A painfully easy question for anyone that knows about the basics of engines (so not me then)! I need to change a belt on the 3rd gen Trans Am, which is for the smog pump, it's a v belt so goes straight from pump to crank. I have loosened the bolt that attaches the pump to the bracket but can't move the pump (there is no belt on there at the moment). It's about half way through the adjustment groove, could go a few inches left or right. When i try sliding the pump to adjust it, nothing happens, just rocks the car from side to side. Bolt is completely loose, am i missing something? tried searching 3rd gen.org but all the search results are about people switching from v belt to serpentine
Couple of scares on the way though... When i started the car in the morning, a big plume of white and blue smoke came out the exhaust 
Hoping it was because it had been sat for a couple of weeks. Then whilst on the road to the MOT place, heard a big clunk and metallic sound. Pulled over... i had left the spanner on the bottom bolt of the air pump and it came off mid flight 
Luckily it was only at low speed, so at that point there were 2 spanners in the road 
