D600 starting issues
 

I’m working on trying to get my diesel Cub to start with no success. It acts like it wants to run for about 5 seconds and puffs white smoke and dies. Any suggestions in what to look for is greatly appreciated.

I have fuel to the injectors. Being white smoke, it would lead me to believe it is a head gasket issue, but there isn’t any water in the oil.

Are you sure your glow plugs are working and how long are you energizing them before you try to start it?

You may need to do a compression test. Have you adjusted the valves?

Have you done the diesel upgrades yet? They make a huge difference in starting them.

Gear reduction starter
https://www.onlycubcadets.net/forum/showthread.php?t=1

Glow plug upgrade
Get (3) NGK 2031 (Y-103V) and rewire them using a solenoid. Lots of posts on OCC doing that.

My D640 is to the point you basically need a hot day or boost pack. I bought it that way hoping it only needed a head, but I think the PO overheating it must have messed up the liners/pistons. It has a bunch of blow by.

What I'm getting at is it may be more than a simple head gasket, but a compression test will tell you a lot. A D600 calls for 337psi min, 10% variance max between cylinders.

Service manual: https://www.onlycubcadets.net/forum/...highlight=d640

What gage is needed to do the compression test and where do I get one?

Is your engine turning over pretty fast when starting?

I'm not sure this will work but I wouldn't expect much for $40.
https://www.amazon.com/YUAN-Diesel-C...xoCw9YQAvD_BwE

I wonder if your local auto parts store has a loner.

Info here.
http://www.engineprofessional.com/TB/TB030915-1.pdf