Sounds like you've got a collapsed lifter.If you can push with your 
finger on the bottom of the rocker arm and it goes in then replace the 
lifter(they are about $10 ).Two turns in after zero clearance is 
correct..COLD!

On Tue, 30 Jul 1996 Dmhoffmann@aol.com wrote:

> Having replaced a broken rocker arm stud on my 1980 2. litre I proceeded to
> adjust the valves. I tightened them to take out all play plus two full turns
> of the the adjustment screw, but this was too tight, I lost compression in
> cylinders. Then I redid it leaving the little play I felt in the Hydrolic
> tappets, but leaving no gap between the adjustment screw and the valve stem.
> Now they seem too loose.
>    1. Should I be feeling a little play in the tappets at all?
>     2. If so should I adjust it out?
>      3. Should I do the operation hot or cold?
>        
> Any help you could give would be most appreciated. Thanks,
> 
> 
> 
> 
> 
> 
> 
>                                                                          Doug
> Hoffmann
>