NX crankcase pressure

[finn1]

The valve is probably frozen, blocking passage of crankcase pressure back to the intake manifold. This is a relatively common problem on some engines, notably the GM four cylinder engines. Rear crankshaft seals often fail from the resulting high crankcase pressures.

The oil in the exhaust is likely what is referred to as slobbering, and is actually incomplete combustion, resulting in a tar like substance entering the exhaust system. It’s essentially partially cracked fuel. Note that all (to my knowledge) now recommend that you avoid idling, to the extent possible, in low ambient temperatures. Slobbering was a huge problem in on highway pickups and vocational trucks, as well as class 8 trucks, from all manufacturers. They all now caution against idling now.

 

[Kioti Dave]

The valve is probably frozen, blocking passage of crankcase pressure back to the intake manifold. This is a relatively common problem on some engines, notably the GM four cylinder engines. Rear crankshaft seals often fail from the resulting high crankcase pressures.

The oil in the exhaust is likely what is referred to as slobbering, and is actually incomplete combustion, resulting in a tar like substance entering the exhaust system. It’s essentially partially cracked fuel. Note that all (to my knowledge) now recommend that you avoid idling, to the extent possible, in low ambient temperatures. Slobbering was a huge problem in on highway pickups and vocational trucks, as well as class 8 trucks, from all manufacturers. They all now caution against idling now.

Thanks. This explains the failure of my rear seal last winter. Luckily, it was replaced on warranty..($5000 in labour to split the tractor) It doesn't look like it failed this time. Will have to keep a close eye on this as I don't want it to happen again. More ammo to heat the garage!!:thumbsup: