spun bearing, what is this pin piece???

[duratothemax]

My failure was due to having too many bowls of stupid for breakfast!
Lets just say, it had plenty of ether to start 25 Dmaxs.

Your bearing failure could have dropped the oil pressure not allowing it to get to the valves fast enough upon starting. The other pieces could be pieces of the ears broken off of a piston or two.
Keep in mind I am a diesel dummy, my opinion is merely a guess.

Be glad you didn't find this treasure chest in your oil pan!
My pot o' gold!!

duramax's dont have hydraulic lifters...

 

[Rudely]

I know that. Are you saying the valves and lifters are always in oil and can never run dry?
Doesn't the oil still have to come from the pan to the top of the motor? Would a spun bearing still cause low oil pressure with solid lifters in a Dmax?
Seems to me gravity pulls the oil back to the pan when not running, then it must be pumped back to the top when started.

I am no doubt a diesel retard, please explain your theory in more than one sentence so this diesel dummy can understand.

I read my post good, it sounds to me I am being sarcastic. I am not.

I really need to understand, it just seems to me the Dmax motor isn't much different than a bbc motor as far as rotating assemblies and solid lifters are concerned. I know for an absolute fact that bearing failure can lead directly to valve failure, solid or hydraulic. Yes, I blew up one (ok a few) of those too.:roflmao::roflmao:

duramax's dont have hydraulic lifters...

 

[Rudely]

It was a damn cold morning, freezing my nards off. Shot the either to it through the cold air intake, oh about half a can or so!!! I have been told before I can be quite impatient..........cost me in a big way that time.
Where the hell was I when you were preaching?

Guess which lines in my signature are directly related to my
"stupid cereal"!!:rofl:

^^^ Rudley that's quote material there! :rofl::hug: That's a hard lesson... I have been preaching caution with starting fluid ever since I bent the push rods on a 3406 Cat

 

[mainer]

Wow bad news....

Looks like the lash was set way too tight, valve contacted the piston, broke the valve stems, broken pieces clogged oil return from the top end and the lack of oil along with contaminated oil caused a bearing issue.

just a thought.

i wouldnt think it would have run long enough with 2 broken valves to damage a bearing (the oil pump didnt look too bad, i've seen much worse)

and i would also think it would have shown damage on more than just 1 bearing. idk???

 

[JoshH]

duramax's dont have hydraulic lifters...

I didn't see any mention of hydraulic lifters. I think he was saying everything in the top end got dry. You do understand that there is pressurized oil that gets sent up to the valve train, don't you?

 

[duratothemax]

I didn't see any mention of hydraulic lifters. I think he was saying everything in the top end got dry. You do understand that there is pressurized oil that gets sent up to the valve train, don't you?

Yes, of course....

Getting no pressurized oil to the top end of a dmax isnt gonna make a valve stem snap off...IMO. The valve stems dont even have any contact with pressurized oil....they just touch those little bridge things.

 

[JoshH]

Yes, of course....

Getting no pressurized oil to the top end of a dmax isnt gonna make a valve stem snap off...IMO. The valve stems dont even have any contact with pressurized oil....they just touch those little bridge things.

I didn't say I agreed with that being the cause of the failure. I was just saying I didn't think he was saying it was a hydraulic lifter problem. That said, if the valve train were completely dry, I wouldn't say it was impossible that there might be a slight chance there could be enough friction between the rocker tip and the bridge that it could put enough perpendicular force on the tips of the valve to break it off. I would say it is extremely unlikely. With the hardness and smoothness of the rocker tips and the little button inserts in the bridges, I would imagine that, even with no lubrication, the coefficient of friction between those two parts would be very low. You would probably have a better chance of winning the lottery two weeks in a row.

 

[mainer]

I didn't say I agreed with that being the cause of the failure. I was just saying I didn't think he was saying it was a hydraulic lifter problem. That said, if the valve train were completely dry, I wouldn't say it was impossible that there might be a slight chance there could be enough friction between the rocker tip and the bridge that it could put enough perpendicular force on the tips of the valve to break it off. I would say it is extremely unlikely. With the hardness and smoothness of the rocker tips and the little button inserts in the bridges, I would imagine that, even with no lubrication, the coefficient of friction between those two parts would be very low. You would probably have a better chance of winning the lottery two weeks in a row.

thats my thought as well... so how the hell do you break the off?

 

[Fingers]

Popping the top off the stems is almost always from over reving.