BlackGMC

iTrader: (31)

Well my truck has been running alot hotter in the 100*+ temps... But it is wierd... It will sit and idle all day long with the AC on high and run at 200* basically where the fans regulate it. While driving down the highway it runs at 197* which is also fine. Now if i am in stop and go traffic it will get to 215-220. Today on the way home I was beating on it to see how hot it would get, well when i pulled into my drive it was 224*.... So i left it running in park in my driveway and the temps came back down to 200*....


So i tried pulling some timing, basically adding more the ECT and IAT tables, that helped a little bit but it still gets hot in slow driving... I have a 28" rad with homemade efans (12 and 14) with a shroud... So i am just thinking about ordering some 05 efans and 34 radiator...

Any opinions?

A Low Dime

iTrader: (13)

Same thing happens in my truck. I can sit in a 100* parking lot for 1 solid hour idling with A/C on high and temperature not climb over 190 but stop and go it will climb to 205-210

2007chevy5.3l

iTrader: (21)

Try the 05 efans and radiator and go from there if you still have problems. Just my opinion

BlackGMC

iTrader: (31)

Oh and it is not the verter causing it because i bypassed the radiator. But i am thinking that big *** 40k cooler sitting right in front with 160-180* fluid following threw it is not helping the situation either...

00ChevyScott

iTrader: (10)

I don't think anything under 230 is serious.

BlackGMC

iTrader: (31)

Kinda what i was thinking, i was still shifting at 6700 and it was pulling just as hard as it usually does...

2007chevy5.3l

iTrader: (21)

I was thinking the same when i put on my 40k. After driving around in 100+ deg heat the engine temp wont go up. But my fans do push alott of air lol

thunder550

iTrader: (70)

You have a stock thermostat? I had a 160 and a 180 and during the summer my truck would try to overheat on me all the time (with 34" radiator, and with both factory e-fans and a factory clutch fan). As soon as I went back to stock it's all fixed. I think the coolant was not spending enough time in the radiator to cool down properly.

BlackGMC

iTrader: (31)

yep stock thremo

KySilverado

iTrader: (7)

The PCM will tell you when its to hot. DING DING DING... and if you ignore it you'll soon be in limp mode.