All Small Six Valve Seals and Compression

[gserafini]

As usual more fun things come up as you dive deeper! Seems like I may have some leaking seals. These plugs don’t have too many miles on them overall maybe a year old. Couple questions after seeing this and testing.
1. Anyone use the Viton 0.530 seals from Vintage Inlines and do they fit a stock on the 66 200?
2. Anything else I should look at closer while I have this valve cover off? Or anything you notice/ stand out from the photos?

Appreciate the experienced input from this group, as calling myself a weekend mechanic is even too generous ha!

 

[B RON CO]

Hi, of course you know that the valve stem seals have nothing to do with the compression. I am not sure, but I believe the top of the guides have to be machined to accept anything other than the stock umbrella seal. I would check the lash on # 3, if the adjustment is too tight, the valves may not be fully closed. If you measure poor or bouncing vacuum, loosen the adjustment. The plugs look a little rich, make sure the choke is fully open and held open with spring pressure when the engine is warm. Good luck