Iceman
So a NOS locking gas cap don't lock, thats weird?

I can push my gascap open in every position with or without the key, The round plate under the center screw will always push the two lock arms in.

Anyone who can lock their LOCKING Gas cap?
If so, and tell what the problem is:

Peter

About 10 years ago I bought an NOS one too, that would not lock. I disassembled it and was able to get it to work correctly. It was something I fabricated up to fix it, but because so long has passed I don't remember what the fix was. I do recall it not being too involved. I think some sort of metal tab was broken, but I can't say for sure. I found something in the garage that I was able to make work with little modification.

Then I lost the cap!!! I eventually replaced it with used one, but it could use a better seal.

Still looking for one for my 70 Challenger. Are they supposed to be vented or not? My car is a 440-6 pk, if that makes any difference. How can you tell the difference? Is there a different part no.?

Thanks,
David

You have a broken part on your gascap. That lower disk with the blue coloring on the edge is supposed to have a tab sticking out 90 degrees away from the disk.
Actually, there should only be one disk with a tab, not two disks as shown. IIRC there is a thin rubber disc under the metal disk.
Mine broke in the same place. The design is bad, it is weak at the base of the tab.

If you look inside the base piece, the one on the far right of your picture that is marked either "Vented" or "Not Vented" on the bottom, there is a ~1/8" diameter pin sticking up about 1/8". When the disk is rotated by 90 degrees with the key, the tab, which you are missing, lines up with this pin and prevents the unlocking button from being pushed in and opening the cap.

I made a drawing for a new part to be made out of steel. The original is pot metal. I haven't gotten around to making the part yet.

Bob

My NOS one had not been out of the bag before I bought it, it does not lock either. After I discovered that, I walked around Carlisle one year & talked to car owners that still had their originals. NONE of the ones we tested that day actually locked.

Hhmmmmm...maybe a burgeoning business opportunity.

I wonder how much money I could lose by reproducing the lock disk for Challenger locking gas caps.

Hi Barry;
I am still looking for one for my T/A if anyone knows of one.
John

My "locking cap" doesn't lock either ...... ......


DISASSEMBLED



edit "NOT VENTED" used on most '70 cars (cars w/o N95)


Broken locking disc


again


Inside where the lock would/should make contact.

Now were getting there.

Anyone with a pic of the locking disc with the 90 degree tab.

Thanks for the pics and info. Let us know when the new part(locking disc) is for sale.

Peter

locking disc with the 90 degree tab.

ta340,
Welcome & thanks for the pic.

Can you measure the height of the tab?

90 degree tab.

Ta340,thanks for the pics.

I gonna make a new locking plate out of a piece of sheetmetal.

Peter

I guess I'm the odd man out.. Mine works perfectly... It came with my car amongst the stash of NOS parts... The orignal locking cap was still with the parts as well, but the guy I bought the car from had lost the key & drilled into the cylinder... I tossed that old junk...

What does the N9B represent? I don't have the build sheet, and that is not on my fender tag. The car is an R/T SE 440-6, with a build date of Nov. '69.

Would hate to pay the big bucks for the wrong part! Anyone care to guess if mine should be vented or not?

Thanks,
David

Not Vented would be 49 state compliant 1970 vehicles, Pressure/Vacuum is 1970 California Emissions only & 1971 all...

I bought an NOS one a few years ago, I've never taken it out of its plastic bag. Now you guys got me worried if it will work!
I have the original one off my T/A but when I bought the car I wasn't given a key for the cap.
20 years later the Mr. Norms sales folder for my car turned up and with it came a set of keys. I tried the key on my cap and it works just fine!
That cap is on my convertible now.
BTW, the guy I bought my NOS cap on ebay was in Mexico, and sold around 10 in a row a few years ago. I noticed the other day he listed another if anyone is interested. I had no problems with the purchase, he Fedexed it from Mexico and I had it within a week.

Altough I don't have a key for mine, I tought I should check mine. Here's a pic of what is inside, that particular part is not there at all in mine. It would be nice to get a hand drawing of the part so we can make a piece or better yet if someone would make a whole bunch.