On Apr 5, 8:54�am, Wayne.B wrote:
On 5 Apr 2007 08:47:04 -0700, "Chuck Gould"

wrote:
Fortunately, the latest generations of electronically controlled
diesels don't seem to suffer from running at 1/3 throttle or so like
many of the older engines did.

I think the jury is still out on that. *Virtually all modern diesels
are turbo charged, and at 1/3 throttle the turbo is not making it up
to speed or temperature. *Traditionally this has resulted in
carbonization of the turbo bearings and premature failure.

I was always under the impression that coked turbo bearing were the
result of
inadequate cooling. If not adequately cooled, the lubricating oil
literally burns onto the bearing leaving deposits of carbon or "coke"
that begin grinding away at the surfaces. Wouldn't running the turbo
less expose the bearings to less chance of coking, rather than greater?