Ford Focus 1.8 Ghia '99 V
A little while ago a large section of the aluminium heat shield above my exhaust came loose. Being in a situation where I needed to keep going and without tools, I crawled under and ripped the whole thing off. Now (a few months later) there is a suspiciously aluminium like rattle coming from under the car at low rev ranges, which I suspect to be the remaining heat shield around the bolts which have probably worked a bit loose.
My question: is it safe to remove all the heat shield bolts, or do they serve to hold anything important on?