I don't know if you need them as they would be inside the fuel rail and I am not sure what they would seal against. Maybe the explorer fuel rail is different than the Mustang.I have a use set of explorer 19lb injectors. Rebuild kit only has two orings, plastic cap (for the lower side) and filter. Where can I buy the small oring that goes on the top of the injector? Is it not needed? See picture which shows the red circle - one injector doesn't have the small black oring and the other does. Thanks for any thoughts.
See pic. Mustang fuel rail on left/top; Explorer rail on right/bottom. Explorer rail is deeper for sure. I am going to use the Mustang fuel rail.I don't know if you need them as they would be inside the fuel rail and I am not sure what they would seal against. Maybe the explorer fuel rail is different than the Mustang.
I will have to check some of the explorer injectors I have in the garage.
Thanks much - look forward to what you find!The explorer o-rings are the same. These are somewhat standard.
If we could determine what -dash number these o-rings are you could likely buy a bag of Viton o-rings for $5 and have a hundred or so.
I’ll need to check my Parker o-ring book on chemical compatibility and see if I can find a size.
Yes, I think you are correct. The Amazon link you sent does not have the top small o-ring unless I am missing something. Thanks.The o-ring pushes against the top of the bell when you fasten the rail down.
Yes, I think you are correct. The Amazon link you sent does not have the top small o-ring unless I am missing something. Thanks.
Are you thinking that the 0-203 o-ring (from your pic) should seal into the fuel rail and therefore I don’t need the smaller o-ring located above the 0-203 o-ring?The first image indicates that they're both 14mm and the same size as the one on the bottom.
I can't account for the size variation on the one you're looking at however, if you have an o-ring that is equal in size or smaller than the shoulder at the top of the injector and fits inside of the bell, then it should work perfectly.
Are you thinking that the 0-203 o-ring (from your pic) should seal into the fuel rail and therefore I don’t need the smaller o-ring located above the 0-203 o-ring?
I will install the injectors and rail into the manifold, apply fuel pressure from the tank/pump and report if I see any leaks - hopefully that will tell if they are sealing properly.Test it of course, but yeah... If that O-ring stays on the shoulder when pressed into the bell then it should seal.
See pics with the measurements. Does this help?Nitrile (Buna-N) and Viton show compatibility with Gasoline.
Does appear to be a -203 o-ring. Only unknown is hardness. 70 and 90 seem to be common but I don't have anything to measure this particular O-ring but given the use i'd probably lean 90
Seems like you can get a bag of 100 for $5 plus shipping.
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Not sure which one I can recommend here without testing myself. Given that these are fuel systems, the risk is high. But given that, I can't help but think most of these injector rebuild kits are probably using the cheapest O-rings possible.
I will have to report back on that once I get the wiring fully installed. I just ran power directly to the pump with a battery to see if there was a leak at the fuel rail. Should have the ignition operational in a week or two.Could be a leak somewhere or could be the regulator allowing fuel to return below the preset pressure.
What happens when you turn the ignition switch to the [run] position without going to start? Does it build full pressure?
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