We experienced this exact scenario when towing our 3800lbs camper. On accel from a stop, it feels like a vibration in the driveline. Dealer saw irregular shift patterns in the trans, so pulled and completely rebuilt it. Still having the same issue. I'm curious as to if there is a TSB for this...
Well, they pressure tested and replaced the EGR cooler, claiming that it was leaking. However, I continued to see the coolant level drop below the minimum. Finally, they used a boriscope to look into the cylinders and well, you know the rest.
Yes sir it is. However, itās incredibly concerning. The service manager said this was the first 2.3 he had seen do this. They supposedly fixed this issue.
My 24 XL (31,500m) has been low on coolant several times. Each time, the dealer checks and can find nothing wrong. Welp, today three days before we are supposed to tow our camper 2,000 miles, I went for an oil change, and to have fluids checked. The found the leak, coolant in cyl#2. Not a lot...
Hereās a simple explanation. Iām sure you could find more by doing a search.
https://bobistheoilguy.com/forums/threads/exactly-how-does-a-bypass-valve-work.23682/