Neil, loosen the 2 valve adjusters for #3 by 1/2 turn each. Then check
compression again. Someone may have messed up the adjustment and if a
little too tight compression can read low.

Mark

neil N wrote:

>................
> Used w/o adaptor (engine cold) I got:
>
> 150 150 150 Then......
>
> 50 on # 3. :((
>
> The plug on this cylinder also looked fouled when I first looked into
> this engine. #3 also has what look like collapsible push rod tubes.
> There is one of these on # 4 too.
>
> #3 may be Hinky.
>
> When testing other cylinders, I hear a "bluuup bluuup" sound. With
> tester installed on #3, no "bluuup bluuup" sound.
>
> Maybe lifters are soft from all that gas? I couldn't feel any obvious
> play at rockers. (valves closed)
>
> Also hinky; oil pressure switch not connected. And I can't find the
> wire/connector. (??)
>
> Time to start yanking sh*t off.
>
> --
> Neil Nicholson. 1981 Air Cooled Westfalia -
> "Jaco"  (Bustorius)
>
> http://web.mac.com/tubaneil
>