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Alternator vibration?

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Yardie
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    Posted: 18 Apr 19 at 12:45
There is a metal bush thats missing from the alternator bracket where the top bolt goes through to hold the alt in. Thats the one thats a pain to get to.
With the engine on there seems to be a lot of vibration at the alternator. Not sure if it's to do with the missing bush or otherwise.I placed my hand on the bottom to feel it and it seems to be much greater than the parts around it. It's quite severe so you wouldn't want to hold onto it for long (not that you'd need to). Is that normal???



Edited by Monster LT - 18 Apr 19 at 12:58
LT45-TD-ACL-intercooler-4x4-1993
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyT Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 19 at 14:11
I'd say no, in the long run it's gotta knacker the bearings.
LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monster LT Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 19 at 22:55
Precisely my fear, but for the amount of vibration it may end up being in the short run. So I've got to find the cause of the excess vibration... hence thinking about that missing bush although I can't see it making all that big a difference. Maybe the belts overtight or somehow the bolts are loose. I'll need to get hold of some bush, give it all a once over and loosen the belt.Wink


Edited by Monster LT - 19 Apr 19 at 11:00
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyT Quote  Post ReplyReply Direct Link To This Post Posted: 19 Apr 19 at 10:19
Take the belt off completely and check vibration, dunno what else it would be atm but it would rule out the alternator.
LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monster LT Quote  Post ReplyReply Direct Link To This Post Posted: 19 Apr 19 at 12:45
So I checked the mounting bolts again and took the belt off as you suggested Andy. There was no major vibration with belt off, so yes it was due to the alternator. I then loosened the the adjusting bracket replaced belt, adjusted and tightened all three bolts (adjusting bracket to block, adjusting bracket to alt and the top bolt of the alt with the missing bush). Started up, revd and rechecked for vibration and it's back to normal again with the added bonus of no noise. Very happy and hope that noise doesn't return!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyT Quote  Post ReplyReply Direct Link To This Post Posted: 19 Apr 19 at 13:13
Great newsBig smile, if it does re-occur I'd change the lock nuts and locking washers but that's all.
LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k

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