B6000 loud knocking

[todddrummey]

Hi All,

My old B6000 seems to have a major problem. It has always been hard to start and blows a lot of blue smoke until warmed up. I was running it yesterday. Seemed normal for about 1/2 hour. Then it started to "knock" very loudly. Oil pressure light began to flicker On/Off (normally off). I shut it down immediately. Looked for any obvious problems and checked oil which was a little low. I started it back up and limped into the barn.

I'm not sure where to start looking for the problem. Any suggestions?

 

[hodge]

Loud knocking can be an internal problem, but it can also be an injector. Injector knock can sound like a rod about to come through the block. So, before tearing into the engine, you might want to pull the injectors and get them tested. You could easily have a bad injector or two.

 

[Wild and Free]

Since the loud knock was in conjunction with the low oil pressure light I would drain the oil pan and look for signs of metal from a rod bearing failure or something along those lines, also take the oil filter off and cut it open and inspect for debris in there as well, sounds like a rod bearing failure.

 

[todddrummey]

Thanks for the suggestions. I'll start by inspecting the oil pan and filter. It needs a change anyways. I'll let you know how i make out.