Hey q-heads, I am wondering how long do you guys tighten your belts? My belts get loose every 4 months. Why is that? My A/C belt is the same. How tight am I suppose to tighten them? Enough that it doens't squeal? How many lbs is good? Is the Napa belts crappy? Any suggestions? Jason C 89 200t10v Redmond WA