1997 D905 in a Miller welder

[mikegust]

Hello, I replaced a cracked head on an unknown condition machine.
The compression tester that I have borrowed reads 100psi in all 3 glow plug holes.
It will not start, although vapor is huffing out the tailpipe while turning over.
The valve lash is set at .008".
The glow plugs show continuity to ground, and they receive 12v when the switch is activated.
I find it hard to believe that if the was a problem with cylinder walls or piston rings that all 3 holes would have the same compression reading.
I have not opened the front to check timing gears or alignment.
I am trying to get away cheap to start with because I dont even know if the welder part works.

Any ideas out there of what I might be missing ?

It also has a new Kubota, standard thickness head gasket as per the engines serial #

Thanks in advance

 

[North Idaho Wolfman]

Did you use a compression tester for diesel engines?
Because an standard tester will not work.

If you did use the right tester then something is seriously wrong with that engine, maybe stuck rings?

It's near to impossible for the timing gears to ever be wrong unless the engine was disassembled.

 

[mikegust]

Did you use a compression tester for diesel engines?
Because an standard tester will not work.

If you did use the right tester then something is seriously wrong with that engine, maybe stuck rings?

It's near to impossible for the timing gears to ever be wrong unless the engine was disassembled.

Thanks for that.
Yes it is a diesel engine compression tester.

The engine was stuck at first from sitting.
Once I got it freed up, none of the transmission fluid and diesel that I had in the open cylinders ever drained off at all even after a week or two.


I'm glad to hear that the timing gears don't need to be looked at, but I feel like your opinion would be to dis assemble to check rings either way, or is there a way to just keep working the engine and hope they free up ?

Thanks

 

[North Idaho Wolfman]

On these little engines when the rings get stuck they rarely unstick without some help.
You would have to pull the head again and pull the pain and pop the pistons out and free the rings up.

Where did you get the head?
Did the heads look identical?
If it's the wrong head that would explain why you got exact wrong compression numbers.
Did you check for compression leaks on the injectors?

 

[mikegust]

On these little engines when the rings get stuck they rarely unstick without some help.
You would have to pull the head again and pull the pain and pop the pistons out and free the rings up.

Where did you get the head?
Did the heads look identical?
If it's the wrong head that would explain why you got exact wrong compression numbers.
Did you check for compression leaks on the injectors?

Makes sense to hear it.

The head came from China, brand new and identical, although the valves were not cut properly so it has build to an engine builder to seat the valves.

There were small leakage at 2 injectors which has been fixed.

This morning I turned it over with my thumb over the breather port on the valve cover......it builds quite a bit of pressure fairly quickly‍

 

[North Idaho Wolfman]

Yea excessive blow by is really pointing to stuck rings.

 

[mikegust]

Thanks North Idaho Wolfman.