2011-5-3 · So let s just say for grins you are changing gas caps for whatever reason and you re not sure whether you have a vented cap non-vented or what. When you get that straightened out you re going to want to be able to keep using one key for everything. Here s the skinny as it applies to a 2007 650.
2011-3-22 · If your cap blew off in your hand it is either not the right cap or the vent is not working. Check your oil level to make sure the fuel pressure did not force gas past the needle valve and into the crankcase. This would thin the oil enough to lower the oil pressure. If the oil smells like gas change it and get a vented cap.
2013-7-1 · 11 005 Posts. #14 · Jul 1 2013. Nope that is actually normal. It takes very little pressure to cause the tank to "plump". 1969XR7Vert said While I agree in principle with what you ve said and how vented gas caps work I think that a gas tank "plumping" to the point that the top displaces 1
2018-3-12 · I also had fuel tank venting problems causing a vacuum. My new locking gas cap was non-vented. My solution was to drill a vent hole in the cap with a 1/16" dia. drill bit. The results were wonderful. I now have a vented fuel tank and engine mounted fuel pump is happy. I had tried to locate a locking vented gas cap with no success.
2018-3-12 · I also had fuel tank venting problems causing a vacuum. My new locking gas cap was non-vented. My solution was to drill a vent hole in the cap with a 1/16" dia. drill bit. The results were wonderful. I now have a vented fuel tank and engine mounted fuel pump is happy. I had tried to locate a locking vented gas cap with no success.
2009-7-22 · Vented caps (especially nowadays) are only vented in not out so harmful fumes don t escape into the atmosphere. Same thing happened to me but I believe my A1000 pump and the large amount of return fuel from my regulator contributed to my problem almost blew the cap across the gas station when I spun the cap off real fast once.
2014-8-18 · I bought a replacement tabbed gas cap (that appeared to be vented but i still vapor locked) from Ebay. I drilled a hole in the cap which seemed to do the trick so long as i don t hot dog around and slosh fuel out of the hole. My problem is with the rubber gasket seal. it s warping and failing on me fuel spilling out from underneath the cap.
2014-7-15 · Jul 7 2014. #4. Stock and replacement fuel caps are vented already. There is a check valve in the center to allow air to enter the tank but not allow fuel vapor out. If you want an open vent cap then get a pick and root around in the hole in the center of the cap and pull out the small hair spring in there.
2014-6-9 · 3. Install a line from tank to gas can. 4. Turn on petcock or turn ignition key on to cycle the fuel pump if applies . 5. Watch the flow stop or keep flowing into container. If It flows then no change as in no gas cap clogging if petcock style. It trickles and almost stops and this is the fuel pump style then yes a
2020-7-2 · Struggling to tighten your gas cap is a common sign of a broken gas cap. Often gas caps are made so that they will click once to indicate they are tightened. If you do not hear a clicking noise despite tightening the cap as usual or if you hear a click but the cap pops back loose you may need to replace your gas cap.
2018-12-27 · The "standard" cap is vented. All filler necks on 65-69 have the dimple. The cap gasket is not replaceable on the caps I ve seen. I ve added an extra Moroso vent tube for my Sniper EFI. I would love to have an un-vented cap. They don t seem to exist. Maybe there is a cap from another car model that is unvented that fits on a Ford.
2012-6-17 · What I have instead of a vented gas cap is a vent on top of the tank that leads thru a check valve then into what I ve come to understand is a charcoal canister. As far as I can tell the check valve is installed the proper way (arrow on the valve points from the tank to the canister).
2014-7-15 · Jul 7 2014. #4. Stock and replacement fuel caps are vented already. There is a check valve in the center to allow air to enter the tank but not allow fuel vapor out. If you want an open vent cap then get a pick and root around in the hole in the center of the cap and pull out the small hair spring in there.
2011-5-3 · So let s just say for grins you are changing gas caps for whatever reason and you re not sure whether you have a vented cap non-vented or what. When you get that straightened out you re going to want to be able to keep using one key for everything. Here s the skinny as it applies to a 2007 650.
2011-5-3 · So let s just say for grins you are changing gas caps for whatever reason and you re not sure whether you have a vented cap non-vented or what. When you get that straightened out you re going to want to be able to keep using one key for everything. Here s the skinny as it applies to a 2007 650.
2014-8-18 · I bought a replacement tabbed gas cap (that appeared to be vented but i still vapor locked) from Ebay. I drilled a hole in the cap which seemed to do the trick so long as i don t hot dog around and slosh fuel out of the hole. My problem is with the rubber gasket seal. it s warping and failing on me fuel spilling out from underneath the cap.
2018-12-27 · The "standard" cap is vented. All filler necks on 65-69 have the dimple. The cap gasket is not replaceable on the caps I ve seen. I ve added an extra Moroso vent tube for my Sniper EFI. I would love to have an un-vented cap. They don t seem to exist. Maybe there is a cap from another car model that is unvented that fits on a Ford.
Because the fuel tank is pressure-driven from a fuel pump and gas naturally expands and evaporates a large amount of pressure can build up inside the fuel system over time. This second kind of pressure is taken care of through the operation of the fuel pump mechanism as the vented gas cap needs to be the one-way flap to keep evaporated gas fumes in.
2012-5-29 · 12 Posts. #14 · May 29 2012. sqb said My non-vented cap has a rubber gasket which seals the cap against the tank opening. I "vented" the cap by making a small hole in this rubber gasket. It works great A small hole should be fine and I placed it on the high side of the cap (toward the handlebars).
2012-6-17 · So the latest updates are it can not possibly be a clogged vent in the gas cap because I do not have a vented gas cap. Can t argue with logic like that. There are also some new symptoms or rather some old symptoms at some new times. The scooter will drive for a few miles at a time before puttering out. I ll pull over and it won t start.
