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tmblackflag tmblackflag is offline
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Location: Los Angeles
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knocking/rattle from alt housing, new alt didnt fix, have video


i recently replaced my alternator due to a knocking/rattling sound coming from the housing. The sound did not go away. I took a few videos of the sound with and without the fan belt attached.

A little background on the knocking sound. When i took the alternator out over the weekend I found a decent sized crack in the alternator housing. I had it welded up by what i believe to be a competent magnesium welder. You can see pictures of the before cracks here. went to replace alternator and housing is cracked

Unfortunately i didnt take an after picture before i put it back in.

1st is just checking fan belt tension. Is this about right? 20120618_185902.mp4 - YouTube

2nd gets you a nice listen in on the rattling/knocking sound with the fan belt attached 20120618 190004 - YouTube

3rd is with the fan belt disconnected. Sound is lower but i can definitely still hear the rattle. 20120618 192112 - YouTube

any help diagnosing the sound is appreciated. thanks
1986 3.2 Meteor Metallic Grey
Old 06-19-2012, 08:47 AM
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