This is from my post on Monday

Now I have pulled the timing cover - Everything is great

Pulled Oil Pan - No metal in oil, bottom end looks good I'm impressed with the Mass of the crank and rods

Only 2 possibilities left - Cylinder scored like I have read about happening to #6 right now I can not see any scoring on the cylinder walls but half the pistions are close bottom stroke and I cant see the cylinder walls (the engine is locked up will not turn over)

Or could something in the tranny have blown and done this? I really do not think so because when I pulled it to a stop the engine was still lugging forward.

Thought I might pull the head tomorrow night and check the cylinder walls and pistions before pulling engine.

If i do pull the engine and since it is locked up should I pull eng and tranny together?

 

Flex plate can come apart in such a way as to prevent the engine from turning.

Pull the tranny before you pull the engine, probably a lot easier.


phox

 

Good advice^^

It might NOT be the engine, but rather something connected to it.

justin

 

Since I cannot pull the torque converter will I be able to pull everything back enough to get the tranny out?

 

I've seen a siezed alternator on a gasser keep the engine from turning over, not sure if it can/could happen on a CTD. anychance that you blew the tip off an injector?blew a headgasket ? Maybe try pulling injectors to see if the engine will turn over (hydrostatic lock??)

 

If you can separate them I would, either way you will need to sooner or later. I have not pulled them together but just pulling the engine alone was a pain. Kinda odd if a piston came apart you should see something in the oil pan, no missing valves?

 

i snapped a ROD and the engine stopped and wouldnt do anything. and ive had a sticky alt but the super power cummins starter with larry b contacts pushed rite through thati also had a torque convertr bolt come out and stop my flex plate from moving got stuck at the bottom simple fix i would check out that trans mulder knows what hes talk'n about.

 

I've checked everything that turns on the front end.

No mixed fluids so head gasket I dont know?

Still possible a valve seat

Had the valve cover off first day everything intact up there.

Will drain and try to remove tranny tonight. Have alread removed dust cover not much to see up there just teeth and torque converter. Something odd though the access cover to remove the TC bolts is missing maybe the PO had problems and did not share.

Thanks for the replys keep the support comming

 

A valve seat might be stuck between a valve and the place where it's SUPPOSED to be.

This would keep a valve from closing and essentially lock up the engine.I doubt you'd see metal anywhere, either.

You COULD force the engine to turn over, then replace the bent pushrod and valve and..and..and..

This sucks-- let us know what happens.

JH

 

Justin, I don't believe he has valve seats. I believe the seats are machined in the head or at least that's how it was on my 99.

 

Did you try to turn the eng. over by hand ? Pry bar on flex plate , [ in both directions ] more often then not if the eng or trans seized , it can be freed up by using pry bar on flexplate / flywheel , and turning motor in the reverse direction on running .
Then is may be easier to find where its binding up & to take apart , find out 1st , it may be something not so bad , that if you find out after pulling eng , you'll kick yourself .

 

Good point. I think the valve inserts are fitted on HPCR trucks, right? I think that was a function of the higher EGTs they have with the emissions calibration.

 

Did not get to work on it tonight will try to use pry bar to rotate the engine tomorrow trying to find a tranny jack so I can get it backed out and check out the flex plate.

I'm confident around engines machinist by trade and worked at a rebuilder for 3 years when younger. but do not know much about trannies once I get it pulled back and supposing the flex plate is good what am I looking for other than debris in the fluid. or obvious damage to the TC

After the tranny my next step would be to pull the head.

 

Fluids dont need to mix to indicate a problem, a headgasket can blow next to a fire ring and coolant can be sucked into the cyl causing a hydrostatic lock, personally before I'd pull the tranny I'd be pulling injectors then try to bar the engine over, I have little cummins experience, but have twisted wrenches for 20yrs and have found it is much easier to do the simpler things first (also lots cheaper) I dont believe a bolt in the TC/flexplate comming loose would cause a "pop" the noise it would make would be more grinding and metalic sounding, especially if it was still tring to run when you were slowing down. The coolant being sucked in would also cause the engine to miss and knock (if it did not bend the rod)
Just my 2 cents take it for what its worth....2cents

 

If you have the oil pan off you can do it like this:

Remove rocker arms (to close all valves) - Check valve protrusion- all the same no valve problem -one lower stickting valve, one higher - broken valve

Remove con rod bearings and check whether pistons can be shoved up (should be moveable against compression) -If one or more can't be moved voila you know what it is.
With all pistons at TDC you can try to rotate the crankshaft- since it's almost alone (only camshaft ,IP and power steernig -vac pump on you will be able to see if it can be turned not at all (seized bearing somewhere) can be wiggled a gearing backlash width (indicates IP, vac pump or camshaft) or can be moved a good bit indicates some tranny trouble.

HTH

AlpineRAM