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Post by Big-birds-ride on Oct 22, 2012 16:54:43 GMT -5
Someone out there must have come upon an issue when the early bradley gas cap threading gets messed up and its time to replace the cap. Any one found areplacement cap? Anyone tried to make a cap that fits the threads? I know that one can try to replace the entire filler tube, i am just hoping that someone found an easier practical solution. Attachments:
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Post by Roodog on Oct 22, 2012 17:07:57 GMT -5
I'm having the same issue. It is a marine fuel cap is what I found. They are the only one that I have found to fit. But I am having another prob completly. Here in Colorado they are emition testing everything and my so called "Fuel Cap" does not pass so they fail the hole car.
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Post by skip20 on Oct 22, 2012 17:51:32 GMT -5
I'm having the same issue. It is a marine fuel cap is what I found. They are the only one that I have found to fit. But I am having another prob completly. Here in Colorado they are emition testing everything and my so called "Fuel Cap" does not pass so they fail the hole car. It is a marine fuel cap which you can get at at boat shop. What year is your GT reg'ed as. Should be on your VW # for year of reg. Are they saying it need to be a vented system? If so, I do not think VW had a vented system back them. Maybe a vented gas cap? If so, maybe drill a 1/32" hole in the cap at the highest point. |
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Post by skip20 on Oct 22, 2012 20:48:10 GMT -5
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Post by Roodog on Oct 22, 2012 22:22:37 GMT -5
Well my title states that it is a 1990 bradley gt 1. So they are going by that and not the vw frame. Also it doesn't state that it is a kit car on the title so that's the main reason why I have to get an emissions test. So ya I'm not sure what to do. They just stated that I neded another filler system.
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Post by Roodog on Oct 22, 2012 22:27:59 GMT -5
What fuel cap is that with the keys in the pic that you showed. And where would I find that?? Is that a marine cap.
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Post by skip20 on Oct 23, 2012 3:54:35 GMT -5
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Post by Dan MacMillan on Oct 23, 2012 8:22:00 GMT -5
Most VW caps were non vented. Early cars had a vent hose from the filler neck to atmosphere, later this hose wernt into the evap emissions system {charcoal canister}. Your fuel syst must be vented somehow or at best it will stall. At worst it will crush the fuel tank. Vacuum/atmospheric pressure are powerful forces, as can be seen here.  "The interior of this railroad tank car was being cleaned with steam by a crew late one afternoon. Because the job was unfinished at the end of their work shift, they sealed the car and left for the night. When they returned the next morning, they discovered that something had crushed the car in spite of its extremely strong steel walls," Low interior pressure {vacuum} was created as the tanker cooled. Same effect as pumping the liquid out. |
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Post by Roodog on Oct 23, 2012 14:19:09 GMT -5
Ya I drive a tanker truck and haul tallow witch is 150 deg so I know the crushing effect. Thanks for the info though. Thanks for the link on that keyed gascap I think I'm going to go that way with my cap. On the other hand I had never looked at my filler system untill lastnight. The car has always had a real prob filling. It never wants to drink everand takes a long long time to fuel up. Well I found that I have no vent line onthe tank but it has the spout. I can't tell if it is capped off or in the open. The tank is plastic and the vent is in the back so I have to drop the tank to see. If it is a vent and it is plugged is it better to run to a canister or figure out a way to tap it in to the fuel line up by the fuel neck?
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Post by Big-birds-ride on Mar 7, 2013 23:43:04 GMT -5
I spent some time looking for a gas cap for my Bradley. I don't know if this is the same set up as everyone else, however, I believe my bradley has most of the original kit parts including the tank and gas cap. Here is a photo of my gas cap on my GT Attachments:
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Post by Big-birds-ride on Mar 7, 2013 23:45:06 GMT -5
My filler area and gas cap have brand name Perko on them. The opening is 1-1/2 inches in diameter. Attachments:
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Post by Big-birds-ride on Mar 7, 2013 23:47:55 GMT -5
Perko Boat Gas Filler Cap & Flange Marine Fuel Fill Tube/This item for sale is a brand new Perko gas fill. Made of chrome plated zinc with black plastic flange and cap. Outer diameter overall is 3-1/8". Length of the neck is 1-7/8" for standard 1-1/2" fuel hose. Screw size is #6. This is what I found on ebay, which may be the exact replacement for my cap. Might be useful info in yours has the same type of gas fill. Attachments:
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Post by Roodog on Mar 8, 2013 18:33:17 GMT -5
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mpm
Junior Member
Member since 2008
Posts: 51
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Post by mpm on Mar 8, 2013 19:41:41 GMT -5
Most states require the cap to be vented as they place the cap in the machine and it is suppose to register a %. They go by the vehicle name & year to verify the proper % . I doubt they even have a Bradley listed in their test machines. Mine is vented from the filler tube w/ hose into the fender well where I have a charcoal filter canister mounted, talk to the mechanic & see if they will accept the alternative.
Regards,
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Post by Dan MacMillan on Mar 9, 2013 6:31:06 GMT -5
Todays caps are not vented. Tank gets vented through the vent valve. That way the computer can shut down the vent valve and apply vacuum to the tank to check for leaks. Leaks allow raw HC to get into the atmosphere. This is how it knows that the fuel cap has not been installed properly and sets a code or turns on the check cap light. VW needs a vent. You can install a NON vented cap and run a vac line from the nipple below the cap to a charcoal cannister.  That way when they check the cap it passes. |
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Post by Roodog on Mar 9, 2013 12:37:47 GMT -5
My Bradley is vented out the fender in a charcoal canister that I built. When I lifted the body of the car it gave me three more inches of drop in the fill neck and than I ran that vent. This fixed my problem of gas spilling out everywhere on the car when I filled the tank.
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Post by skip20 on Mar 9, 2013 14:22:29 GMT -5
Sounds like your filling the charcoal canister also on fillup.
Should be at the filler hole.
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