Truck as below. I'm running a "cold front" on it, just as I did last year. This year despite the cold weather, it's taking forever for the EGTs to get below 400. I typically cool it to 385 before I shut it off. Coolant is full, nothing else has been done recently to the truck. Any ideas why cooling is so much slower this winter than last?

 

Thermostat stuck? what's the trans temp look like? the only other thing would be Water pump

 

Tranny acts normal. You may be onto something with the water pump idea. The problem seems somewhat intermittent, cooling normally sometimes and very poorly others. The other day, I had to add coolant for the first time in nearly a year when I found the reservoir almost completely empty. I filled it back to the normal level, only to find the reservoir completely full the next day. Is that that the pump working intermittently?

 

It could be , I know the blades will chip away so full operation wont be the same, what is your oil coolant temps? are you sure your not loosing coolant internally?

 

I have the BPD external oil cooler, they're normal, and I don't think have anything to do with this picture. I don't know for a fact that I'm not losing coolant internally, but I do have studs, new head gaskets 2 years ago, and I've been monitoring the coolant pressures fôr about 2 weeks with no pressure over 15 and no response to hard acceleration.

 

How long has the thermostat been in and is it OEM?

 

You're asking about EGT and the topic immediately went to ECT?

Josh

 

These turbos are very TUFF Temps don't seam to have much effect on them


I would worry more about overheat then Cooldown especialy if your already down to 400-600* range upon shutdown


The only time I would worry about proper cooldown is if youjust climbed Mt Everest pullen 15K you wouldn't want to shut it down immediately


Theres Tons of folks out there with no EGT gauges that just shut down no matter the temp and have 0 turbo problem from excessive heat




IMO an EGT gauge would be more for keeping an eye out for an Overfuel condition from bad inject maybe a Hot Tune

 

So could it bethe case you have an Aftermarket Turbo???

 

Nothing wrong with 400° at shutdown....maybe your temp probe or gauge is acting up, hence the difference?

 

Nah, stock turbo.

 

I was thinking the same thing....

 

I see your point. EGT is the concern and I assume that you're saying that poorly circulating coolant will not affect EGTs?

 

Agree on the 400. The problem is getting it there. It'll take 2 minutes to go from 500 to 400 sometimes. It never took that long to cool from ANY temp a few weeks ago.

 

No, it isn't going to affect the EGT