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Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690515
24/02/21 12:03 PM
24/02/21 12:03 PM
Joined: Oct 2019
Posts: 1,852
Aberdeenshire
Image Offline
Talk Morgan Enthusiast
Image  Offline
Talk Morgan Enthusiast

Joined: Oct 2019
Posts: 1,852
Aberdeenshire
The only DOT 5 vehicle in my fleet is the Harley .... mid 70s 'banana' brake calipers .... keep a bottle handy for that .... would like to standardise throughout but dismantling and purifying every little bit of the braking system doesn't appeal.

K

Re: Silicone Brake fluid - Holy Grail [Re: Peter J] #690525
24/02/21 12:53 PM
24/02/21 12:53 PM
Joined: Apr 2014
Posts: 5,007
Llanelli
Ray Offline
Charter Member
Ray  Offline
Charter Member

Joined: Apr 2014
Posts: 5,007
Llanelli
Originally Posted by Peter J
Another comment, dragged out of my bike days memory, is to replace all the flexible hoses with Aeroquip or similar high spec lines: it was believed that most of the moisture got into the fluid through the hose walls.. No idea if it is true, but on a bike braided hoses with nicely anodised couplings look so cool...
. That's another mod my +8 had, seems to keep a firmer peddle feel


.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690528
24/02/21 12:57 PM
24/02/21 12:57 PM
Joined: May 2010
Posts: 7,878
Llanelli
sospan Offline
Talk Morgan Guru
sospan  Offline
Talk Morgan Guru

Joined: May 2010
Posts: 7,878
Llanelli
The photo you show the rusted cylinder on is due to rust outside not internal so brake fluid won’t stop that. If it does you have leaks!
As you are doing a rebuild then now is the time to consider upgrades. That way you are only replacing old parts with upgrades so not much more £.
Braided pipes is an obvious easy one. Invest in a brake bleeder kit so you can do one man fluid changes easier either annually or every 2 years. No need to have a pedal pumper then! Dot4 fluid is not expensive so you can get fresh every time. The brake system is reasonably airtight so no big exposure to moist air. It can become part of routine checks/maintenance.


Red Plus8
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690533
24/02/21 01:37 PM
24/02/21 01:37 PM
Joined: Dec 2007
Posts: 531
Beaumont de Lomagne, France
P
Philippo Offline
Talk Morgan Regular
Philippo  Offline
Talk Morgan Regular
P

Joined: Dec 2007
Posts: 531
Beaumont de Lomagne, France
Just my twopence worth based on a couple of cars that I put back on the road for friends. Firstly a TR5 that had been asked up in a barn for 12 years with silicone brake fluid and normal Dot4 clutch fluid. The brakes worked absolutely fine but the clutch hydraulics were shot. And a Jag E Type that had been parked up 5 years where both clutch and brake circuits needed complete overhaul. In my Plus 8 four seat currently nearing end of rebuild I've asked that they put silicone fluid.

Cheers


Philip

In-build 1985 +8 4 seater
Malone F1000 - track car
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690542
24/02/21 02:45 PM
24/02/21 02:45 PM
Joined: Dec 2008
Posts: 19,319
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 19,319
South Yorkshire
I do a fluid change every two years. My Roadster rear cylinders lasted 14 years, which is good enough!


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4
Re: Silicone Brake fluid - Holy Grail [Re: Deejay] #690564
24/02/21 04:10 PM
24/02/21 04:10 PM
Joined: Nov 2015
Posts: 3,542
Yorkshire
CooperMan Online content
Just barreling along
CooperMan  Online Content
Just barreling along
Talk Morgan Addict

Joined: Nov 2015
Posts: 3,542
Yorkshire
Originally Posted by Deejay
Agree with everyone else on this. Dot 4 changed regularly.
As far as rusting is concerned, I don’t think that the hygroscopic fluid is totally to blame. When you go through a puddle, water is easily able to enter the brake drum. Many people who have suffered corroded cylinders seem to have it most commonly on the nearside (where puddles are most prevalent on the roadside. )
Also, when parked up, moisture can condense inside the drum as it cools. If not driven for a while, I sometimes hear a rear brake squeak going down my driveway but it soon disappears as surface rust rubs off.
For longevity, when fitting new cylinders best to peel back the rubber boot and pack with Ceretec grease or similar, something manufacturers often fail to do.

