good information. Thanks Glen.

[Joe L.]

Re: 1981-c3 Gas Cap Correct

I don't want to get into the who shot who going on, but I will chime in on the gas caps.

I have an 81 that I bought new. It was built at Bowling Green in October 81 (vin 7471), I watched it come off the transporter at a local dealer on Nov. 3, 1981, made a deal on the car that day and took it home on the 4th. This car has the white cap described and pictured above. It was described previously as having an "S" or "SM" in a circle in the center. If you look closely at the ones with an "SM" on them you will see that it is actually a "CSM", it's a circle surrounding a large "C" with the "SM" in the middle of the "C".

I'm in the Corvette parts business and we have parted out a number of cars over the years. I'll admit that generally cars that get parted out aren't usually prime examples of the breed, but I've seen a number of different caps. The cap with ears I've associated with the 75-76 and maybe 77 cars, the domed style with the dimple in the center with 78-80's and the white plastic with 81-82's. I've seen the white plastic cap on both St. Louis and Bowling Green 81's.

Currently the only example of 75-82 caps I have in stock is a white plastic "CSM" cap that came off an 81. My 81 still has the "CSM" cap that it was delivered with. I couldn't find any dating on either of these caps. The only markings are a couple numbers molded in (example: 1-5) which I think are just the makers mold numbers.

Glen-----


The attached photos show another well used but known-original 1981 gas cap that I obtained recently. It's the white style that been often reported for 1981, 1982, and 1984. Try as I may, I've not been able to come up with a GM part number for this cap. It's not the GM #559346 shown in the 1981 AIM. It's not the GM #22510715 shown in the 1982 AIM.

Except for the color of the plastic (which may not even be specified in the GM specifications for the part) it's virtually identical to the GM #22525300 which was first used for the 1985 model year. However, I don't show any record of that cap being around as early as 1981.

It's possible that the white cap is a GM #22518911. However, I don't have any information, at all, for that cap.

Also, I think that the logo that you describe as "CSM" actually represents "SMC" in the "stylized" form used at that time. "SMC"= Stant Manufacturing Corporation

[Glenn B.]

Re: 1981-c3 Gas Cap Correct

Joe,

That appears to be the same cap that is on my 81, and also the same as the other cap I have here. The second cap I have came took off an 81 also, but it was about 3 years ago and I don't remember if that car was a St. Louis or Bowling Green car.

I agree with you about the "SCM", I knew they were Stant Manufacturing caps, I don't know why I interpreted it as "CSM". Sometimes you just look at these things to long and what should make sense, doesn't.

[Michael H.]

Re: 1981-c3 Gas Cap Correct

Michael;

I asked the same question that Tom did, and for the same reason. This is a topic that interests me, but I could not tell from your post what your point was.

No need to get defensive or shout, just clarify what you meant to say. I, for one, would like this thread to go on. I think there is still undiscovered information in this topic.

Edward , I thank you for your comment, and notes taken!
I mentioned I was new to using this board and its software. I had no intention of coming accross as yelling or shouting it is not my nature. I agree, I did not see that my post had been cut and photo's had been lost or I did not properly post them, which made it confusing.

I do not know Tom but the short comment "and your point is" seemed to me a bit condescending similar to other comments like "what ever" , "da" etc. His reply was not joyful but I plan to reach out and offer Tom an olive branch.

That said, I guess this type of interaction leaves interpretaions of written words to the imagination or definitions within the cyber comminities like CAPS is "shouting". You do not have the opprotunity to fully understand the spirit of all written situations as easily as you do face to face.

Thanks again, Edward

[Michael H.]

Re: 1981-c3 Gas Cap Correct

I'm not annoyed...I asked a question cause I didn't get it



You recycled a post from three weeks ago (someone elses) without a contribution...so the question:

"and the point?"

It's three words, three syllables, one question and you took offense



You either had a point or did not. Perhaps instead of getting defensive, go back and read your post of Mar 22...you may conclude you meant to add a comment and it was omitted.



ok. Your emotionalism will be a good fit for those "other forums!" If you ramp up the font level, your post will still be viewed as "shouting."

Do more critical thinking and less critical feeling

Tom, Thank you for your participation in the NCRS forum. I apologize to my fellow NCRS members for not understanding that you had a genuine helpful spirit in your original reply. My appologies.

I do not have much of technical expertise related to the mechnical aspects of Corvettes, but I plan to share what ever information (no matter how minor) with others. Maybe I will get lucky and help someone down the line.

Have a wonderful weekend Tom.

[Michael H.]

Re: 1981-c3 Gas Cap Correct

Glen-----


The attached photos show another well used but known-original 1981 gas cap that I obtained recently. It's the white style that been often reported for 1981, 1982, and 1984. Try as I may, I've not been able to come up with a GM part number for this cap. It's not the GM #559346 shown in the 1981 AIM. It's not the GM #22510715 shown in the 1982 AIM.

Except for the color of the plastic (which may not even be specified in the GM specifications for the part) it's virtually identical to the GM #22525300 which was first used for the 1985 model year. However, I don't show any record of that cap being around as early as 1981.

It's possible that the white cap is a GM #22518911. However, I don't have any information, at all, for that cap.

Also, I think that the logo that you describe as "CSM" actually represents "SMC" in the "stylized" form used at that time. "SMC"= Stant Manufacturing Corporation

Joe, I think it is great you were able to hang on to your one owner 1981. Thanks for taking the time to take the photo's.

I found another 1-owner that had a metal cap and it was from St. Louis. I also ran into a girl who was born in 1980 and her dad purchased and saved a new 1980 and gave it to her on her 19th birthday. It had the metal bronze color metal cap.

[Michael H.]

Re: 1981-c3 Gas Cap Correct

Joe,

That appears to be the same cap that is on my 81, and also the same as the other cap I have here. The second cap I have came took off an 81 also, but it was about 3 years ago and I don't remember if that car was a St. Louis or Bowling Green car.

I agree with you about the "SCM", I knew they were Stant Manufacturing caps, I don't know why I interpreted it as "CSM". Sometimes you just look at these things to long and what should make sense, doesn't.

Thank you - Glen - Do you have a rubber gasket under the rim of your air cleaner cover? If so what color?