Return Caps Rev. 1.0
Thread Starter
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Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
My father bought a house here and he's moving out this way in the beginning of July. He's selling his old South Bend lathe and will be buying another lathe when he gets settled in here.
I am putting the 6.9L N/A sets on ebay.
I am putting the 6.9L N/A sets on ebay.
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
The caps pop into place and held by the orings. Also the injector line nut on the top ensures the cap can not pop off.
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Laughing Gas
Joined: Aug 2003
Posts: 919
Likes: 4
From: Newberg Oregon
and if you get vitons you can use the old nitrile ones and put one each on top of the injectors, install the line nuts and it will squeeze them down and they stay put., thats why i have vitons always.
Thread Starter
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Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
Finally...
We are in prototype development for the 7.3L IDI caps now. This includes turbo.
I found it interesting, the 7.3 caps have a larger diameter hole in the barbs, BUT the 90 degree bends have a small hole (identical size as 6.9L) penetrating the barrel and dumping into a larger size hole in the barbs! The straight through has a quirky elliptical hole that nets smaller than the barb as well!
I'm getting my hands on an old injector to do a section cut and ensure the hole through the barrel isn't on an oring. Dad is machining the larger barbs now - FINALLY bought all new machines. Barrels are machined, just waiting for hole location confirmation. Then it's time to solder.
I've run my brass caps since the day I installed them and still zero leaks. I haven't replaced the orings. And for the hell of it, I turned all of them multiple times to mimic bumping them while wrenching. Didn't cause a leak.
We are in prototype development for the 7.3L IDI caps now. This includes turbo.
I found it interesting, the 7.3 caps have a larger diameter hole in the barbs, BUT the 90 degree bends have a small hole (identical size as 6.9L) penetrating the barrel and dumping into a larger size hole in the barbs! The straight through has a quirky elliptical hole that nets smaller than the barb as well!
I'm getting my hands on an old injector to do a section cut and ensure the hole through the barrel isn't on an oring. Dad is machining the larger barbs now - FINALLY bought all new machines. Barrels are machined, just waiting for hole location confirmation. Then it's time to solder.
I've run my brass caps since the day I installed them and still zero leaks. I haven't replaced the orings. And for the hell of it, I turned all of them multiple times to mimic bumping them while wrenching. Didn't cause a leak.
Logistics Pro
Joined: Apr 2005
Posts: 4,221
Likes: 17
That's some nice work there!! 
They've finally arrived...
Sorry about the poor quality Samsung P&S pics... The caps turned out quite well. Revision 1.0 is a material change to brass. After I showed him the last round of backyard TIG welding, my dad decided to change materials and silver solder them himself. I couldn't get the flux off with the non-abrasive scotch brite pads I have.
Sorry about the poor quality Samsung P&S pics... The caps turned out quite well. Revision 1.0 is a material change to brass. After I showed him the last round of backyard TIG welding, my dad decided to change materials and silver solder them himself. I couldn't get the flux off with the non-abrasive scotch brite pads I have.