Gti 130 oil in spark plug tubes

[Mekanix]

2017 gti 130 with oil in plug tubes.
Ends up covering spark plugs and causing a no fire condition.
Replaced the 3 tubes, replaced the valve cover gasket and screws thinking not enough clamping force was the issue.

Still leaks.

Any ideas?

So far it's only been suggested that maybe too much blow by or the tops valve clogged.

 

[Sportster-2001-951C-Stock]

Crankcase breathing issue, drainback from head to crankcase clogged or restricted, too much blow-by, are the three things that come to mind.

But if the gasket is sealing, there would be no leak thus no oil, correct?

 

[Mekanix]

A new development is that it leaked just while sitting, so it looks like the seal has failed completely. But after cleaning and running it there was very little oil in the tubes so I'm not sure if maybe the oil is just not pooling as much while it's running or if maybe there is something else.

 

[Sportster-2001-951C-Stock]

Avoid using anti-gravity oil?

 

[Mekanix]

You mean 80w90 eh

 

[Sportster-2001-951C-Stock]

I've never seen 90w run uphill! Warped cover?

 

[Mekanix]

Possibly. But the oil is coming from the bottom up. I think it's just expansion and heat. The tribes fit in snugly though.
Thinking of making small oring gaskets on the bottom to see what happens.

 

[Sportster-2001-951C-Stock]

Oil in that location id handy for fogging, just remove plug and let oil flow in.

When searching for crankcase leaks, I pressurize the crankcase slightly by a few psi, through the breather.