I would be leery of mixing different # glow plugs,I had one Autolite one melt in two shortly after I put it in my 6.2,the other cylinders had AC 60G's...I heard from a diesel tech if one glow plug has different resistance or one fails,it can cause one or more of the rest, to get too hot and fail...
13G's will probably swell up if used with a manual control switch too..
Leery or not, that's what I have at this junction. The cold resistance is similar (don't have an easy way of measuring hot resistance). And the Duraterms are rated to continuously handle 12V, so having a mismatched plug should not harm the other plugs.
I'd be much more concerned with the CUCV resister bank causing issues. These aren't 24V plugs, but they are getting 24V when the circuit is unloaded. Correct me if I'm wrong, but as each plug burns out, that resister bank gets progressively less effective at lowering the voltage (bringing it closer and closer to the static value of 24V). So if it drops the voltage from 24V-->12V with 8 plugs' worth of current, 4 plugs' worth of current should produce a voltage of 18V. Which is significantly above the rating for these plugs. I think that is why the plugs seemed to all fail at once. Each plug failure raised the voltage and caused the next one to burn out. I had easy starting, and then I had no starting. Rather quickly.
I'm strongly tempted to yank out the resister bank and run the plugs off of the 12V power system like the civilian trucks do (to eliminate this issue). Running 12V plugs with 24V is as screwy as running the 6V 9G plugs with 12V (like the civilian trucks did). But as long as it's working I am inclined to leave it alone. For now.

I'm referring to the one with muddy title history. I was under the impression that you cannot register that one with a reasonable amount of effort. Maybe things have changed since we talked.




