Cat 320bl engine oil leaking??????

[will]

On top of the valve cover there is a breather tube that is leaking some oil. What could the cause possibly be? Thanks.

 

[willie59]

Do you mean that breather pipe is leaking oil at connection to valve cover, or the breather pipe is leaking a considerable amount of oil out of the end of the pipe?

 

[will]

At the connection to the valve cover. Thanks

 

[willie59]

If I remember the BL correctly, that crankcase vent gizmo simple fits into a hole in the casting of the valve cover, it's sealed with an o-ring. Over time, engine heat causes that o-ring to get hard as a brick and it starts seeping oil. Replace the o-ring seal and it should fix your leakage.

 

[will]

Thanks i will replace it and see what happens.

 

[dsichewski]

If I remember the BL correctly, that crankcase vent gizmo simple fits into a hole in the casting of the valve cover, it's sealed with an o-ring. Over time, engine heat causes that o-ring to get hard as a brick and it starts seeping oil. Replace the o-ring seal and it should fix your leakage.

Bingo....Atco you are completly correct!

 

[willie59]

Bingo....Atco you are completly correct!

LoL...well, we'll see.