Engine Temps How Hot Is Too Hot

[101st ABN]

Towing my jet ski's and boat from so cal to lake powell outside temps 100*+. Experienced engine temperatures of 220- 226 while pulling hills. How hot is too hot? Is this a normal operating temp?

 

[MCummings]

I wouldn't consider that too hot at all. If it's in the safe range, keep on trucking. Then again, I have blown up a few motors. hehe (not form overheating though.



What were the EGT's? High RPM, High Boost, High EGT makes for High water temps.



Merrick

 

[101st ABN]

EGTs were max 1320 rpms 2000- 2300 thanks for the reply.

 

[Motorhead]

1320 EGT sounds TOO high!

 

[roperteacher]

I pull a 3 horse living quarters gooseneck loaded with three horses in it. The hottest I have ever seen was pulling in Baker CA and it got to about 210 on the guage... Min never gets over about one needle length past the half on the guage and that was with Max air on...

 

[DieselFiend]

1320 isn't too high at all. 1400 is too high. I've seen my temp gauge go up to about 220 this summer. thats pulling a 25 ft TT. You're not alone and I don't think it's bad.

 

[rbattelle]

All-iron engines are highly resilient when it comes to "overheating". It's the all-aluminum or CI/AL engines you have to worry about. [Side note: a reason I don't like the Duramax or the Ford 6. 0/6. 4 engines... aluminum heads. ]

220-226 isn't too hot, although it's hotter than a stock truck with stock sized tires is likely to get.

I think it would be fine to run at that temperature.

Ryan

 

[MCummings]

1400* is "a ok" for Common Rails. The older motors could not run that hot. Just don't tell my '98 that!



My Dads '05 would get a needle width and a half over the middle when towing "hot 'n heavy".



What you don't want is, water temperature that continues to climb. Most trucks have a sweet spot. Just because one individual's truck runs at 200 when towing, doesn't mean yours will.



Merrick

 

[Sky]

How about transmission temps? How hot is to hot for the transmission?

 

[wcjp]

Try regearing? Your sig indicates 4. 10 gears with 37" tires. I'm also curious about the transmission temp. If you think the transmission got hot at all it's time to service the transmission now! Waiting any period of time will shorten the transmission life. The 37's sapped your power.

 

[BimmerAgent]

Altitude

I regularly see 220, and sometimes a little more, when pulling tandem over some of the mountain passes here. It's probably only 12K pounds with the fiver and boat or ATVs... . that engine just loves the pull, though. Doesn't mind the temp at all, much less anything else. Just runs up those passes. It's amazing to me how well that truck pulls. I never tire of it. Bruce

 

[steved]

Ummm, remember you could be seeing nothing more than a discrepency between the accuracy of the guage and the accuracy of the sending unit. If the guage is off o the high side and the sender is off to the high side, you might see a reading higher than actual temperatures.

With that said, I run 209*F (via a Granatelli Monitor) in 100*F weather unloaded, stock tires, cruising the highway at 65mph. I have "spiked" at well over 230*F (236*F), trying to regain momentum lost on a hill.

I have seen EGTs spike at over 1500*F for a few seconds (under load, usually coming out an offramp), average around 600-800*F depending on speed.

And all this is with a stock truck that I have ran this way for over 130k... and only recently installed the monitor to see what is really happening.

steved