706_from-da_woods
Member
I read a few reports of folks using Ford 7.3 glow plugs (ZD-11) but I hear different reports of what die size/pitch to use on the Ford glow plugs. Has anyone here done it?
- Thread starter 706_from-da_woods
- Start date
Dieseltech
Well-known Member
- Location
- Akron, Indiana
I have those in my 560D I use on tractor drives. All you need to do is two things, run a SHARP 3/8 inch die over the new plug threads so they will fit the injector body. Each wire end needs changed to bullet type. Mine will start now cold with 12-15 seconds heating now.
706_from-da_woods
Member
I can't get a 3/8 inch die anywhere neer the threads. It seems that these are 1/8 / NPT? I can turn that on the OEM by hand part way over one I took out.
Dieseltech
Well-known Member
- Location
- Akron, Indiana
Plugs are NOT 1/8 pipe, but 3/8 X 24 fine thread. Plug seals compression on the lower tapered seat. The die will be a challenge to get past the center where the part number is stamped, but the die will work by turning it there also. Have several other IH engines done just like mine.
706_from-da_woods
Member
That's is what I've read, but the die at the top (see photo)is the 1/8 NPT 27 that I threaded on by hand until it stopped. The second die is the 3/8 NF24 and it won't even begin to go over the shafts - it's too small.....
Dieseltech
Well-known Member
- Location
- Akron, Indiana
The 3/8 X 24 die went over the new plugs for me fine, you are using on old original plug...
706_from-da_woods
Member
OK, I still don't understand why the 3/8 NF24 doesn't slip up to the threads - but I confirmed the 3/8 NF24 tap does thread into the glow plug hole. I'll buy the ones for the 7.3, re-thread them with the die, and run new wires to the whole setup.
Thanks!
Thanks!
Dieseltech
Well-known Member
- Location
- Akron, Indiana
Simple, the OLD original plugs are larger, and threads were probably rolled instead of cut.
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