2000 john deere 3029d engine blowing oil and exhaust out valve cover tube

talltailkennel · Jul 4, 2016

I have a tractor that is a 2000 with a john deere 3029d engine in it. I was hauling hay and suddenly lost power and started having a lot of really black exhaust. Thought it might be an injector so I changed all 3 of them as well as the oil/filter, and fuel filter. It has better power now and not as much smoke but it is blowing exhaust out the hose that comes off the valve cover. And oil is coming out the dip stick like it is under pressure. Any ideas?

topbuilder · Jul 4, 2016

Head gasket, valve seals, broken rings, jumped time, bent pushrod. If none of those fixes are in your wheel house, better have some take a look.

Zebrafive · Jul 5, 2016

I was thinking stuck rings or broken ring(s) creating a LOT of blowby

Jerry/MT · Jul 6, 2016

talltailkennel said:
I have a tractor that is a 2000 with a john deere 3029d engine in it. I was hauling hay and suddenly lost power and started having a lot of really black exhaust. Thought it might be an injector so I changed all 3 of them as well as the oil/filter, and fuel filter. It has better power now and not as much smoke but it is blowing exhaust out the hose that comes off the valve cover. And oil is coming out the dip stick like it is under pressure. Any ideas?

Excessive blow by is generally caused by worn or broken rings, burned hole in piston crown, etc that alls combustion gases to pressurizes the oil pan and causes oil to blow out.