n14 inj rocker arm moving to fast

[bwake]

(09-08-2021 )hct5 Wrote:  found #6 connecting rod bearing has spun and broken apart. i have not replaced a crank on a n14 before is it possible to do with the engine still in the truck or dose it need to be pulled ?

This is going to be a complete engine removal and tear down. The spun rod bearing isn't going to cause the injector rocker to cam over twice as fast as the others so a more in depth evaluation is going to be necessary. Are the intake and exhaust rockers also actuating twice as fast as well? If so, I've seen a cam that was broken towards the rear and would "catch" itself on the spinning cam and work in an abnormal fashion. With the #6 rod bearing spun, my guess is it starved the rear portion of the cam of oil and caused some issues up there.