That's the trick, thumbs checked annually whilst 'bleeding' I also apply a tiny bead of Ceratec around the exposed pistons in the front calipers with a fine paint brush (pads out job)


Jon M
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690572
24/02/21 04:56 PM
24/02/21 04:56 PM
Joined: Aug 2017
Posts: 321
Bergen, Norway
R
Robbie Mathisen Offline
Learner Plates Off!
Robbie Mathisen  Offline
Learner Plates Off!
R

Joined: Aug 2017
Posts: 321
Bergen, Norway
So DOT 4 is ok PROVIDED you change brake fluid every other year or so, and DOT 5 is ok PROVIDED you flush your system thouroughly and get rid of absolutely all old brake fluid before you fill in DOT 5 silicone.I went for the second alternative. I know plenty of Morganeers that do not remember when they changed DOT 4 last time - possibly dangerous, but to err is human.
I took exeptional care with flushing when I changed to DOT 5, so I think that problem is taken care of once and for all. And I need not worry about the DOT 4 absorbing water and thus lowering the boiling temperature, neither the water content in the fluid sinking to the bottom of the system possibly inducing corrosion, when the car is stored for a long time during winter. So silicone for me. Cannot see why not, again provided you do the fluid change job to perfection - once. Now, I have a fairly modern car - 2004, so there should be no issue with rubber sealings, gaskets etc.Wether this is a problem with old cars, I do not know.


Robbie the Norseman
2004 V6 Roadster
Sherwood green
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690596
24/02/21 06:29 PM
24/02/21 06:29 PM
Joined: Nov 2018
Posts: 507
Germany, Rhein-Main Area
X
xc68anc Offline
Talk Morgan Regular
xc68anc  Offline
Talk Morgan Regular
X

Joined: Nov 2018
Posts: 507
Germany, Rhein-Main Area
All brakefluids have light and shadow. And: you can‘t easy change from one fluid to another.

You must change all rubbers and clean the whole system. Two years ago I want this for a bicycle. All cleaned, all rubbers new
and all blowed through with high pressure. The brake works for two or four rides.

The do a rustprotection use this:
https://www.amazon.de/ATE-03-9902-0...hy=9044511&hvtargid=pla-540844569316

Greets René


2018 plus4
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690607
24/02/21 07:16 PM
24/02/21 07:16 PM
Joined: Nov 2018
Posts: 63
South Yorkshire
Tonyh157 Offline
Just Getting Started
Tonyh157  Offline
Just Getting Started

Joined: Nov 2018
Posts: 63
South Yorkshire
Am I right in thinking that Silicone brake fluid and synthetic fluid are not the same ? I can buy synthetic that is Dot 4 compliant, is that compatible with”normal” fluid. If so what’s the advantage of synthetic?


Tony

1994 Connaught Green Plus 4
Re: Silicone Brake fluid - Holy Grail [Re: BuyBritish] #690615
24/02/21 08:14 PM
24/02/21 08:14 PM
Joined: Aug 2008
Posts: 90
UK
clubsport Offline
Just Getting Started
clubsport  Offline
Just Getting Started

Joined: Aug 2008
Posts: 90
UK
When I rebuilt my 4/4 with a new braking system, that includes new master cyclinder, calipers, kunifer brake lines, wheels cylinders & stainless brake hoses. I filled it with silicon brake fluid.

It has been faultless, I ran the original fluid for 15 years and changed the fluid around 3 years ago. For a car that is used on better days, it is an ideal solution in my experience.

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