Class C Diesel MPG Question

Explorer1016 wrote:
The major problems with the 6.0 were from head bolts and those caused head gasket issues and that caused coolant issues and EGR cooler leaks and so on.
The 6.7 is still not a match for the DuraMax. GM has bought out Isuzu's stake in the Dmax and it has been the same engine since 2000 with the Allison 1000 trany. Ford has gone through 4 diesels to try to match the DMax and the Cummins. I only have a Ford because of the type of RV'ing we do and needed 4x4, otherwise I would have stayed with a GM product.

I owned 3 DMax pickups (2000, 2006, 2011) I drove a cumulative mileage of almost 400,000 miles towing and working those trucks. The biggest problem I had was with the 2006. Had to replace injectors but it was a warranty issue. Really didn't have to spend money for any other repair issues.


If Ford can keep the 6.7 on the road for 15 years without any issues then it can be said it is a great engine. Right now GM and Cummins are way ahead of Ford in the reliability department.

Also, the 6.7L PSD is rumored to be the most expensive engine build in the market trying to meet emmisions.

x 2 The basic design flaw/limiting factor of the 6.0 and 6.4 Navistar sourced engines is that they are built with only 4 head bolts around each hole as opposed to the 6 bolts found in most medium duty diesels such as the B Series Cummins or the Duramax.

The aftermarket has come out with stud kits and improved head gaskets which will allow the 6.0 and 6.4L Navistars to live much longer, and EGR delete kits (which may adversly affect vehicle emissions) to improve reliability.

There are several Fords around here which have had a B Series Cummins transplanted, in fact the aftermarket is selling kits to simplify the install and interface.

A King Ranch with Cummins power driving the reliable Ford 5 speed Torqshift would be a sweet machine.