- Jun 5, 2008
- Boat Info
- 2014 Princess 56 Fly & 2002 Sea Ray 225 Weekender
- MAN R6 800s & Bravo III 5.0L
Thanks. So if I’m understanding this right, Cummins put those on QSMs but not on QSBs or QSCs, and that is why QSCs and QSBs require the regular dissimilar metal maintenance with the grease on the ACs but QSMs do not?
(Edited) Looks like it may have more to do with the QSM AC core being rectangular and sandwiched between the two halves of the housing, as opposed to the QSB and QSC core being a cylinder that is contained in a cylindrical housing with round caps at each end.