New to me TC29D cranks & won’t start

[the old grind]

Sorry this is so long. Are the GPs wired to be on continuously, or cycled several times before/between cranking? I've had to do the latter 3-4 times to start little red in 65 degree weather after sitting less than a week. Loose lash or swarf on valves or seats can impair proper compression.

A leak down test could clear that up if we haven't done that by now. With any leak (all three cyls? maybe) slow cranking makes thing worse. I'd hot wire the GPs and jump the battery from a running vehicle If that's not done already. (starter brushes worn? commutator dirty?)

Cam tuning/timing, porting, etc flows air the best at peak torque RPM, usually 1600 with our engines. Better flow leads to higher BMEP, so more heat to light the fuel. IMO 600 rpm(?) won't help our compression test or our chance of ignition. My CUTs run lumpy at 800 rpm and I 'idle' them at 1200-1400. (No load = min gph burned at any)

I'm stuck hoping that some things will shake loose after say minutes of run time, and I'm still not wanting to take more apart just yet. Also, last night on a long shot I wondered if a PO misread what the dirty injectors caused and removed the pump, then reinstalled it out of time to be sold. Any provenance with this one?

 

[Mud2Money]

That engine for sure has a gallop when cranking. The injectors spray awesome now. I was just thinking like mentioned above. The injection pump timing could be out.

 

[thepumpguysc]

The timing is set with shims UNDER the pumps mounting flange.. so changing is unlikely..
Have u just glossed over the 100 psi compression numbers.??

 

[K5lwq]

That engine sure sounds like it wants to fire off. It needs to turn over a little faster and I think it would. A good set of jumper cables from a running truck might do the trick.

There isn’t a decompression valve on this tractor is there? I’m pretty sure not but could be wrong.

 

[Molalla1]

Hopefully CJ reports in soon, I'm wondering.

 

[CalienteJohn]

Had to take a few frustrated days break to weed whack every spare minute here around property since fire season is upon us.

I’ve tried to do everything mentioned here

Check on bleed lines up to injectors one at a time and on starter it’s been cranked long and heavy I’m assuming at this point

Yes getting white gray and black smoke this last time and at the end of new video it definitely tried more then ever before to start.

No the pump has not obviously been taken off recently from what I see

I’ve adjusted throttle up and down when trying to start

I’ve cycled glow plugs up to four times before starting attempt and yes once or twice cycle in between starting attempts. Should I “hot wire them” a time while cranking?

The only thing mentioned I haven’t done is actually adjusting the valves I checked for gross miss adjustment in videos posted above was all…

Have it hooked in test video to a 1993 Jeep Cherokee with 160 amp alternator and a 800 cold cranking amp battery..

Still no joy..

 

[CalienteJohn]

Hot wired GPs to work while cranking. No improvement even while working throttle position slowly.

Searching for rings and gaskets at this point

One response from agkits.com they don’t carry anything

Waiting on a response from reliance and another company but it seems only places that carry these are over seas…

Any parts website recommendations? Local Dealer or no?

I think I’m leaning towards buying new rings and gaskets once I tear it apart to see nothing is significantly worn.

Do an in frame as some of you’ve said. Then it should at least run well enough to test everything else and maybe well enough to just work for us a few times a month as is.

Engine is a J843 if anyone can find something they would recommend specifically
Thank you again everyone

 

[Molalla1]

Searching for rings and gaskets

One response from agkits.com they don’t carry anything

Waiting on a response from reliance and another company but it seems only places that carry these are over seas…

Any parts website recommendations? Local Dealer or no?

I think I’m leaning towards buying new rings and gaskets once I tear it apart to see nothing is significantly worn.

Do an in frame as some of you’ve said. Then it should at least run well enough to test everything else and maybe well enough to just work for us a few times a month as is.

Engine is a J843 if anyone can find something they would recommend specifically
Thank you again everyone

CJ as you know it's a Shibura . . . you should be able to cross reference your engine parts?

 

[LouNY]

You used to be able to order rings by the diameter, width and thickness.
https://size.name/en/catalog/piston_ring_sets

 

[Mud2Money]

I see shibaru N843 rebuild kits all over. Not sure if it’s the same as the j843. Sounds like the N designation is just naturally aspirated. Many kits list the part numbers. You could get the part numbers and cross reference.