Ernest,

DO NOT set them hot, only cold. The spec I have specifies 0.10 - 0.20mm. I would set it in the 0.10-0.14 range and see if that helps with the noise. Any lower and you will risk burning the valve due to inadequate cooling.

You will need to juggle around the shims and hopefully you will only need to buy one or two.

The timing chain tensioners in the 16v engines are a known weak link. You want to make sure you have the upgraded tensioner. You can get a rough estimation of the stretch by setting the engine at top dead center and checking the alignment of the cams. If the chain/tensioner has not been upgraded and needs attention, you will usually hear a rattle at start up indicating the needed rapair. Don't wait. The longer you wait the more you risk damaging the chain guides or motor by possible chain slip.

Tinker