Uneven engine operation.

[ngoma]

Originally Posted by Jimarilo

The air intake pipe that goes over the rocker cover has evidence of oil in it so suggests the engine is breathing heavy and at 165K I am thinking it is in need of a rebuild ......but is it worth it ??

Is that strong evidence for a rebuild? Where did you get this information?

What is your oil consumption?

What are the compression numbers?

With proper maintenance these engines can run strong for several thousand miles. Most early death examples are from botched maintenance practices (mainly insufficient tightening the crank pulley) causing catastrophic piston/valve interference.