fuel return caps
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Junior User
Joined: Mar 2009
Posts: 94
Likes: 1
fuel return caps
Hi all, I'm new to this forum. Great to see all of the helpful posts. My question is simple. Do injectors for turbocharged engines require different return caps? I bought a return kit from dealer and have some leakage. A friend mentioned that he had to use different o-rings than what he got with a kit. I have an '89 F-250 Lariat, 7.3, aftermarket turbo, CTS I think and a Gear Vendors O/D. The engine ran great , no leaks. Glow plugs started to act up and while I was testing them I accidently broke a hose nipple off of a return cap.
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
Yes, the turbo trucks have a 'T' to allow the crossover in FRONT of the intake, instead of behind the intake on NA engines.
The o-rings are all the same. You need to make sure they're seated fully. Look at them all. They should all be within about an 1/8" of the injector shoulder.
The o-rings are all the same. You need to make sure they're seated fully. Look at them all. They should all be within about an 1/8" of the injector shoulder.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
ytlogger,
Welcome to FTE and the IDI diesel forum.
The caps are the same size as are the O rings.
But since the routing is different two caps have to be triple nipple instead of double nipple caps.
Welcome to FTE and the IDI diesel forum.
The caps are the same size as are the O rings.
But since the routing is different two caps have to be triple nipple instead of double nipple caps.
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Junior User
Joined: Mar 2009
Posts: 94
Likes: 1
I got a Dipaco kit from a Ford dealer. As I said my truck has an aftermarket turbo and has not had the turbo style return system installed. I can see the advantage so I will probably change over. Back to the Dipaco kit, the caps in the kit leak badly with the furnished o-rings. I put the kit o-rings in one of my existing caps and no leaks. Like I said, a friend had the same problem but didn't note the brand name. I used a couple of CAT o-rings from my misc. collection that were a little thicker, in the Dipaco cap that I used to replace the original that I broke and no leak. By the way Ford charged $105 Canadian for the kit.
