Re: Valve/Rocker arm setting

Harley Dixon

Thanks. That what what I was going to do (using the Lycoming Service Instruction #1068A), but I was hoping that there would be a bit shorter and simpler way!  I have nothing but time now anyway, so no problem!


On 6/30/2020 1:04 PM, longezn911gg via wrote:
You want to pre-load #2 and #4 then start with #1 at TDC set it to .008” +/-.001 then continue in the firing order. After you have completed it go around once more re-checking with the feeler gauge. There is a you tube video on the 0-290, which is the same. Always refer to the lycoming manual.

Good luck 

Craig Gearhart

On Jun 30, 2020, at 12:09 PM, Harley Dixon <harley@...> wrote:

What's the accepted way to adjust the valve lash?  Lycoming instructions say to set the cylinder at TDC, then check or adjust the rocker arm/push rod gap (solid's an O-235 C) but wouldn't it be easier to rotate the prop until the intake valve is approaching fully open then set the exhaust valve rocker arm gap, and vice versa for the exhaust valve settings? That's the way I used to do it for my cars before hydraulic lifters. Looking around the internet, I don't see any mention of doing it this way on solid lifter aircraft engines.

Long EZ N28EZ


Join to automatically receive all group messages.