M936A1

[GILBERT2020]

Questions, just found a M936A1 near me that i don't need but cant turn down. Guy is willing to sell it to me for what I think is a steal of a price. I really am thinking about buying it just because its a hell of a deal. But are are these NHC250 a good motor? I have an M936A2 and its been a great motor so far, but it doesn't have much power from take off at a dead stop. Used me M936A2 to pull a fully loaded 18wheeler stuck this past month and she really didn't like it, also had some major storms and pulled a large tree off the road and she really wasn't a fan of it in low and 1st gear. Maybe hoping the NHC-250 could offer more low end power? I mean the M936A2 is great once you get the tires rolling, but its getting those tires moving that is the problem for me. Thanks for any input guys.

 

[simp5782]

If the motor has super low miles/hrs since it's rebuild I would be wary. They throw rods from the rebuild process. If it has hours on it then it would be fine.

The NHC250 was a 70s workhorse. You don't hear of many issues in the 809 series trucks. Mostly just the 939 RRAD rebuilds. I put 250k on one in a 923.

 

[GILBERT2020]

Thanks for the info Wes, same guy has a 350 Cummins sitting in a crate, know much about them?

 

[eric67camino]

If the motor has super low miles/hrs since it's rebuild I would be wary. They throw rods from the rebuild process. If it has hours on it then it would be fine.

The NHC250 was a 70s workhorse. You don't hear of many issues in the 809 series trucks. Mostly just the 939 RRAD rebuilds. I put 250k on one in a 923.

What do you suppose was causing them to fail after rebuild? One would think a refresh would prevent such things.

 

[simp5782]

What do you suppose was causing them to fail after rebuild? One would think a refresh would prevent such things.

The guy in the rebuild department was leaving snap rings out of the wrist pins, not aligning the piston rings.

I don't think they load test the engines properly etc after rebuild anyway

 

[eric67camino]

The guy in the rebuild department was leaving snap rings out of the wrist pins, not aligning the piston rings.

I don't think they load test the engines properly etc after rebuild anyway

Well, I guess that would do it. Thank you.