680246C1 Injector Return Hose
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Mountain Pass
Joined: Dec 2010
Posts: 148
Likes: 0
From: Holland, VA
680246C1 Injector Return Hose
I just bought a sixteen foot roll of OEM/International Injector fuel return hose for $12.99 I thought that was a pretty good price from the local IH Dealer.
Now to work on that air intrusion problem.......
Now to work on that air intrusion problem.......
Postmaster
Joined: Jan 2010
Posts: 4,319
Likes: 4
From: Elk City, OK
line is just the start bud. if your return line caps are fine then you will need to replace the O rings under them. there are 2 per injector. they get hard, brittle and split over time. usually the second you spin a cap or move it at all it will start leaking.
Cargo Master
Joined: Feb 2010
Posts: 3,493
Likes: 3
From: NY
Yes, make sure you lube o-rings with petroleum jelly too. Thoroughly inspect each cap to make sure none of them are cracked and are in good health. Take your time and don't take short cuts. If the hoses are not completely on the plastic barbs-it will leak. If cap is moved or played around with once installed-it will leak. If you force o-rings on in rage and nic them-it will leak. If you look at them the wrong way once installed-it will leak.
Not trying to scare ya but they are a pain to get leak free.
Not trying to scare ya but they are a pain to get leak free.
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Mountain Pass
Joined: Dec 2010
Posts: 148
Likes: 0
From: Holland, VA
Pull the caps again?
So should I pull all the caps and replace the two week old o-rings when I replace the return hose?
Can a cap/o-ring suck air and NOT leak fuel after it's disturbed?
Pulling the caps and replacing the o-ring is not that big of a deal compared to crappy cold morning starts.
Can a cap/o-ring suck air and NOT leak fuel after it's disturbed?
Pulling the caps and replacing the o-ring is not that big of a deal compared to crappy cold morning starts.
Cargo Master
Joined: Feb 2010
Posts: 3,493
Likes: 3
From: NY
I would, one little bump while putting new lines on and you start it up and it leaks. And then you replace the o-rings on that one thats leaking and you bump the other cap and that starts to leak. I put new injectors on about a month ago and I was just fixing another leak yesterday due to bumping a cap. And then when I took the hose off that cap it moved the other cap and that started leaking too. Sorry if it sounds like a rant but they will drive you nuts. Just wait till you get them leak free-you'll feel like you hit the jackpot.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
If you have driven it much, the hot fuel don't take long to make the O rings just hard enough that they don't reseal.
Almost no pressure on the return line with huge fuel molecules when the engine is running.
When you shut the engine down, vacuum holds the fuel up in the return lines, with tiny air molecules trying to get in and break the vacuum.
If you have fuel leaking out of the return lines, then either the return line is blocked before the tank or you have a very bad case of air intrusion.
Almost no pressure on the return line with huge fuel molecules when the engine is running.
When you shut the engine down, vacuum holds the fuel up in the return lines, with tiny air molecules trying to get in and break the vacuum.
If you have fuel leaking out of the return lines, then either the return line is blocked before the tank or you have a very bad case of air intrusion.
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Thread Starter
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Mountain Pass
Joined: Dec 2010
Posts: 148
Likes: 0
From: Holland, VA
Roger......
If I'm pulling caps today I'm going out first and getting the vitron o-rings. I have another set of OEM o-rings..........but I'll spring for the better sealing o-rings.
More Turbo
Joined: May 2010
Posts: 618
Likes: 3
From: Grand Rapids
After that, my newly installed GP's gave up just a few days ago (Electrical feed problem I'm sure). After messing around with one injector cap in the cold I wasn't in the mood to go messing with small screws and wires so I'm cold starting with ether. A 3 second burst and she starts first crack. (Actually she starts better with the ether) Less cranking which is good for the starter and the batteries.
