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So the other day I replaced the 3/4" heater hose with the correct 5/8". Then installed the new thermostat #14077122, which is a 190° acdelco unit (from the dealership). Then poured in another bottle of water wetter. Today I drove a 150 mile trip. 75 of which I had 1000LBS of steel in the bed...

Well as it turns out you may have bin on to something. When I did the crossover swap I also replaced the heater hoses. The problem is I eyeballed the size of them as 3/4". As it turns out only one is 3/4" and the other, along with the bypass hose are 5/8"but I just put the 3/4"s on anyway. When...

Yeah I was reading in the TM's that normal operating temp is in between 190° & 230°. That just seems ah little excessive to me? Are diesels supposed to run hotter then gassers? Also I plan on installing ah banks turbo kit in the near future. Knowing that turbo's produce ah lot of underhood heat...

No I'm sure it's full. I've bin driving it for ah week or so now and the reservoir has long sense leveled out. I can't imagine there's any more air to purge out.

180° or 190° thermostat?????? My other thread was getting ah little diluted so I figured I'd ask here..... After doing the HMMWV cross over swap, and installing the temp gauge in it. It's bin getting ah little over 200° when I'm driving down the highway at 70+ MPH (Gear Vendors). But when I...

Okay I found this "original" GM part number is this correct? (14077122)

Okay so now I'm having a new problem. Over the past few days I've bin able to drive the truck on the highway (empty). The temp is getting just past 200 degrees at a constant speed of 65-70 MPH (Gear vendors), but then cool back down once I come to a stop or slow to around 55 MPH for ah while...

I wouldn't trust an Auto zone part on my vehicle even if it did eventually show up.2cents

There's several of them on Ebay for under $50.00 to your door. just search HMMWV.

Agree on most cars I recall seeing always had the sensor just down stream from the thermostat. Thus as AECS said it should be the hottest part of the system.

From the factory these trucks didn't come with ah temp gauge or any reasonable place to install the sensor. The 6.2 in the HMWWV's had electric fans, temp gauge , and some other gadgets I'm not sure of. So the crossover tubes for them have 3 extra threaded bosses cast into them, allowing you to...

Another thing you mite want to check is the length of the probe for your gauge. The cheap Bosch mechanical gauge I have had a pretty long one . I don't think it would have fit in the top horizontal part of the crossover. All things considered It really wasn't worth it to me to have the truck out...

I suppose you could try? The only problem I would foresee would be do to the fact that it is pretty thin and made of cast aluminum. So it could crack or simply not have enough thickness to get any threads on. But if it did mess up you could have one on your doorstep for around $50.00 off ebay.

You lost me? do you mean a 180 thermostat rather the 195?

Yah need to use the liquid thread sealant. I bought some ah few months ago and now I'll never use the tape again. Works VERY well!

I just put ah bottle of water wetter in yesterday, I haven't driven it yet to see, but it should drop the temp ah few degree's.....http://shop.advanceautoparts.com/p/red-line-waterwetter-80204/7120012-P?searchTerm=redline&zoneAssigned=1

If your interested in an aluminum rad. I'll be ordering one from these guy's when the time comes..............http://www.buyaradiator.com/i-s-2098aa.html

So I did the HMMWV coolant crossover swap ah couple days ago so I would have a better location to install my temp gauge probe. I had it installed in the port on the water pump ,but because of the cooler water flowing into the pump at that point . My reading was always 160. Now that I have it...