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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,896
Posts837,987
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Most Online1,063
Jun 14th, 2026
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Joined: May 2015
Posts: 1,815 Likes: 32
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2015
Posts: 1,815 Likes: 32 |
I still doubt it is the drive belt jumping teeth, it just won't happen. I could go with
1 Calum's swing arm bearing adjustment,
2 belt slap or (more likely) the
3 nodding BB with the NVH. Have a check around the BB and see if there are any signs of fouling?
or 4 maybe the tyre losing grip suddenly reversing the tension on the belt?
M3W5sp 2015, MSCC, MTWC, Oxon UK
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Joined: Mar 2011
Posts: 399 Likes: 15
Learner Plates Off!
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Learner Plates Off!
Joined: Mar 2011
Posts: 399 Likes: 15 |
A quick look at the Gates website suggests these belts are good for an "operating environment" of up to 85C (ie the enclosure not the belt temp). Our belts are pretty well air cooled admittedly in a partially enclosed area....when I have touched our belt soon after hard driving, it has never been above ~60C (you can continue touching).
Good luck sorting the banging - NVH or swing-arm sound likely sources
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Joined: Feb 2021
Posts: 61 Likes: 1
Just Getting Started
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Just Getting Started
Joined: Feb 2021
Posts: 61 Likes: 1 |
I fully agree . Alot of tech advice hear I’ve found flimflam , toss out any advice stuff. It’s very counter productive to the guy who’s diligently trying to get his Morgan on the road. . My experience- belt slip is completely UNMISTAKABLE. Sounds like a “ submachine gun “
Teeth are spaced evenly so are belt . When belt slips teeth incrementally . Result is a consistent pop pop pop ! Usually on a dip where slack is created in belt /suspension.
Or on hard acceleration from a stop 🛑. Odd to me out of thousands of Morgan 3 wheelers - this strange belt slip rationalization goes on ? Even the discussion of belt slip being technically impossible. Kinda funny . I can tell you I’ve had belt slip and fixed it . By tightening. I’ve gotten very proficient at it . More interesting is my belt tightening methods are spectacular. And I use almost none of the common advice or guidance . Belts slip ! Also not to confused the belt slip with the bevel box bang ! Belt slip is a Machine gun . Bevel box bang is a cannon that you feel hit your frame , Hard . Once you have a M3w awhile , you know exactly what’s going on .
Last edited by Mogegg; 05/08/22 11:41 PM.
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Joined: Jun 2012
Posts: 2,242 Likes: 72
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2012
Posts: 2,242 Likes: 72 |
Thank you for your insight. Just how long have you had your M3W?
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