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First, I am NOT an expert! These are not direct injection motors so the injector and glow plug are not "in" the combustion chamber, they are in a small chamber off to the side which has a passage way to the cylinder. Something about this aids combustion apparently. I'm not super familiar with...

Yeah unfortunately I think I'll be tearing into the whole thing. My guess is this engine has been mistreated regularly. I'd imagine something happened and they replaced or reworked the head due to other issues and maybe didn't get the pre-chamber insert thing fully seated and/or didn't get...

Well looks like I’ve got problems. I did a leak down and got most air leakage through the intake on the middle cylinder and leakage through the exhaust through the rear (dead) cylinder. So I was thinking valve or valve seat or something that was head based. Yay. but then I took off the head and...

Thanks lugbolt, I ordered a leak down tester and just havn't had time this week to get to it this week. Want to clarify are you saying the pistons should protrude above the block surface at TDC? Also what's WSM? I do have the full Kubota service manual if that's what you mean. Thought for a...

That's a good idea! I'll heat up some plate over a torch and cook a little diesel and coolant and compare to the smell I'm getting!

Interesting, some of my searching revealed that unburnt diesel hitting the hot exhaust could cause a sweet smelling white smoke. But if there's a shot its not rings I'm more than happy to pursue that! I'll do the free rental cooling system tester this week and get back to you guys. Are head...

Would coolant in the cylinder prevent combustion and result in a dead cylinder?

Hey there. I’m new here but did do a bunch of searching and didn’t see the answer for my situation. Have a B6100 with the D650. Engine runs but doesn’t idle well and pours out white sweet smelling smoke. Pretty sure the rear cylinder is dead. When I crack the injector line there’s no change in...