Originally Posted by Donald
These see a lot more idle time than your typical truck with a PSD. Wonder if that is part of the problem?
Yes idle time is a problem, and the emissions equipment makes it worse (this truck does not apply). Ambulances have a high idle function built in with the parking brake. That is much better for the engine than low speed idle.
Lots of idle time usually results in high valve train wear. The lifters were tired on this engine but rocker arms did not look bad. Cylinders themselves were in great shape for the hours.
These see a lot more idle time than your typical truck with a PSD. Wonder if that is part of the problem?
Yes idle time is a problem, and the emissions equipment makes it worse (this truck does not apply). Ambulances have a high idle function built in with the parking brake. That is much better for the engine than low speed idle.
Lots of idle time usually results in high valve train wear. The lifters were tired on this engine but rocker arms did not look bad. Cylinders themselves were in great shape for the hours.
Last edited: