No run B8200

[ronztractor]

I will try and make this long story as short and accurate as possible. A friend asked me to complete a engine rebuild that someone else started but couldn’t complete.
They had completed the lower half. Pistons, rings, bearings, with the timing gears installed and timing cover on. I installed the head (brand new with valves) valve train, injection pump and injectors (which I had professionally rebuilt) I adjusted the valves to specs brought number one up to TDC with the 1 TC indicator on the flywheel centered, bled the fuel system.
I have been unable to get the engine to start it will make smoke but will not attempt to run, I checked the fuel timing with the original shims it seemed off so I removed one closer but still no run.
I checked the compression and they are all around 225psi
Can the engine timing be off to cause this even though I could set the valve lash?

 

[007kubotaguy]

Compression is to low.

 

[85Hokie]

my first thought was compression also.

225 is way out of spec - 325 ish is low limit.

So - either the mechanical timing is off or the valves are too tight. What spec you set valves to?

 

[North Idaho Wolfman]

Yes the timing being wrong can effect that, a bad rebuild can effect it too.
Bad injectors / wrong injectors or bad seals on the injectors can cause it too, also bad/ wrong glow plugs.

 

[jaxs]

I will try and make this long story as short and accurate as possible. A friend asked me to complete a engine rebuild that someone else started but couldn’t complete.
They had completed the lower half. Pistons, rings, bearings, with the timing gears installed and timing cover on. I installed the head (brand new with valves) valve train, injection pump and injectors (which I had professionally rebuilt) I adjusted the valves to specs brought number one up to TDC with the 1 TC indicator on the flywheel centered, bled the fuel system.
I have been unable to get the engine to start it will make smoke but will not attempt to run, I checked the fuel timing with the original shims it seemed off so I removed one closer but still no run.
I checked the compression and they are all around 225psi
Can the engine timing be off to cause this even though I could set the valve lash?

Don't beat yourself up over this. What you inherited is known as "a basket case" and less than one in 1k mechanics will touch one for any price. Since you say it's a friend, I don't blame you for trying it but I hope your friend doesn't blame you if it requires partial dismantling and starting over.

 

[ronztractor]

Thanks for the replies, yes I know the compression is to low, I have the valves adjusted to 006 according to specs. I guess I’m wondering if I can bring #1 to TDC and the #1tc indicator on the flywheel is centered in the window can the valve timing still be off.
Maybe I should do a leak down test

 

[jaxs]

Thanks for the replies, yes I know the compression is to low, I have the valves adjusted to 006 according to specs. I guess I’m wondering if I can bring #1 to TDC and the #1tc indicator on the flywheel is centered in the window can the valve timing still be off.
Maybe I should do a leak down test

The brief answer to that question is yes but I'm not saying that's your problem. The piston AND flywheel of four stroke engines come to tdc TWICE on ever cycle, once on compression then again on exhaust. Pay attention to marks on cam gear and injection gear.

 

[ronztractor]

The brief answer to that question is yes but I'm not saying that's your problem. The piston AND flywheel of four stroke engines come to tdc TWICE on ever cycle, once on compression then again on exhaust. Pay attention to marks on cam gear and injection gear.

 

[North Idaho Wolfman]

You have the valves set on the tight side.
.059 to.075 is the standard for that motor.
I personally would back them off to .07 maximum.

You should not remove any shims under the injection pump, that is only making your problems worse.

Are the glow plugs working?
It will NOT even start to fire off without them being preheated and then also getting heated while cranking.

You will only know if the timing is set wrong if you pull the front gear case cover and check all the marks.
One word of warning, when you pull the gear case, the marks right off the bat look wrong as they only align every 288 revolutions.
So stop and ask how to check them exactly, if you do that.

 

[ronztractor]

So I pulled off the front timing cover and your right it would take forever to recheck the settings.
So I decided to start from the beginning and reset the marks.
So with the piston at TDC with the 1TC marker centered in the window the piston is on compression or exhaust which is determined by the camshaft position
With all the dots on the gears aligned properly would that mean the intake valve is timed to open with the injection pump firing #1 injector in this positioning?