How much to rebuild top end of engine?

That's true, usually cracks are from overheating

 

My M drive couldn't be even if you locked it in manual after a point it would up shift.

 

2800 under a braking load won't kill an engine unless there is already serious damage done to it. Throwing a rod would be the main thing to worry about, but under a braking load stresses are different than under a load.

That said ... what is happening is the lower end is worn out, especially at the rod journals. Which goes back to the rod failure, it is more likely happen now.

So the op is not filling in the rest of the story, like when does the oil light go on, what is the idle oil pressure and when was the last oil change.

Upper end causing this?

Maybe but not likely.

 

I don't think he ever touched the brakes. He had his headphones on and said he never heard the screaming engine ready to blow apart....

 

I've driven those junkers, they constantly over rev themselves at least with a paccar engine they do. Several times a day.

 

You might pose this same question in the mechanics are of this forum. Alot of good info there.
Heavy Duty Diesel Truck Mechanics Forum

 

You gonna get a lot of questions, and some opinions. What your not gonna get is answers. Go to the mechanics forum and ask there. Also unless your driving for a SMALL company or an owner ops truck. Why would you even think about considering paying for it?
Megas buy trucks by the dozen, and pay ####. Stuff like this is part of the reason why. They can afford to lose a engine or truck every now and then. Hell the money they save by only doing pm's every 40-60k instead of 12-15k can pay for several new trucks every month.

 

If it's a new head it's 5k for the part. Plus labor. North of 7k. Oil pressure is the oil pump or the o rings. The o-rings and oil manifold are like $400 plus the labor.

 

Headphones and apparently no presence of mind to occasionally look at your gauges. Sounds like negligence to me. I wouldn't expect you to pay, but I sure as hell would sue and get a judgment against you. I also wouldn't expect to collect. There's a difference between a breakdown and driving down the road with your head up your ###. I wouldn't expect to get a good reference either.

 

Employer may not legally be allowed to make him pay for repairs, but he can sure fire his arse. Which is exactly what I’d do if he didn’t offer to pony up for his mistake.