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Aug 24th, 2023
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Joined: Jan 2014
Posts: 1,075
Has a lot to Say!
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Has a lot to Say!
Joined: Jan 2014
Posts: 1,075 |
After re-reading the post on the rebuild, I got to thinking about front pinion bearing lubrication. If all the original, and not certain about current BB's, had the black slim for oil, it's very possible that the front bearing gets very little to none of the oil.  If you look above the pinion gear, you can see a very small slit in the housing/plate. I'm sure there is one on the bottom as well. I would guess this is where the oil gets routed to the pinion bearings. If you guys are indeed flooding the housings up to the vent with oil, then the pinion bearings "should" get oil. But I'm still a proponent to NOT flooding the case and only filling up to the side hole. If you look at the newer GL1800 Goldwing final drives, they have a vent on top, drain on the bottom and a side hole that you fill to. They also state to use 80/90 weight oil, it's cast right in the housing. But overall it sounds like the BB noise problem on new M3W's has lessened to an acceptable level. I hope that older M3W's have had it worked out by now. Good luck guys.
Dan
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Joined: Sep 2016
Posts: 160
L - Learner Plates On
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L - Learner Plates On
Joined: Sep 2016
Posts: 160 |
Hi all as usual I am a mile behind my late 2012 makes all sorts of noises but most covered by wind noise and the exhaust. I have everything factory so what noise is the issue and how do people pinpoint it?
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Joined: Oct 2016
Posts: 1,544
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Oct 2016
Posts: 1,544 |
I think the main bugbear is the winning noise! gets quite loud at times, makes them sound like a demented electric milk float......
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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 |
Very interesting pic Dan ..many thanks good to see.
Neil
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Joined: Nov 2016
Posts: 400
Learner Plates Off!
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Learner Plates Off!
Joined: Nov 2016
Posts: 400 |
2012, 2800 miles, ali sprocket, actually very quiet at all speeds, better than I thought it would be
Superdry
76 Fizzy
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Joined: Mar 2013
Posts: 712 Likes: 8
Talk Morgan Regular
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Talk Morgan Regular
Joined: Mar 2013
Posts: 712 Likes: 8 |
Guys
The information you've started to collate is great, I'm wondering if we could push it a bit further and see if we can build a better picture.
Questions i'd like to add (if possible?);
Has the noise got worse over time (or constant)?
What tension have you got the belt at?
Is the belt alignment true (as far as you can tell)?
As Chriss99 says noise is subjective, vehicles that leave the factory are found to be acceptable / within our parameters during road test.
Mark Evans Here's the updated report with the extra info.  RogG and Nippymog - I've left your record as "Noisy" and included the comments on it being OK when cold (mine is he same). Does this point to a need for a thicker oil and/or cooling duct? Dear all, Is this report still correct ? Are all bevel boxes which where reported as quiet still quiet ? Or ....... (sometimes miracles exists).... is there a noisy bevel box which got quiet ? If yes, is there a reason ?
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Joined: Oct 2015
Posts: 1,490
Has a lot to Say!
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Has a lot to Say!
Joined: Oct 2015
Posts: 1,490 |
Mines gotten even quieter. Could partially be due to lower winter temps... we'll see.
The Original Ken
11,000 miles.
2014 BMW R9T
2005 Saabaru
2005 Saabaru
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Joined: May 2012
Posts: 1,790 Likes: 3
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,790 Likes: 3 |
Mine is now noisy after about 30 miles especially in the 50-60mph range.
It has become more noticeably so after I fitted the Supermax sprocket, the old sprocket was probably drowning out the BB whine so it couldn't be heard.
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Joined: Oct 2007
Posts: 423 Likes: 2
Learner Plates Off!
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Learner Plates Off!
Joined: Oct 2007
Posts: 423 Likes: 2 |
Mine only has about 200 miles on it (have only had it about a week) but betweeen 40-60 mph it is very loud
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Mar 2014
Posts: 1,673 Likes: 25
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Mar 2014
Posts: 1,673 Likes: 25 |
At the time of the survey, mine was quiet but it did get noisier with more miles clocked up during last summer. I would classify it as 'noticable' rather that 'screaming'. I can't comment on what it's like now as the car has been keeping cozy under a blanket since September...
I would certainly be interested in a permanent solution - especially if it simplifies (or reduces the requirement for) oil changes!
Andy
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