We have a 2006 Peterbilt 387 with a C-15 twin turbo engine. Driver was going down the road and heard a loud bang and thought it was a tire. After he realized it wasn't a tire, he thought it might be a broken rocker arm since it is knocking while the engine is running. He had it towed and serviceman told him it wasn't a turbo or a dropped injector (and didn't think it was a broken rocker arm) but he isn't certified to open a CAT motor so he hasn't actually looked inside the engine. The serviceman is guessing that it is (a) dropped pistons or (b) a bad head. He is suggesting that we convert it to a single turbo engine since twin turbos have so many issues. Should we get the engine switched over to a single turbo or just get head work done on the twin turbo?
We, of course, need this truck back on the road ASAP so any advice on which would be the most cost effective in the long run is greatly appreciated. Thanks!