What brake fluid for a '71 series 3 109?

buzzy bee · May 22, 2010

Hi

Pretty much as the title says, am I ok using Dot 4 in the series 3 109 1971?

Just going to try bleeding it, and didn't waqnt to put the wrong stuff in.

Cheers

Dave

martin1512 · May 22, 2010

Dot 3 is the fluid originally used, but Dot 4 would be fine.

hughesy · May 23, 2010

Whatever's the cheapest. About 12 quid for 5 litres from my local parts place was what I used last.

buzzy bee · May 23, 2010

Cheapest is Dot 4, as we have that in stock! hehe

newlad · Apr 16, 2011

hi all, i have a 1971 2a swb, any difference regarding 'dot' to the 109?
just out of curiosity, whats the relivance of the different dots? thickness?
cheers

fanatic · Apr 16, 2011

dot 4 is compatible with dot 3 ,later brake fluids are synthetic and not interchangeable

newlad · Apr 17, 2011

fanatic said:
dot 4 is compatible with dot 3 ,later brake fluids are synthetic and not interchangeable

cheers for that, so if 3 and 4 can be combined, what is the difference between them?
as i've drained my series 2a of fluid and dont currently have any, should it be dot 3 or 4?

fanatic · Apr 17, 2011

Brake fluid - Wikipedia, the free encyclopedia

Check brake fluid levels and specifications

viamphie · May 2, 2015

Thanks for this guys. Just got back from Halfords ,who told me I could only use DOT3 in my Landy but they don make it anymore. Bloody idiots! Guess I better scrap the Landy then. [emoji15].

honolulujoe · May 2, 2015

I use dot 4, according to people in the s1 club that is the one to use, dot 5 will damage the rubber bits in old landy systems apparently

btw amazon have dot 3

http://www.amazon.co.uk/Comma-BF1L-...=1430594627&sr=8-1&keywords=dot+3+brake+fluid

honolulujoe · May 2, 2015

looks like Halfords are talking bollocks again

Carlube Dot 3 Brake Fluid 1Ltr

ben waine · May 3, 2015

The only difference (that you should car about) with dot 3/4 is boiling point ! For 4 has a higher boiling point! And I am pretty sure both are 'natural' where as 5 and 5.1 are synthetic, the synthetic stuff will rot all the rubber in your system, also 5 and 5.1 have a even higher boiling point, but I think it's more for sports cars IIRC.

Blackburn · May 3, 2015

I would not by 5 litre as once open it starts absorbing water , unless of course you have a fleet of landrovers to deal with.

viamphie · May 3, 2015

honolulujoe said:
looks like Halfords are talking bollocks again

Carlube Dot 3 Brake Fluid 1Ltr

Out of stock!

It's euro parts so they must restock soon.

Thanks

viamphie · May 3, 2015

Honolulujoe. Thanks too. Click click. Purchased.

Castor · May 3, 2015

viamphie said:
Thanks for this guys. Just got back from Halfords ,who told me I could only use DOT3 in my Landy but they don make it anymore. Bloody idiots! Guess I better scrap the Landy then. [emoji15].

Never pay any attention to anyone from Halfords - they are not competent.

viamphie · May 3, 2015

Amen to that dude!

chris7 · May 5, 2015

I use silicone dot 5 in my series 3 1974 , it doesn't corrode paint work and it is not hydroscopic, nor does it require changing, absolutely no issues these past few years and its not too expensive, MG B Hive in Wisbech Cambs sell it cheapest!! Regards. Chris

viamphie · May 5, 2015

Chris7 did you do a complete flush or have you just added it to / topped up existing?

chris7 · May 5, 2015

Viamphe it has to be a complete flush the mineral and synthetic brake fluid are incompatible with silicone so its important that there is no residue from the mineral or synthetic brake fluid before using silicone Regards. Chris

What brake fluid for a '71 series 3 109?

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