adjuster

I've browsed various forums and threads and haven't been able to solve this. First of all is the adjustment. At the last MOT I believe the parking brake was flagged as having no effect and I presume the garage adjusted it. After that it felt like the brakes were binding a little, perhaps it was...

A quick question, Thers is a lot of mentions around forums of worn cam adjusters causing chain slip on M271`s. ( although to be fair it is the crap chain ) I`ve got the top half of my engine stripped at present, what should I look for regarding the cams? I`ve not stripped the cam sprockets...