broke down need a shop

[Rawze]

(10-25-2017 )Sasquatch Wrote:  while pulling a hill with a 40,000 load, it made an unusual squeal, and started loosing oil pressure, as I eased up and got up the hill to the off ramp the oil pressure was down to about 20psi, and was knocking, but boost pressure, coolant temp, and exhaust temp were all good. I limped it to the fuel stop on that exit, and shut it off. Checked oil and it wouldn't even touch the dip stick, it was about 3 gallons low by that time. ( I found that out later when towed to shop and we checked the level by adding oil.) but when I tried to turn over engine while still hit, it was very labored and would not hardly even turn. After cooking over night it did start up, after the mechanic made sure the turbo had not filled the air charger with oil. But at this point we haven't opened it the rest of the way. But it is knocking really bad, and the engine has no oil pressure even though there is oil now.,

It sounds to me like it ran low of oil pressure first (most likely from 3 gallons low). Once that happened and it dropped pressure, the turbo squealed and it starved it of oil to the cooling nozzles and overheated the cylinders and pistons, spun a bearing, and the rest was over. Running it again after putting oil back in was not wise at all, and continued to cause damage.

Only real question,... When was the last time you checked the oil before this happened? If it was several days, then it could have been just about anyones guess as to where the oil went.