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Old 02-21-2013, 05:28 PM
thatsmrmastercraft's Avatar
thatsmrmastercraft thatsmrmastercraft is offline
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Join Date: Sep 2008
Boat: 1977 Stars & Stripes
Location: St. Paul, MN
Posts: 15,030
It is possible for the timing chain to have so much slop that it hits the cover. Usually if it is excessively loose you will have other problems such as hard starting from little or no cranking vacuum and lack of performance. Should be able to find the source of the sound using a long screwdriver or, better yet, a mechanics stethoscope.

Note: if your wife has a stethoscope from her occupation she will not see the crossover use as reasonable.
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