<VV> Blocked brake hose

FrankDuVal corvairduval at cox.net
Mon Oct 16 22:46:13 EDT 2017


"This never used to be a problem - I think it co-incided with 
manufacturers changing to a new type of non-porous hoses - they 
suspected the earlier ones would let water in."

They changed the rubber formula back in the 50s or 60s? That's how old 
some of the hoses with problems are.

Again, like all brake parts, parts that save your life in emergencies, 
if the master cylinder is cruddy at the bottom of the stroke, then it 
should be rebuilt, not babied to not hurt it! Reminds me of the older 
people, back when I started driving,  who told me not to step on the 
brakes hard, something might break!

Yes to the hard harder test. It shows the weak parts that need fixing 
now. Despite those old people mentioned above! ggg

Frank DuVal


On 10/16/2017 1:18 PM, Hugo Miller via VirtualVairs wrote:
> ### Yes indeed! If they had fitted the wheel cylinders the other way 
> up it would have been a lot easier. Like a lot of things however, once 
> you know what you're up against it's not too bad.
> I will try that pressure test on the brake lines - as I said in 
> another post, this is not something I've encountered before - being 
> originally from the UK (now in Florida) the salt always eats steel 
> brake pipes from the outside before they can corrode from the inside.
> I have heard of flexible hoses blocking or acting as one-way valves 
> before - usually this makes the brakes lock on - mine was the other 
> way around.
> This never used to be a problem - I think it co-incided with 
> manufacturers changing to a new type of non-porous hoses - they 
> suspected the earlier ones would let water in.
> Another thing to be careful of if you're keeping the old master 
> cylinder is never to push the pedal all the way down when bleeding - 
> if you do, the piston will be in parts of the bore that it's never 
> seen before, and there might be some corrosion in there that will 
> damage the seal.
> Incidentally, for quickness I got brake shoes and hoses from Autozone 
> across the street from me. I'm amazed that I could order parts for a 
> car that's been out of production for fifty years at 8.00 on a 
> Saturday evening and I'd have them by Sunday afternoon - you don't get 
> that kind of service in the UK! They didn't list the cylinders so I 
> got them shipped down from Clarks, equally fast but UPS overnight was 
> expensive!
>



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