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Jun 14th, 2026
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Joined: Feb 2019
Posts: 3,857 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,857 Likes: 2 |
How much oil/lube does the BB take if you fill it?
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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Joined: Jul 2013
Posts: 3,732 Likes: 79
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
Posts: 3,732 Likes: 79 |
Red Leader 
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Joined: Feb 2019
Posts: 3,857 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,857 Likes: 2 |
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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Joined: Dec 2017
Posts: 2,222 Likes: 182
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,222 Likes: 182 |
I don't understand why filling the BB to the vent plug could damage the seal as the BB does not operate under pressure (hence having a vent plug). If the vent plug was removed and a modified vent tube installed going vertically you could in theory increase the volume of oil to cover the workings and still vent.
Bruce
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice) tis no more
2013 M3W (Olga)
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Joined: May 2011
Posts: 1,625 Likes: 25
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2011
Posts: 1,625 Likes: 25 |
I don't understand why filling the BB to the vent plug could damage the seal as the BB does not operate under pressure (hence having a vent plug). If the vent plug was removed and a modified vent tube installed going vertically you could in theory increase the volume of oil to cover the workings and still vent.
Bruce I think the problem is that the existing orange vent plug will vent air but not oil, so if it overfilled the BB cannot vent and oil then leaks from the seal.
2021 M3W
2013 M3W - Sold
1971 4/4 2 Seater
1934 Sports
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Joined: Feb 2019
Posts: 3,857 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,857 Likes: 2 |
Liquids get hot and expand so if it cannot vent then the seals get stressed.
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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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 |
Put the Redline 80W250 synthetic gear oil in the bevel box the other day and did my first long(ish) run today in 27c ambient temperature. Not any real change from running with the Redline Shockproof. Sad to say, it doesn't seem to be a miracle cure for noisy bevel boxes.
Another thing to consider, in reply to britmog, if you overfill a gearbox, it usually makes it run hotter because of the increased friction and drag of the extra oil. Extra heat is not what you want in the M3W Bevel Box.
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Joined: Jul 2013
Posts: 3,732 Likes: 79
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
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I spent a few hours yesterday soundproofing the aluminium rear bulhead with Silent Coat Extra 4mm.
This has made much more of an improvement in bevel box noise than either Millers 140 or Redline 250.
Red Leader
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Joined: Jul 2018
Posts: 1,031 Likes: 2
Has a lot to Say!
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Has a lot to Say!
Joined: Jul 2018
Posts: 1,031 Likes: 2 |
I spent a few hours yesterday soundproofing the aluminium rear bulhead with Silent Coat Extra 4mm.
This has made much more of an improvement in bevel box noise than either Millers 140 or Redline 250.
Do you recommend that over Dynamat?
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Joined: Aug 2009
Posts: 557
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2009
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I just got en email from Emil at MorganCustom.net and he had developed a remote fill kit for the Bevel Box, which increases the oil capacity to 28oz. He should publish test results and temperature readings soon
2016 M3W, Army Green Matte/Tan Leather, 17k miles
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