212 Diesel grader, intermittent miss

Hi, I am not a diesel mechanic (that should be obvious if you have read any of my posts) but the problems you are describing could be an injection pump sticking intermittently, old fuel, or maybe even a little water in the fuel. My '69 Kaiser 2 1/2 ton 6X6 cargo truck had similar problems when I bought it but after running it and getting fresh fuel through it all those problems went away. I'm sure you will get some expert advice from REAL diesel guys on here too. Good Luck!

By the way, I once had a 212 grader too. Lot's of fun to play with but it soaked up too much room in my driveway here in the city. All of my neighbors with gravel driveways hated to see it go!

Hi, I am not a diesel mechanic (that should be obvious if you have read any of my posts) but the problems you are describing could be an injection pump sticking intermittently, old fuel, or maybe even a little water in the fuel. My '69 Kaiser 2 1/2 ton 6X6 cargo truck had similar problems when I bought it but after running it and getting fresh fuel through it all those problems went away. I'm sure you will get some expert advice from REAL diesel guys on here too. Good Luck!

By the way, I once had a 212 grader too. Lot's of fun to play with but it soaked up too much room in my driveway here in the city. All of my neighbors with gravel driveways hated to see it go!

I doubt this is what is causing your miss but I thought I would throw it out there-

I hauled home an old 5J D2 a few years ago (should be the same engine as your grader, D3400) that would intermittently miss on one cylinder, it would make a "pop" or "snap" sort of noise when it did it. Now this engine was very tired, it always had a pretty good flume of blue smoke rolling out the exhaust and a steady flow of air from the breather. I took the valve cover off and found both the inner and outer valve springs on the #2 cylinder exhaust valve had broken and coiled inside themselves far enough to let the valve hang open at all times, they couldn't pull it closed. The valve hung down just far enough to get tickled by the top of the piston as it came up, in fact there was a circle worn into the top of the piston where it had been hitting the valve. Once I got that valve problem fixed the miss went away.

Thanks guys, that gives me some ideas. OM, it would be foolish, but the guy had a video posted of it running and driving and they had been using it. So I figured it must have some oil pressure. I only ran it long enough to check that everything worked and to park it in front of my shop. It won't get run again until I hook up some gauges. Also need to get the pony running. I usually work alone, so can't count on tow starting.

OK, that does minimize the risk....wouldn't want to see it become a habit.

OM, No worries about that. I learned a long time ago from a veteran aircraft mechanic. Unknown engines get checked out completely before attempting to start. Always prime the oil system. Won't run her again until I do a thorough exploratory. Can't afford a catastrophic failure. lol

I see you are in to Jeeps. I'm not in to Jeep vehicles but I do have a "Hurricane" industrial engine pirated from an old FMC Speedsprayer (orchard sprayer) that I use for a utility cart. Where can I get a radiator & shroud (CJ3B type) without getting into the overpriced steel units from India?

I see you are in to Jeeps. I'm not in to Jeep vehicles but I do have a "Hurricane" industrial engine pirated from an old FMC Speedsprayer (orchard sprayer) that I use for a utility cart. Where can I get a radiator & shroud (CJ3B type) without getting into the overpriced steel units from India?

on ytmag.com, about $130 for rad 4 ford naa, & indust naa, mite try that, can use copper ells from plumbing to adapt?? Be blessed, nik rd4 4g