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Thats what I thought. I am pretty sure I can repair them, but I need some samples to work with.

Any chance you could send me the old one? so I can investigate?

How much did it cost you? Was it an exact plug in for the military model?

for running 100% veggie, you will need a startup tank as well, I am sure you are aware...

gotcha... if your tubing is rated for 200 degrees, 80 PSI, you should be fine. Your cooling system shouldnt generate more than around 15 PSI I think. do you run your truck for long periods of time? or would biodiesel be better?

what are you heating?

Most experts say 200 is perfect...

That will work, but I would suggest changing the glow plugs out then, with 'self limiting' ones, so you dont (or someone else) leave them on too long, and swell the plugs. It is a nightmare getting sweleld plugs out. check out www.ssdieselsupply.com (think thats the link) for self limiting ones.

That is the most common problem with the glow plug system on teh CUCV's From what I understand, its actually pretty rare to find a good one these days. You can test the glow plug relay by determining which of the 2 small terminals are ground, and supply voltage to the other one. Dont leave...

its up under the dash, near the steering column. From what I understand, its a circuit board type card that might have a black plastic box around it, maybe 1" high by 3" wide, by 3-4 in the other direction (wire end to opposite end)

Glow plug controller under the dash is probably shot. Another member here has been testing repairs on them. If you are interested, send me the controller and I can attempt to fix it. (I dont have a bad one to work on, and the other member worked on his himself)