64 gas cap

[John F.]

Can someone post a picture of a 64 gas cap, not the trap door?

[Joe L.]

Re: 64 gas cap

Can someone post a picture of a 64 gas cap, not the trap door?

John------


The 1964-69 Corvette fuel caps were basically the same. The main difference was that the 64-68 versions used a brown cellulosic ("paper") gasket whereas the 1969 used a rubber gasket.

[James W.]

Re: 64 gas cap

Here's the gas cap that is on my January built 1964 Corvette convertible. I bought the car in 1980 and this is what was on it. Went through all levels of flight judging as recent as year 2014 with no deductions.

James

[Joe L.]

Re: 64 gas cap

Here's the gas cap that is on my January built 1964 Corvette convertible. I bought the car in 1980 and this is what was on it. Went through all levels of flight judging as recent as year 2014 with no deductions.

James

James-------


This looks more like a 1963 cap to me.

[Keith W.]

Re: 64 gas cap

Approx 1963 vin 11000 through to end of 1964

[Paul O.]

Re: 64 gas cap

More Photo's

[Joe L.]

Re: 64 gas cap

All------

The E1963 and L1963-67 fuel caps are nearly identical in appearance. There is a great functional and internal difference, though. The E1963 fuel cap has no internal pressure-vacuum valve. Instead, it has a simple hole in the center of the bottom plate of the cap. The L1963-67 cap has an internal pressure vacuum valve. This valve cannot be seen. However, what can be seen is a very small crimp surrounding the center hole. So, a cap with just a hole and no surrounding tiny crimp is the E1963 cap; a cap with the tiny crimp is a L1963-67 cap. The same, basic cap was also used for 1968 and 1969. However, the 1969 cap used a rubber gasket. I'm not sure about the 1968 cap.

Originality considerations aside, I recommend the rubber-gasketed 1969 cap for all 1963-69 Corvettes. So did GM.

Tip: if one has a 1963-69 Corvette with a GM replacement fuel tank purchased after about 1970 (i.e. GM #3967746), then from a functional perspective, one should use the 1970-74 SEALED cap. The GM #3967746 fuel tank has an integral pressure vacuum valve and does not require a vented cap. In addition, using the sealed cap with this tank will help minimize the "wafting in" of gasoline vapors into the passenger compartment. One can always change to the correct cap for judging.

[Rick A.]

Re: 64 gas cap

James-------


This looks more like a 1963 cap to me.

Agree with Joe - as looks like early 1963 cap to me

[Stuart F.]

Re: 64 gas cap

My July 9 build 63 has just the vent hole. Been that way since I took delivery in August 63. I put it on the shelf in favor of either my locking cap for cruisins or my replacement vent valve cap for driving. Figured it was too valuable to leave on the car for the cap thieves.

Stu Fox

[James W.]

Re: 64 gas cap

Looks like I need to start hunting for a '64 and later gas cap. I'm sure I can put this one up for sale in the Drive Line. Funny that it took no deduction all the way through flight judging.

James

[Joe L.]

Re: 64 gas cap

Looks like I need to start hunting for a '64 and later gas cap. I'm sure I can put this one up for sale in the Drive Line. Funny he w it took no deduction all the way through flight judging.

James

James------

I'm a bit surprised that some eagle-eyed judge didn't pick up on this. In any event, I suppose it's within the realm of possibility that this is the original cap installed on the car in St. Louis. I suppose it's possible that a few boxes of 1963 fuel caps got "lost in the shuffle" and found during the 1964 model year and installed on some 1964's. Of course, if a judge told you it was incorrect, you'd have no proof that it is the original cap.

The 1963-only caps are quite hard to find. The 1964-E68 are a lot easier.

By the way, I thought that a new judging policy had been established which foregoes the removal of anything during the judging process. If so, it would not make any difference which cap you have since, externally, there's no difference between the 63 and 64-E68 caps.

[John D.]

Re: 64 gas cap

John, I agree with the consensus here for more than one reason. Yes your cap is a '63. Everytime I take my 63, the LWC out of the garage (which isn't much) and I have it judged I remove the original cap that looks like yours. Then I put on a later cap. Well the last time I did this I forgot where I stashed the original cap.
Found it a year or so later as some dummy put it in my carry on bag. (JD)

Now for a quick discussion on vented versus non vented. Recently a customer with a mid year fuel injection had an issue with the restored unit. Car ran find on the engine in the shop. But when taken out on the highway at various rpm's it would run out of gas.
Turns out the car did not have a vented gas cap on. Customer put a vended cap on and the problem went away.

When he took the non vented cap off it was like taking a lid off a pressure cooker he said.
So we have to be careful and use the proper cap. John

[John F.]

Re: 64 gas cap

I just found this one on ebay and soaked for awhile in Evaporust, washed it out and blew it out with air. You can hear the valve rattle inside. It has a very faint c..s like a circle stamped on the underside. The vent hole has the crimp. See pictures.

[Joe L.]

Re: 64 gas cap

I just found this one on ebay and soaked for awhile in Evaporust, washed it out and blew it out with air. You can hear the valve rattle inside. It has a very faint c..s like a circle stamped on the underside. The vent hole has the crimp. See pictures.

John------


It looks right. You'll, of course, need to install a gasket. Dr. Rebuild has the correct cellulosic gasket. However, I'd use this cap for judging only. For other times, and assuming you have an original fuel tank, get yourself a Stant 10853. Except for the gasket, it will appear virtually identical to the original cap. Cost: about 20 bucks.

[John F.]

Re: 64 gas cap

Thanks Joe!