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It think the rubber is a fairly decent conductor of tempeture once it is at operating temp but, thats just me. i haven't had a chance to run it again to check temps at the coolant bottle. It did run for quite a while the other day at idle and during a drive and it did not overheat like it was...

Test drive seems ok. The fan is coming on periodically as usual. I recently installed a new gauge and it is reading around 220 F, or the line right after the 200F mark (seemed a little high to me). When i take a reading with an infared temp gun on the engine it reads right around 185-200F at...

Thanks for the tips. i did have the wrong thermostat in there. gonna test drive it in a few minutes with the new one installed.

Are the thermostats in the crossover pipe specific to military hummers or can i use a normal chevy 6.2L thermostat? I have had some over heating issues on a recently rebuilt 6.2L.

Good news! after replacing the glow plugs with the correct wellman 24V plugs (and finding a loose connection on cyl #6) everything worked perfectly!! Thanks to everyone for their input! Im glad to have this nightmare out of my hair.

Well that is good news! thanks wirefox! I was just googleing those wellman plugs and found some for a reasonable price. I will call and make sure they are 24v first. The autolites looked just like the 24 v (with bullet connectors) that others offer so i thought it would work just the same. To 1...

ok, i just pulled one out and it is an autolite plug with the number 1108 on the bottom. not sure if anyone has a a part number that i could cross to see what i have here. Its been so long since i put them in that i dont remember where i got them.

Hopefully that is what my issue is. Any idea where to get 24 V glowplugs?

I bought the box from Eriks military surplus and it was listed as new never used matched set. It seems to be exactly what it said it was. new in box and in good condition. the temp sensor/controller had the yellow band on it but the box itself just had a white label with serial numbers on it. no...

So i know lots of people have posted about glow plug/preheat problems on this website because i have been reading as many as i can. I have been fixing a bunch of hummers that my boss has purchased for re-sale (20 to be exact) and this one has been putting up a real fight so i will give you the...