B2100 compression on 0 on one

[Dan26]

Hi
I’m new here , great site
I have 1998 b2100 , run great shut off and won’t start , did fuel solenoid, lift pump, checked glow plugs . Did compression test front cyl 0, #2 225psi #3 200, going to pull head anyone have any idea of what I could be

 

[GreensvilleJay]

my guess...
Either intake , exhaust or both valves aren't sealing anymore ?
Could be bent push rods, busted springs. Unlikely rings as zero should mean BIG air loss ?

 

[Dan26]

my guess...
Either intake , exhaust or both valves aren't sealing anymore ?
Could be bent push rods, busted springs. Unlikely rings as zero should mean BIG air loss ?

ok I’ll post what we find when we get the head off

 

[North Idaho Wolfman]

Hi
I’m new here , great site
I have 1998 b2100 , run great shut off and won’t start , did fuel solenoid, lift pump, checked glow plugs . Did compression test front cyl 0, #2 225psi #3 200, going to pull head anyone have any idea of what I could be

I think your compression tester is lying to you!
If it ran great like you said, 0 compression on one cylinder sounds very, very, very unlikely.
Or the tractor ran great 10 years ago then has sat around non running for 10+ years.
Also with your other 2 compression numbers it would have never started ever!

If this was a case of ran one day and wouldn't run the next, it's not a compression issue, that just doesn't pop up overnight.

Pulling the head is going to be of no value to you!

I'll bet you have a fuel delivery issue, like frozen water in the fuel system or a malfunctioning fuel solenoid.

 

[Dan26]

I have owner the tractor for 20 years , blow snow ran fine , shit off , tried to start next day , zero compression first cylinder , 225 and 200, new compression tester

 

[PoTreeBoy]

I have owner the tractor for 20 years , blow snow ran fine , shit off , tried to start next day , zero compression first cylinder , 225 and 200, new compression tester

Like Wolfman said, very unlikely it ran fine yesterday and today no compression on any cylinder. My first thought was compression release, but that model doesn't have it.

 

[North Idaho Wolfman]

I have owner the tractor for 20 years , blow snow ran fine , shit off , tried to start next day , zero compression first cylinder , 225 and 200, new compression tester

I'm telling you your test method or tester are 100% lying to you!
It's almost impossible that you have those numbers as it would have never ran in the first place.

You have a fuel delivery issue!
Do not tear into the engine as it will do you no good!
It's either electrical or fuel related.

Are you using a diesel compression tester?
And where did you test them?

 

[Dan26]

I'm telling you your test method or tester are 100% lying to you!
It's almost impossible that you have those numbers as it would have never ran in the first place.

You have a fuel delivery issue!
Do not tear into the engine as it will do you no good!
It's either electrical or fuel related.

Are you using a diesel compression tester?
And where did you test them?

Disappointed in the replies, I figure I might get some real advice , not people questioning what I’m asking about , ya buddy the tractor ran fine for 20 years , did an injector pump two years ago and a wheel bearing 5 years , I want be needing anymore of your advice

 

[lugbolt]

they won't run with much less than 300-320 psi. Maybe the testing method is incorrect?

Possibly sticking/stuck rings, but yes pulling the head will give you an idea where to start assuming your compression readings are accurate

 

[North Idaho Wolfman]

Disappointed in the replies, I figure I might get some real advice , not people questioning what I’m asking about , ya buddy the tractor ran fine for 20 years , did an injector pump two years ago and a wheel bearing 5 years , I want be needing anymore of your advice

@Dan26
Sorry you feel our knowledge is unuseful and advice unreal!
I can say I don't think your going to get any better advice anywhere!
The members on here are top of their game with Kubota's.

I have NEVER seen an engine that dropped compression on all three cylinders overnight.
It just doesn't happen... UNLESS....
Did you try and start it with ETHER / STARTING FLUID?
If you did that would 100% explain your compression numbers!
If you did then don't bother pulling the head, you'll need to rebuild the engine, because you've bent and or have broken parts!

Other option to your numbers would be you failed to add info, like you took it swimming or it overheated it massively the day before!

 

[PoTreeBoy]

Hi
I’m new here , great site
I have 1998 b2100 , run great shut off and won’t start , did fuel solenoid, lift pump, checked glow plugs . Did compression test front cyl 0, #2 225psi #3 200, going to pull head anyone have any idea of what I could be

Let us know what you find.

 

[hagrid]

I'm ready to see tasteful snaps of this engine's internals.

 

[sitric]

It always amazes me how people come in asking for advice, then getting short when the most knowledgeable, try to get them on the right track. They are fixated on what they think is the right track, and don't want any other tact to be offered. Without catastrophic causes, it makes no sense to have 0 compression in a previously working engine. I guess if nothing else, tear of the head and use it to learn what you have.

 

[GreensvilleJay]

It is a bit of a mystery, and I have to think he did several compression tests to CONFIRM #1 really, really is ZERO. We have a lot of guesses, like where tractor was sitting, GP time, etc. I KNOW Collingwood( central Ontario) can get real cold.
My gut says 'pull the head, see what's inside'

 

[InTheWoods]

Disappointed in the replies, I figure I might get some real advice ... I want be needing anymore of your advice

Dang - Can someone turn down the 'rudeness' setting on the auto engagement bots?

In the event you are human, and are very certain in your '0' reading, I'd suggest popping off the valve cover to see what the valves are doing. WAY less invasive than pulling the head.

 

[Lil Foot]

Feelings hurt?
Shame, I was looking to finding out what the problem was.....

 

[North Idaho Wolfman]

My final guess was the ether bunny visited that engine!

 

[D2Cat]

It always amazes me how people come in asking for advice, then getting short when the most knowledgeable, try to get them on the right track. They are fixated on what they think is the right track, and don't want any other tact to be offered. Without catastrophic causes, it makes no sense to have 0 compression in a previously working engine. I guess if nothing else, tear of the head and use it to learn what you have.

Reminds me of a new guy came on the forum and ask a specific question and the answers he received doesn't suit him. Says he'll go to his local dealer and get the real answer. The person who gave him the answer he didn't like was a tech at a dealer!!!!