New ISX motor ?

[Camstyn]

Makes sense about the turbo/exhaust noise, hadn’t thought of that. It was probably just a lot less noticeable on the Paccar because of the under-hood air cleaner.

Oil temp seems to hover around 225. Still a little concerned about the jake performance, as from everything I’ve heard it’s supposed to be very impressive and it’s not, at all. Works good enough for the light duty work we’re doing but it doesn’t seem right.