Strange problem with my Case 895 (engine D268 spitting oil)

[Beekeeper21]

Hello I have a problem with my own tractor Case 895 (engine D268) The tractor was not using in all winter, now I start it and when he get 40 degrees Celsius it started spitting oil from the bleeding the crankcase. Bleeding the crankcase at the top near the oil filler cap. The 10W40 oil was changed last year in July, the tractor worked until September, everything was OK. Oil quantity between minimum and maximum in the middle. Oil pressure 3.4-3.6 Bar at 40 degrees in the cooling system. I changed the heads because I thought the head gasket was damaged, but it didn't help. I took my head to the workshop, they checked for cracks and replaced the valves. They checked the plane, replaced the brass bases of the injectors. They said that everything was OK with the head. I put in my regenerated head and still have the same problem (40 degrees coolant and oil starts pouring out of the pipe (full cross-section). No symptoms of a damaged gasket (no water in the oil, no oil in the water cooler). The engine has no work on the piston liners. , it starts from one revolution of the starter. This is what happened after the winter when the tractor was parked... I also replaced the oil filter, the one from July, with a completely new one... The coolant didn't freeze. It's minus 35 degrees and we had a maximum of 25 degrees.I have no idea what could be damaged? I'm writing here because there are a lot of tractors of this type in the UK and it may someone had such a problem. I'm counting on You.

 

[Bobby Spray]

I have a similar tractor (795) and have rebuilt the engine but what does this mean?
"it started spitting oil from the bleeding the crankcase."

Whe is the oil leaking from?

 

[Beekeeper21]

Yes, the oil is pouring out of the crankcase breather (from this pipe near the plug), but when the engine reaches 40 degrees Celsius, everything is normal before that, there is no blowing from this pipe

 

[spin cycle]

is there oil/smoke from the breather?

 

[Beekeeper21]

Before 40degrees (coolant ) no smoke from breather ,when engine get 40 C oil start pouring out from breather. I will add that the engine did not burn oil (it did not eat it) and was in mint condition

 

[Bobby Spray]

From memory the breather is on the top rocker cover? Have you taken the rocker cover off to see what's going on there? Seems odd that when the water temp gets to 40c and presumably water thermostat opens that the oil pressure increases and comes out the breather. Unless oil and water are mixing.

 

[Beekeeper21]

*From memory the breather is on the top rocker cover?*-- You are right. Water and oil isn't mixing.Tomorrow I will install the second valve deflector shaft..Maybe there is too much clearance on it and too much oil is poured into the cover of valves

 

[ford 7810]

Maybe just needs some hard work if it’s Stood a long time ,piston rings need freeing up

 

[Zebbedee]

These engines can glaze the bores badly if not worked hard giving the symptoms you describe, new pistons and liners will cure it or possibly some very high load work for a few days will certainly help, eg a forage harvester or slurry pumping

 

[JockCroft]

These engines can glaze the bores badly if not worked hard giving the symptoms you describe, new pistons and liners will cure it or possibly some very high load work for a few days will certainly help, eg a forage harvester or slurry pumping

Is it not likely heavy work now with high working temperature will go for the liner seals?
Remember two or three on heavy pumping/agitating duties ended up with coolant in the sump. One on a drier got a porous liner.

 

[Wisconsonian]

Inspect the baffle in the rocker cover. The baffle has to separate the oil from the gases leaving the breather tube.

Double check the oil level in the crankcase, is it possible the dipstick has been swapped? or the tube has come loose changing the level on the dipstick? or the clean oil is not showing up clearly on the dipstick?

"oil starts pouring out of the pipe (full cross-section)" Does this mean that a full stream of oil is coming out? That would be much different than oil splattering out. Oil splattering out is not all that unusual, not good, but not rare either.

 

[Beekeeper21]

Does this mean that a full stream of oil is coming out? ---yes . Problem solved .... Thanx for All

 

[agrimax]

How was the problem solved?

 

[Beekeeper21]

Damaged shaft on which the valve cams are mounted. Too much oil was pumped onto the valves. Now, after the repair, on a cold engine I have 5.5 Bar oil pressure, when the engine reaches 45 degrees Celsius I have 4.4 Bar.