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Jun 14th, 2026
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Joined: Mar 2013
Posts: 414 Likes: 6
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OP
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Joined: Mar 2013
Posts: 414 Likes: 6 |
Hello gents... So I have noticed a worsening rattle at low RPM (2000-2500) that seems to emanate from behind the rear passenger seat (LHD car). It occurs in both forward and reverse gears The rattle disappears when the clutch is depressed, so I suspect something in the drive train... It's also gone when I'm over 3000 RPM... It almost seems as if something in the drive train is loose (bevel box mount?) and a harmonic is set up at low RPM's I'm attaching a link below to a video in which you can clearly hear what I'm talking about. [video:google] https://drive.google.com/file/d/0B9cgseXkIVq4ODhGYm9FQjBQVzZHeXUtbkN0RmJqVFE5RnNv/edit?usp=sharing[/video] I'm planning to pull the seat back and the center console to try to localize the rattle this weekend, but any suggestions are appreciated!
1965 Plus 4
2008 997 Turbo Cab
1981 Alfa Spider
1954 Austin Healey 100 (SOLD)
2013 M3W (SOLD)
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Joined: Jun 2013
Posts: 1,299
Has a lot to Say!
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Has a lot to Say!
Joined: Jun 2013
Posts: 1,299 |
 2013 M3W # 793 'Mosquito'
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Joined: Mar 2013
Posts: 414 Likes: 6
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OP
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Posts: 414 Likes: 6 |
Trying to fettle this myself and spare the cost of shipping the car to Arizona...
Before I pull the seats, I may remove the boot floor and have my wife drive me around the block, while I sit in the passengers seat and stick my head in the open boot and listen...the neighbors already think I'm nuts, this will confirm it...
1965 Plus 4
2008 997 Turbo Cab
1981 Alfa Spider
1954 Austin Healey 100 (SOLD)
2013 M3W (SOLD)
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Joined: Aug 2012
Posts: 2,360 Likes: 2
Talk Morgan Expert
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Talk Morgan Expert
Joined: Aug 2012
Posts: 2,360 Likes: 2 |
Sound look like compensator.
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Joined: Nov 2013
Posts: 786 Likes: 18
Talk Morgan Regular
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Talk Morgan Regular
Joined: Nov 2013
Posts: 786 Likes: 18 |
This strongly resembles the compensator or the drive shaft flywheel.
Generally noise resonates throughout the metal transmission.
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Joined: Nov 2013
Posts: 786 Likes: 18
Talk Morgan Regular
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Talk Morgan Regular
Joined: Nov 2013
Posts: 786 Likes: 18 |
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Joined: Aug 2013
Posts: 398
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Don't forget to get someone to video that test drive! It will be a Youtube record breaker!
Oct 13 build 4/4
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Joined: Oct 2012
Posts: 6,538
Talk Morgan Sage
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Talk Morgan Sage
Joined: Oct 2012
Posts: 6,538 |
Agreed - this sounds like typical Compensator failure - or at least starting to fail - its a horrible noise :(((( 
Last edited by m3boy; 27/03/14 06:35 AM.
Neil
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Joined: Jan 2013
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sorry to hear about the noise. it's also helpful to pull the transmission tunnel cover and driveshaft cover. by doing this you can drive around with it fully exposed and see if you can heard the sounds more directly as others have mentioned these sounds have a sneaky way of sounding like the are coming from one area but in fact another area far away.
B
blake
sfmorgan.tumblr.com
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Joined: May 2012
Posts: 1,796 Likes: 5
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,796 Likes: 5 |
Have to agree with M3BOY, my compensator started off like that and then got much worse.
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That's new, can't wait to find out what that is ... 
