Interesting info on locking gas cap part no.

Hey everyone, just wanted to bring something I recently learned to everyone's attention. I was at the local auto shop throwin part umbers around, tryin to find a few things when the guy behind the counter realized that Stant number 11491 is actually the same gas cap as Stant number 10491! Only the packaging is different... That's right, the part number is specific not only to the cap itself, but to the type of packaging used.

The parts store had this cap in stock for under 15 bucks. It fits perfectly, looks identical, and comes with 2 keys. Mine (10491) came in a cardboard box whereas the guy said 11491 (The one listed on the parts locator page) was either a plastic packaging or "strip" packaging I cant remember which now.

Anyway I hope this helps someone find what they need in stock locally...

Peace,
Brian

So what needs to happen to get this added to the parts locator?

Every locking gas cap that I have tried on my van built up pressure in the tank & caused the engine to run bad. I have tried just about every one available with all of the same out come. I dont think how ever that I have tried this one. Can you check it after driving your van a while & see if it has pressure when you unlock the cap and remove it?

@HandiVanMan
No problems here running that cap

Cool I will try one out.

donivan65 wrote:That's the one we use,,,,,,,,,,,

No 10491 isn't listed on the parts page. What I'm saying is that 10491 and 11491 are the same gas cap, the different number designates different packaging. I'd like to see 10491 listed along with 11491 because my local parts place has several 10491s in stock but would have to order 11491 with a 2 week delay. I'm lucky that my parts place is familiar with stant's part numbering schema and knew that the second number designates a particular packaging and was able to cross reference it with the one he had in stock. Just trying to save others from having to order a part and wait for it to arrive in plastic packaging, when there's one in a cardboard box sitting on the shelf at the shop.

I just drove 1000 miles with stant 10491 with no issues what so ever...

Peace,
Brian

what ever fits-just drill a small hole from inside into a area that wont be detreental to the cap or lock area. No Pressure in tank!!=

Hey, Thanks alot! I was so bummed when they told me the lead time on the 11491. I recently installed a Holley TBI system on my van and I plumbed the return fuel line into the vent line into the tank. Shortly after I noticed fuel stains on the exterior of the van and found my gas cap outer gasket was cracked in 3 placed... I was about to leave for Christmas and didnt want to drive 1000 miles spewing gas out the filler... C&J in Wimberley, TX did me right, as usual.


Peace,
Brian

donivan65 wrote:Do you now have an electric fuel pump? I think fuel injection likes a charcoal canister rather than a vented gas cap....

Yes I do have an electric fuel pump... whats a charcoal canister??? It's a Holley Projection 2D, so its fairly low pressure...18 psi max on the send line and less on the return line. Im really curious about this canister business! This is my daily driver, so anything I can do to increase longevity or lower cost of ownership is a huge plus... So maybe putting a 350 roller motor with decked, ported heads and a 9.8:1 comp ratio wasnt the absolute best idea for fuel economy out of the gate, but I wanted to have a little fun at least...that being said, the powerglide is still my worst enemy on that front... 700r4 and 12 bolt w/3.08 coming soon...

Peace,
Brian

Also, on a side note, my drive was very interesting. I spent one night in alamosa, co. It was -16 degrees that night and even at 9a.m. it was -4... Some of the original paint on my van (soon to be repainted) literally cracked and fell off in the night. I really gotta learn to post pics because you guys got to see this... Also cracked my original vinyl seats when I sat down... The fuel lines had frost on them and I had to lean the choke all the way out, but the van started right up...

Peace,
Brian

Interesting, so it sounds like this might actually improve fuel economy, even if only by a minimum amount... I can drive 300 miles and when I pull the cap, no pressure at all... Not sure what that means, but the system seems happy right now... well other than the injector which misses a pulse every once in a while... New injectors on the way...

I got an old generic locking cap and hacksawed off the outer tangs and then it fit fine. Then, of course because it was NOS the rubber cracked only on one side so I leave that on the bottom. Leaks a little when I fill her up so I avoid. Guess the crack negated any suction problems. As I have a stock fuel pump, probably about 3 psi., I suppose it would not be able to overcome too little venting.

The world doesn't like our old stuff in general even tho we are way past energy break even--a good thing. That's why the world, dummies like politicians, do buyback programs--junking good cars. And, of course, they get all those "donations" from the car companies for the new business.

Nonetheless, I'd love to have a charcoal cannister to recover vapor because it's probably one of the worst things I do pollution wise. Just haven't figured out how and where to rig. Should have done it when I R&Red the tank.