Wow, it's been a month already. Been chasing a problem about the beast going into Limp-in mode and tried a couple things...
Checked boost hoses for leaks. all good.
Checked vacuum reservoir solenoid. it's good
Connected the electric radiator fan up again. maybe made a difference but didn't cure the Limp-in mode.
Checked mechanical fan clutch. not in such good shape.
I've never liked fan clutches and never understood what good they do. 50 years ago I changed a Datsun clutch fan to a mechanical fan and drove away happy.
Now I've done it with this Jeep and I'll see what happens.
Drilled 4 pilot holes through the 4 clutch fan mounting bolt holes and avoided damaging the threads.
The drill went through the clutch assembly and the clutch disk.
Flipped the clutch assembly over and drilled 4 clearance holes for longer bolts to go through the clutch housing and the clutch disk. Ran a tap through the holes just to clean them up.
Got some longer bolts (5/16-18x1" NC) and ran them in through the clutch housing and the clutch disk.
Reinstalled the fan onto the fan clutch assembly which is now a pure mechanical fan. All seems fine so far.
If this doesn't fix it, then I will have to check the turbocharger waste gate. It could be leaking...
Ordered a $58 Viscous Heater delete kit from IDParts. I didn't notice at first that it also deletes the mechanical fan.
Sent them a message to see if they can provide a serpentine belt that bypasses the Viscous Heater but still runs the mechanical fan. I don't like the idea of relying on an electric fan to cool the engine.
Dean.