Just cleaned and sealed the gas tank on my 1960 - which I purchased in January, but which won't be running for a while - and I realized at some point I need to get the locked gas cap off. Is there a source for a key that will work or do I need to drill it out and get a new cap? If a new cap, anything important to consider? Thanks.

 

We deal with missing keys on locked gas caps at work frequently and instead of drilling we use a flat blade screwdriver. Just jam it in and turn. Of course you will need a new cap after this, but it's quicker and easier than drilling.
66tom

 

You need a non vented cap for your 60. A cheap functional replacement is NAPA 703-1205 which costs about $5.00.

 

Donald - Why non - vented? I think the 1960 caps listed by Corvette America and Ecklers are vented. Is there any performance issue? Thanks for your response.

 

When you were working on your tank you should have noticed the vent nipple where the hose attaches to vent your tank. This is used instead of a vented cap.

 

Hardly any of the vendors list the correct gas caps. All C1's after mid-'57 have vented tanks, and take a non-vented cap; using a vented cap will result in fuel leakage. Use the NAPA cap noted above.

 

Thanks guys. Yes, I am aware of the vent tube, and I didn't know why a vented tank would also need a vented cap. Will go with the non-vented.

 

Like someone said in the other locking gas cap thread, there are only 5 or 6 keys that fit that cap. If you have the neck out of the car, just take it to a locksmith, and he'll make a key for you in a jiffy. And it's pretty easy to take out anyway, you should replace that rubber hose when you do the tank, they harden and leak when full, stink up inside the car.

 

Hmmmm.... I've been wondering about the locking gas cap I've been using on my '65, bought a few years ago from a vendor at Carlisle. It does not state vented or non-vented, but I do notice the car goes through the first quarter tankful a whole lot quicker than it does the rest.

For many reasons I do want a locking cap but I'm pretty sure this one is leaking. Thinking it was the seal, I hand-cut a new ring gasket from a flat rubber/cork sheet, but it doesn't seem to make a difference and because of this thread I'm guessing gas is spilling out the vented top. There has always been some oily gas residue around the top of the keyhole.

One option would be to fill the tank only 3/4, but with a lot of long drives I hate to have to stop and fill up 25% more often than necessary. I'm pretty sure I'm wasting gas at least 8 worth of gas (and polluting) from every fill - That adds up!

I think I'll be looking for a new, non-vented locking cap in Carlisle later this week. Anyone ever seen one?
Would a '65 (or any midyear) ONLY take a non-vented cap to avoid the spill?

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Post - edit:


I just found information from Eckler's of a product that looks just like the one I own.
Based on the description, perhaps my mistake is running with the gasket - but with no seal wouldn't gas just splash out and leak through?


http://www.ecklerscorvette.com/corve...1963-1974.html
Corvette Locking Gas Cap, Chrome, 1963-1974

• Reproduction Of Original
• 1963-69 Vented Gas Tanks Use Cap Without Gasket
• 1970-74 Non-Vented Gas Tanks Use Cap With Gasket

 

What about a 67 locking cap? I have the exact same chrome locking one on my 67 and it has a small hole in it with brass part inside that falls towards tank, if pressure builds it releases the pressure - Is it a Vented cap? Also on a 67 the tank is not otherwise vented is it?

Ive had this cap on the car for 44 years

The stock non locking cap on Ecklers says its supposed to be vented - See: http://www.ecklerscorvette.com/corve...1963-1969.html

 

Quote I'll be looking for a new, non-vented locking cap in Carlisle later this week. Anyone ever seen one?
Would a '65 (or any midyear) ONLY take a non-vented cap to avoid the spill?



If Im not mistaken I thought 64-68 Corvettes all came equipted with a vented cap.

 

Later C1s require a NON-vented gas cap....the NAPA version listed above in post #3 does well, its non-vented with a tight fitting rubber gasket, and that's what I run. If you top off the tank and then make hard right turns (especially on an incline) gas will run out the long vent tube under the gas tank door and you'll get that nice aroma of raw gas. Running an unnecessary VENTED cap will make this worse and is unnecessary...

Also reproduction metal C1 filler necks are pretty notorious for leaking around the upper weld. I ran JB-Weld around it with a finger tip (this can be done while the part is on the car) and it sealed that common defect up nicely.

No gas odors in my '61 unless I have Mexican for lunch.

 

As usual, Eckler's has everything wrong. '63-'69 tanks are NOT vented - they use a vented cap with a paper gasket.

 

I used to smell gas all the time in my 60 but when I went with that NAPA cap, I no longer smell gas after taking a corner aggressively.

 

Thank you once again John - you are the authority!

... but any tips on finding a locking cap that doesn't leak?