B

buzzy bee

New Member
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
 
Whatever's the cheapest. About 12 quid for 5 litres from my local parts place was what I used last.
 
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
 
dot 4 is compatible with dot 3 ,later brake fluids are synthetic and not interchangeable
 
fanatic said:
dot 4 is compatible with dot 3 ,later brake fluids are synthetic and not interchangeable
Click to expand...

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?
 
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].
 
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.
 
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 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].
Click to expand...

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