What temp should the 6.2 run??

[Retiredwarhorses]

I have direct reading auto meter gauges in both of my cucv's taking a reading off the water pump. Both read below 180 hear in Colorado. To me it seems like the typical cucv with a good functioning cooling system runs on the cool side. I'm considering changing the tstats over to 160 degree units so I get some more heat.

not sure why everyone is trying to cool down a Diesel engine, please remember how they work, these are not gas engines.
you need fuel, air, heat and pressure....thus the heat makes for efficient combustion. It's not healthy for the engines to not reach operating temp. In the case of the 6.2, 6.5NA and 6.5TD, it's 195-210.
the Tstat on the 6.2 and 6.5 is 180 deg...

another disturbing trend Im seeing is the amount of work people are doing on the cooling system because of gauge readings...I cannot say it any clearer, check the temps with a laser or thermometer. These gauges are way off.
i cannot tell you the number of calls per week in the shop I get...and even after telling them to spend 20.00 at harbor freight for this tool, they end up replacing half the cooling system and 3 days of work or more....then and only then do they find that the temp is actually about 185-205.

 

[2w091]

Does the 195-210 go for the 6.5 as well? Mine runs 210-220ish, the aux fan kicks on and off quite a bit.
I think at one time my thermostat was stuck open, it wouldn't run more than 180, but the problem seems to have stopped.

 

[kojo0513]

That's about what I run lol

 

[2w091]

Here is what it's running, with what's stated here I'm assuming we're good...........
1995 6.5L M1025A2

 

[RustyM923]

235 indicated. 195 to 205 actual (depends where I laser measure). If your fan is kicking on and off regularly, you're probably in good shape

 

[Aerialfred]

not sure why everyone is trying to cool down a Diesel engine, please remember how they work, these are not gas engines.
you need fuel, air, heat and pressure....thus the heat makes for efficient combustion. It's not healthy for the engines to not reach operating temp. In the case of the 6.2, 6.5NA and 6.5TD, it's 195-210.
the Tstat on the 6.2 and 6.5 is 180 deg...

another disturbing trend Im seeing is the amount of work people are doing on the cooling system because of gauge readings...I cannot say it any clearer, check the temps with a laser or thermometer. These gauges are way off.
i cannot tell you the number of calls per week in the shop I get...and even after telling them to spend 20.00 at harbor freight for this tool, they end up replacing half the cooling system and 3 days of work or more....then and only then do they find that the temp is actually about 185-205.

Got the Harbor tool like you suggested. I checked the temp at the stat housing, radi intake, and all over. Highest readings were 178-180 degrees. Worried for nothing I suppose. I just need to stay cool. Ha!

Thanks!

 

[Retiredwarhorses]

Got the Harbor tool like you suggested. I checked the temp at the stat housing, radi intake, and all over. Highest readings were 178-180 degrees. Worried for nothing I suppose. I just need to stay cool. Ha!

Thanks!

right on brotha....at least one confirmed listener...LOL

To be honest, I'd did have another, just not on this forum, he had found the same as you.

 

[Aerialfred]

right on brotha....at least one confirmed listener...LOL

To be honest, I'd did have another, just not on this forum, he had found the same as you.

I hear and learn.

 

[Aerialfred]

Also figured out after speaking with someone I had the wrong fan on mine. I ordered a reverse rotation fan and installed it on my serpentine setup last week. Now, instead of blowing air out the front, it is pulling air in the way it should.

 

[Retiredwarhorses]

If its a serp setup you get a new fan blade,waterpump and backing plate...it all goes in the oposite direction then the V-belt setup.

 

[Mike82ndABN]

Got the Harbor tool like you suggested. I checked the temp at the stat housing, radi intake, and all over. Highest readings were 178-180 degrees. Worried for nothing I suppose. I just need to stay cool. Ha!

Thanks!

I ended up getting one of these as a gift, love it, i've been reading temps on radiator hoses, tires/tread, the hubs, and diffs, transmission pan, transfer case. Trying to figure out a baseline temp for each so that maybe one day I can catch a problem early.

 

[Aerialfred]

The 6.5 NA came with the serp setup from the military, but had the wrong fan. The system turns clockwise, so I had to put the reverse rotation fan on to get it to pull air through the rad. So is this incorrect Retiredwarhorses?