12.7 detroit 60 series running too hot

That’s how it starts on big pulls. Whether it’s less air flow or less coolant flow. Hot summer days. Winter no problem,

 

If it’s blocked air flow, A/C might not work as well when parked. Condenser may stay hot from high pressure. Causing the engine fan to run more. Can’t pull air through radiator. A/C works fine going down the road. Plenty air hitting it.

 

Just a thought - not doubting you are having a cooling issue, but I'm a real fan of the 'Scan Guage' - doesn't have to be the KR version, just the regular one for diesels, because it gives an accurate reading of temps/oil pressure etc, from the ECM - to compare to your dash gauges.

It's helpful to me with an older Pete where the gauges are 5% or more off.

 

Did you just install the pyrometer since this started, or always had it and always hit 1k? 1000* is pretty hot. Do you have a tuner on it?

Definitely the clogged radiator as mentioned above, but A/C is usually a complaint there too.

Yes, You can have issues with a turbo that quick.

Has your engine oil temp increased also?

 

I'd check the water pump also. I'm driving a glider with a 1996 12.7 ,truck is a 2017. It's had 5 water pumps in 833,000 miles the last one went out quickly, started pouring out the weep hole. This one was put on , it's a reman from Detroit it didn't make it out of the shop ,started dripping out weep hole. Got another from Detroit and it's been doing good. I'd better knock on my simulated wood grain dash Lol. Someone told me the impeller is a press fit on the shift and it can slip, don't know for sure but they are definitely a crap shoot to get a good one.

 

Don’t know exactly how you checked the Cac. Make sure the 1” air intake hose from air compressor to manifold isn’t leaking. Usually it fails and leaks at the compressor. It’s often plumbed in on the back side of compressor, between compressor and block. It’s hard to see and access.

 

So please tell me you’re going to check the valve lash before you pull the head…. It’s fairly common for Detroits to get to where the intake valves are almost open because of wear….they only start at.006 if I remember right….we usually set them at 10