Valve Adj 300D

[rmmagow]

Bought my first diesel in June, an 83 300D turbo w/169000. Ugly interior but runs well. I want to adjust the valves before winter and need to know if the fancy Hazmet (Hazmat?) tools are required or can I do the job with a set or normal Craftsman's. I've done this job on my 58 220S gasser and on an even older 180 I had many years ago so I'm not to concerned about the basics. When tightening the lock nut should I really put some "tight" to it, i.e. lognut tight or valve cover tight or in the middle.

Thanks Much.