Corvair Forum

One thought going back to where the issues started...you said you tightened the rockers down until they wouldn't move (zero lash) then 1/2 turn more. If you set the number 1 cylinder at top dead center then rotate to zero etc.... and used that cold procedure (there is a good old video on YouTube ...

I experienced exactly what you describe on my 65 Monza. It had been running well then didn't want to stay running at idle so I would have to review it at stop lights. Took air cleaner off and it ran fine. Then I saw the large blow by out the vent tube and concluded with the air cleaner on the blow ...