I'm considering doing a valve clearance adjustment on a Suzuki M16A engine, and I have a couple questions:
>this would be the first time I do any mechanic work beyond the most basic of maintenance, how likely it is I will fuck up and damage the engine?
>the manual says you need a special tool to hold the valve seat down and take the shim out, is there a reason I can't just use a screwdriver or something to hold it down?