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Jun 14th, 2026
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Joined: Nov 2006
Posts: 921 Likes: 47
Talk Morgan Regular
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Talk Morgan Regular
Joined: Nov 2006
Posts: 921 Likes: 47 |
Lorne,
Emerald Isle is lovely and sunny to-day and forecast to stay this way until next Tuesday at least!!!
Robbie Dammit! You have made our lives confusing. We ferry the channel tommorrow with Spain in our sights. Lorne & Audrey (who LOVE Ireland)
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Joined: Nov 2014
Posts: 2
New to Talk Morgan
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New to Talk Morgan
Joined: Nov 2014
Posts: 2 |
What a marvellous help, many thanks I will investigate further.
One further question however - how do I flush the system? Hi, Forgive me for possible overkill..but I have found it always best to give a complete explanation than a short and sweet one. Automobile hydraulics (clutch and brake) use special fluids. The different types are designated as DOT 3, DOT 4, DOT 5 and DOT 5.1. DOT 5 is silicone based and the rest are borate ester based. (The higher the number the higher the boiling point.) DOT 5 is NOT compatible with the others and switching to and from DOT 5 can cause grave problems. Avoid DOT 5 like the plague. However, once used, you must continue to do so. You cannot safely switch back without changing every bit of rubber in the system. All brake fluids are designed to resist the absorption of water. That ability fades over time. Brake fluids (in clutch or brakes)should be changed once every 2-3 years depending on how damp your climate is. Lorne Hi Lorne, I apologise for this being my first post and don't want to appear to be coming on here waving a big stick at anyone. I browsed through the rest of this topic briefly and found that no one picked up on a point you made about brake fluid being designed to resist water but this information is inaccurate. All brake fluids discounting the silicone Dot 5 are Hydroscopic and absorb moisture from the atmosphere, When this happens, the moisture in the system can heat up and evaporate as we are continually using the brakes/clutch. The only thing left in the system to replace the evaporated moisture is air, as air is compressible, it renders the system inefficient and tell tail signs at the pedal indicate this. With a brake pedal, it becomes spongy, (with a servo assisted system, the spongy effect is only noticeable if the vacuum is exhausted) with a clutch, it effects smooth gear changing. Hydroscopic fluids also contaminate the system as moisture increases and begins to corrode the internal parts of the system. This is the reason we change the fluid in our systems periodically. http://en.wikipedia.org/wiki/Brake_fluidPaul
Vehicle restoration since 1986, here to help if I can
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Joined: Jul 2007
Posts: 28,899 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,899 Likes: 352 |
Not hydroscopic - hygroscopic...  Otherwise, absolutely agree... Oh, and welcome to TM! 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: May 2010
Posts: 9,545 Likes: 132
Needs to Get Out More!
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Needs to Get Out More!
Joined: May 2010
Posts: 9,545 Likes: 132 |
Change the fluid every 2 years...do clutch and brakes at same time. Hygroscopic nature means it will deteriorate. From your description of the pedal travel and " bite" point a fluid change is the best first option. Persistent problems could then be master/ slave cylinder servicing needed. Also.... check the gear remote for function. There could be rubber bush wear or even the " dust cap" over the lever issues. See Gomog site workshop manual for details. If all these fail then it's the BIG JOB - clutch out to check/ repair! 
Plus Four MY23 Furka Rouge
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Joined: Nov 2014
Posts: 2
New to Talk Morgan
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New to Talk Morgan
Joined: Nov 2014
Posts: 2 |
Not hydroscopic - hygroscopic... Otherwise, absolutely agree... Oh, and welcome to TM! Hi Graham, couldn't remember the name but in the wikipedia link within my post it mentioned hydroscopic  I just checked the term hygroscopic, I'll remember it in future.  Cheers
Last edited by Paul Noone; 10/11/14 10:38 PM.
Vehicle restoration since 1986, here to help if I can
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Joined: Jul 2007
Posts: 28,899 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,899 Likes: 352 |
No worries Paul, just the pedant in me. I often see it written incorrectly. Wikipedia is only as good as those adding information. Looooong time since I was in Perth... 1992,  wonder where the time has gone...
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Feb 2020
Posts: 586 Likes: 21
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2020
Posts: 586 Likes: 21 |
Researching clutch pedal issues on the web has led me to this thread which is much appreciated so I’d like to take the opportunity to thank the contributors, and of course Simon for keeping it all going
"DOT" 35th Anniversary Edition Plus 8- family owned from new. Rolls Royce Pewter.
06 Saab 93
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Joined: May 2009
Posts: 238 Likes: 3
L - Learner Plates On
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L - Learner Plates On
Joined: May 2009
Posts: 238 Likes: 3 |
It may be worth checking the gearbox bias, my spring had broken making selection of 3rd & 4th gears difficult
1999 Morgan Plus 8. 3.9 ....
1961 Alvis TD21 Series1 3 Litre Auto....
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