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#1 Sweating Brake Reservoir Hose

Posted: Mon Mar 02, 2020 3:32 pm
by SESH
The brake reservoir hose on my series 3 is sweating.
So I will replace it.
Can anyone confirm best hose and dimensions.
I tried to measure the existing one on the car and the length looks to be about 30cm and the diameter of the outside is around 1.7 cm. But I think the internal dimension is normally the measurement to use.
Is Cohline 2337 suitable?
Thanks
Mike

#2 Re: Sweating Brake Reservoir Hose

Posted: Mon Mar 02, 2020 3:48 pm
by christopher storey
Mike : be warned that this is probably not sweating, but that the line has become porous and is weeping brake fluid, which can be highly damaging to paint . Wash everything down with water at very frequent intervals until the hose has been replaced

#3 Re: Sweating Brake Reservoir Hose

Posted: Mon Mar 02, 2020 5:37 pm
by Heuer
Yes, we know about it - see here: viewtopic.php?p=15015#p15015

You need Cohline hose.

#4 Re: Sweating Brake Reservoir Hose

Posted: Mon Mar 02, 2020 6:19 pm
by SESH
Thanks David and Christopher.
I am intending to get some Cohline 2337 from Merlin Motorsport.
Is this the correct pipe?
https://www.merlinmotorsport.co.uk/p/7m ... =2337-0613
Looks quite reasonable at £1.32 per 100 mm + VAT.
My current sweating pipe has a yellow line along its length.
Thanks again.
Mike

#5 Re: Sweating Brake Reservoir Hose

Posted: Mon Mar 02, 2020 7:08 pm
by rswaffie
I’ve just fitted that cohline hose from Merlinsport, as the hose I got originally from one of the etype parts suppliers sweated/leaked due to porosity (is there a difference?) after 3 months! That was after one of the new fluid reservoirs split at the spigot so I seem to have spent a lot of time mopping up fluid. :cussing:

#6 Re: Sweating Brake Reservoir Hose

Posted: Mon Mar 02, 2020 11:44 pm
by SESH
Thanks. Will get some ordered.
Mike