You aren't likely to see any leaks, and the bolts don't loosen as the mounts deteriorate. What happens is that the mounts collapse to a point and that can be measured.
http://www.peachparts.com/shopforum/showthread.php?t=4491&highlight=motor+mount+13mm
Steve
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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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