2009-7-22 · I had the same problemmany years ago. I bought a new Stant vented gas cap and within a day blew my stock fuel pump and dumped about a gallon of fuel into the oil pan (through the fuel pump body). I noticed low oil pressure and a louder than normal engine. I remember taking the fuel line off and gas streaming out just like you said.
2009-7-22 · Vented caps (especially nowadays) are only vented in not out so harmful fumes don t escape into the atmosphere. Same thing happened to me but I believe my A1000 pump and the large amount of return fuel from my regulator contributed to my problem almost blew the cap across the gas station when I spun the cap off real fast once.
2011-1-12 · The cap never gets tight that is why it clicks. It should be fairly easy to open even after you click it tight. In my experience the little lanyard on the cap is the issue not the cap itself. That lanyard gets twisted up pulls on the cap all the time which is not designed to tighten a lot so it comes loose.
2009-9-1 · The fuel vent for 58 and 59 was a vent line loop except wagons which had a hole in the pipe for venting. 1960 changed to a vented cap and 61 changed again to holes in the filler pipe as shown in the pics below from the 60 and the 61 Chevrolet New Product Information Manuals. 1960 Fuel System. 1961 Fuel System.
2018-12-27 · The "standard" cap is vented. All filler necks on 65-69 have the dimple. The cap gasket is not replaceable on the caps I ve seen. I ve added an extra Moroso vent tube for my Sniper EFI. I would love to have an un-vented cap. They don t seem to exist. Maybe there is a cap from another car model that is unvented that fits on a Ford.
2011-5-3 · So let s just say for grins you are changing gas caps for whatever reason and you re not sure whether you have a vented cap non-vented or what. When you get that straightened out you re going to want to be able to keep using one key for everything. Here s the skinny as it applies to a 2007 650.
2013-7-1 · 11 005 Posts. #14 · Jul 1 2013. Nope that is actually normal. It takes very little pressure to cause the tank to "plump". 1969XR7Vert said While I agree in principle with what you ve said and how vented gas caps work I think that a gas tank "plumping" to the point that the top displaces 1
What I want is a VENTED gas cap that would fit my mower. The one that came with the mower is not vented and the replacement cap in your diagram does not appear to be vented. The mower always starts easily when cold. DO NOT USE CHEAP GAS. 5. One of the problems you seem to have is a phenomenon called "VAPOR Lock".
2021-4-21 · OPENING the cap (unscrewing it a bit) will fix the problem within 15 seconds and this test is nearly 100 for a bad cap vent. The cap can be modified to fix the problem permanently. Put it upside down on your workbench. Drill AWAY from the center any direction about 1/2" from the center.
2012-5-29 · 12 Posts. #14 · May 29 2012. sqb said My non-vented cap has a rubber gasket which seals the cap against the tank opening. I "vented" the cap by making a small hole in this rubber gasket. It works great A small hole should be fine and I placed it on the high side of the cap (toward the handlebars).
2020-7-2 · Struggling to tighten your gas cap is a common sign of a broken gas cap. Often gas caps are made so that they will click once to indicate they are tightened. If you do not hear a clicking noise despite tightening the cap as usual or if you hear a click but the cap pops back loose you may need to replace your gas cap.
2012-6-17 · What I have instead of a vented gas cap is a vent on top of the tank that leads thru a check valve then into what I ve come to understand is a charcoal canister. As far as I can tell the check valve is installed the proper way (arrow on the valve points from the tank to the canister).
2021-4-21 · OPENING the cap (unscrewing it a bit) will fix the problem within 15 seconds and this test is nearly 100 for a bad cap vent. The cap can be modified to fix the problem permanently. Put it upside down on your workbench. Drill AWAY from the center any direction about 1/2" from the center.
2011-1-12 · The cap never gets tight that is why it clicks. It should be fairly easy to open even after you click it tight. In my experience the little lanyard on the cap is the issue not the cap itself. That lanyard gets twisted up pulls on the cap all the time which is not designed to tighten a lot so it comes loose.
2011-5-3 · So let s just say for grins you are changing gas caps for whatever reason and you re not sure whether you have a vented cap non-vented or what. When you get that straightened out you re going to want to be able to keep using one key for everything. Here s the skinny as it applies to a 2007 650.
2018-3-12 · I also had fuel tank venting problems causing a vacuum. My new locking gas cap was non-vented. My solution was to drill a vent hole in the cap with a 1/16" dia. drill bit. The results were wonderful. I now have a vented fuel tank and engine mounted fuel pump is happy. I had tried to locate a locking vented gas cap with no success.
Hi Y all I hope everyone is safe and well. I have car # 432 on a 71 Int. Been slowly working on it and soon it will be back on the road. I too had vapor lock problems however since I put a new elec fuel pump in the rear will all new gas lines and filters. We are working on the tank now to put some new stronger outlets on the top. The cap is a threaded marine cap that in not vented and never
2013-8-6 · I have the CA emissions and non-vented gas cap. I get a small woosh when I crack the cap lasting just a few seconds. I would think the force and duration of your cap venting / "whooshing" would also vary with the amount of fuel vs air in the tank and the temperature.
2014-7-15 · Jul 7 2014. #4. Stock and replacement fuel caps are vented already. There is a check valve in the center to allow air to enter the tank but not allow fuel vapor out. If you want an open vent cap then get a pick and root around in the hole in the center of the cap and pull out the small hair spring in there.
2013-10-25 · Joined Jun 27 2012. ·. 2 Posts. #26 • Aug 2 2012. flitecontrol said If it were mine I d would be more comfortable drilling a hole through the metal into a void (like the cylinder tube) that connects to the surface. Gas isn t likely to be able to make it to the surface that way. The rubber skirt around the cap is a seal.
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