I have been experiencing a problem with heat under the hood under any driving condition. My engine coolant temp when the truck is warmed up reads 190 degrees and stays around 190 degrees all the time. That hasn't alarmed me as much as everything around the radiator area is really hot!!! even 30 minutes after shutting off the engine. The innercoolers are piping hot, the front of the hood is hot. I discovered tonight that this situation is not normal. I went for a ride in a 1998 3500 24v with a BD Box stacked with a TST 3 set on #9 for probably 15 miles of WOT running. We got back to the shop and raised the hood. His egt's were already 300 degrees (I have to wait at least 2 minutes to get down to 400 degrees and only if in park!!) and everything on my truck was still hotter than than his. Someone please advise me with some information to remedy this problem.<br><br>Meacham Evins<br> ??? :'( ??? :'( ??? :'( ??? :'( ??? :'( ??? :'(

 

This started after the injector and turbo change?

 

Stakeman,<br> This has been going on for quite some time. With 275's and my ATS Hybrid charger it was also hot and I just thought it was normal. My pyro just driving slowly thru town would go to 800 or 900 degrees. When I would stop in traffic my egt's would be around 400 degrees an climb to about 450 stopped. I would have to shift to neutral for my egt's to fallo to 400. The problem I have experienced with my new injectors is stumbling at the top of my lower gears at WOT. I have started a new topic in high performance forum.<br><br>Thanks,<br><br>Meacham Evins

 

Are your coolers plugged? Just for fun, hose all of them out real good and see if that helps. Couldn't hurt anything.

 

The 400 to 450 EGT's at a stop light is what I see as well.

 

Clean the bugs out of the radiator fins.

 

[quote author=ProspectorTim link=board=4;threadid=17134;start=0#msg173420 date=1061089558]
Clean the bugs out of the radiator fins.
[/quote]

and check for oil build up on the back of the radiator from oil blow by from the puke tube.

its known to cause major overheating problems :-[

 

For mine to drop below 400[sup]o[/sup] I have to have it in PARK.

 

Hi Meacham,

High rpm stumble could be a fuel delivery problem to the pump. Pressure ok?

Smaller wheel turbos with tighter housings are just gonna run warmer and take longer to shed heat at idle.

For example, my cruise EGT's with a HX40 were around 900 @ 70MPH. Moved to a HX55 and they went to 600. As soon as I pull into the driveway...the truck is at 300 degrees with the 55. I never got it go to 300 with the HX40.

You are well within the operating temps. A higher temp is good overall when cruising, within reason. It helps to burn everything you are putting in with more efficiency. Hot oil, again within reason, is good too.... burns off more junk in the oil and engine.

Shutdown temps are more critical because of thrust bearing coking, but below 400...you are , IMO..ok!

Transmission troubles can also put more heat into the mix. Do you have a tranny temp gauge?

Don~

 

mcevins: An interesting point would be to watch temps in N and in P. In both situations there should be no load on the tranny, and AFAIK only in N fluid is pumped through the coolers ( dunno if ATS does change this with their VB)
This way you can determine whether there is heat buildup because of tranny drag and this heat is transferred to the engine and to the coolers.

To clean the coolers is sound advice, I'd also check for boost leaks.

AlpineRAM

 

[quote author=Bob Wagner link=board=4;threadid=17134;start=0#msg173437 date=1061092024]
[quote author=ProspectorTim link=board=4;threadid=17134;start=0#msg173420 date=1061089558]
Clean the bugs out of the radiator fins.
[/quote]

and check for oil build up on the back of the radiator from oil blow by from the puke tube.

its known to cause major overheating problems :-[
[/quote]

Bob Great advise. I changed the location of the puke tube a year ago. Last week I pulled out the radiator, and to my surprise I found the radiator clogged about 20% full of sand and stuff from the oil tube dump the year before. So I used simple green and a pressure washer on low it worked great. OverFueled