[shovelhead76]

Need help diagnosing air in the oil.
1976 shovel head fresh top end.
runs great but the air/oil expansion pushes oil out of the filler hole.
running stock pump with performance cooler.

 

[Big Al]

Neat! I have trouble getting my expresso machine to do that!

Hope you figure it out!

Cheers

 

[donisonov]

so much pressure that there are bubbles in the oil and it gets forced out the filler is usually a result of a clogged breather hose. I'm assuming if its a 76 your breather runs directly out of the cases to the ground. You may have some sort of paper filter on the end of the hose. if so, throw it away and replace. This should fix your problem.

Moose Jaw, Canada.