Yep. Its on my list of things to look at this week. It appears that the tabs in the top ring don't line up perfectly with the tabs on the bottom ring when in the open position. I'm either going to try filing them even or buy a new one.

 

Tim McAmis race cars sells a cool aluminum piece to replace it....seems like I'm always fighting those plastic ones !

 

for 80 bucks? ill just keep mind lubed with some silicone spray, once a month...

 

Yep. what happens is the plastic part that twist and turns under the metal ring swels and makes this hard. i did the same thing order a new one fixed the problem then it came again. I ended up just removing a bit of material from the platic and its has good as new.

 

x2 i did the same thing to mine and works good

 

mine gets a little corroded on the silver metal part of the cell and the top gets stuck. I just clean it up and it works fine for a while.

 

the edges of the tangs get hung up in the ring of the tank. either round off and thin the tangs or file the 3 relief areas on the tank ring.
I was going to get a Mcamis cap but then you cant get a hand in there when cleaning the tank.

 

X2

 

Had the same problem. I sanded on mine until it worked like it should. As stated above the plastic must swell. That is what I sanded on. Worked OK after that.

 

Does it swell more with gasoline or alcohol or does it make any difference?

Rick

 

Mine does the same thing. Nobody gives a shit about quality anymore.

 

Just ground the bottom tangs until the edge lined up with the top tangs about an hour ago. Works fine now.

 

why do people always make a ground wire around the inlet ring?

 

Rules require it for plastic cells. Don't want any static sparks.

 

oh ok, i have an aluminum cell...

 

The alcohol makes the plastic swell.
When I changed from gas to alcohol with in a couple of weeks I was having a hard time getting the cap off of my Jazz tank. After some grinding of the tangs on the cap I have had no more problems.
On this same note the plastic part that goes inside my System One oil filter swelled up so badly I did not think I was going to get it out to clean it. I had to reduce the diameter of the piece to get it back inside the filter screen.
Any one have this problem with their System One oil filters?

 

You are talking about the plastic basket that goes inside the Sysem 1 oil filter? I had the same problem on alcohol.I called System 1 and they said that is a problem with alcohol and sent me a new 1 no charge,just had to pay shipping........Grant

 

last cell we bought at the shop came with a large plastic threaded cap....definently works better than the old style one. think it was a rci .....speedway motors sells a different style fill for those as well.......

 

Have a friend with problems with his plastic cap. Had to grind the heck out of it to get it to work "easily". My truck has the bailing ring style metal cap and after 20 yrs still works perfect.

 

You are talking about the plastic basket that goes inside the System 1 oil filter

Yes the plastic basket(good name).
I held it up to my belt sander and reduced the diameter until it would go back into the screen. Have not had any more problems since then.
The alcohol is definitely a problem. Never had a problem when running race gas.

 

the new pump gas has ethanol in it and swells the seal and comp./plastic .new race fuels from vp and others also have this (oxygenator) in it
it will also swell the poly clear site plugs in the bowls till the floats hang up

 

Mine is brand new and I can’t get the cap off period. Am I going to have to disassemble it to get it open for the very first time ?!!!

 

Me and everyone I know throw that crap away and get a ProWerks cap,

 

This

Fill Caps and Bungs

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I was sick of my plastic cap. And sick of looking at it too.

 

Thanks for bumping an 11 year old thread.

Back to the eye doctor.