trukfan
Well-Known Member
- Joined
- Jul 26, 2009
- Messages
- 45
- Location
- S.E. Wisconsin
- Occupation
- Maintenance Tech for a machine shop
Hi all. As the title states, I've got an oil seepage issue on an engine. I say seepage because it's not leak per se, but I still have oil where I shouldn't. Engine in question is a turbo'd 6 cylinder 401ci in a Ford 9700 ag tractor, the same I had oil cooler issues with in another post.
While running, I have oil seeping out of where the turbo bolts onto the exhaust manifold. I say seeping because it takes 20 minutes for it to form a trickle and it is barely visible until then. I also have the same seepage where the boot from the down pipe meets the intake manifold. Engine has less than 3k hours since a complete rebuild with new turbo, and I am unsure how long this issue has existed.
I had originally thought leaky oring or seal in the turbo, but I noticed yesterday my tractor with a non turbo'd 401 seems to be doing the same thing. Similar hours on rebuild, but I had to tear it down completely 2 years ago for a coolant leak in a cylinder wall. Both tractors have a removable crankcase vent tube in the valve cover, but nothing resembling a PVC valve. Does this sound like crankcase vent issue, or something else?
On the turbo'd tractor, it will puff blue smoke while running, but not constantly which I assume is from oil being forced through the intake by the turbo. On my other tractor, it only smokes a little at start up. Once I'm in the throttle, she burns clean unless I'm really working her.
The only other thing I've been told to check is the oil return line from the turbo, since my other tractor isn't turbocharged, that may or may not solve anything. Thanks in advance.
While running, I have oil seeping out of where the turbo bolts onto the exhaust manifold. I say seeping because it takes 20 minutes for it to form a trickle and it is barely visible until then. I also have the same seepage where the boot from the down pipe meets the intake manifold. Engine has less than 3k hours since a complete rebuild with new turbo, and I am unsure how long this issue has existed.
I had originally thought leaky oring or seal in the turbo, but I noticed yesterday my tractor with a non turbo'd 401 seems to be doing the same thing. Similar hours on rebuild, but I had to tear it down completely 2 years ago for a coolant leak in a cylinder wall. Both tractors have a removable crankcase vent tube in the valve cover, but nothing resembling a PVC valve. Does this sound like crankcase vent issue, or something else?
On the turbo'd tractor, it will puff blue smoke while running, but not constantly which I assume is from oil being forced through the intake by the turbo. On my other tractor, it only smokes a little at start up. Once I'm in the throttle, she burns clean unless I'm really working her.
The only other thing I've been told to check is the oil return line from the turbo, since my other tractor isn't turbocharged, that may or may not solve anything. Thanks in advance.