Quote:
Originally Posted by SD1too
Hello David,
Are you calling the "rear" port that nearest to the brake servo?
Is fluid being supplied from the other port?
This is important because you've said that fluid is unavailable at all four wheels.
You also said that this fault occurred after your mechanic fitted a new brake pipe. Which one?
Simon
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I wonder with the cylinder off the car the piston can be moved fully and smoothly to the full extent of its stroke ?
With the master cylinder full and both ports temporarily plugged it should be easy to see if the master cylinder is at fault, i.e. with both ports plugged it should be impossible to to push the piston to its full travel, if so he needs to look elsewhere.
Whilst plugged, if the piston can be pushed to it's full extent, then it looks like problems at the reservoir to cylinder valve assembly being faulty, in that in normal operation the first few MM of movement of the piston the reservoir is sealed off from the cylinder allowing pressure to be applied to the system, a similar effect an also be caused by faulty piston seals.
How to seal off the ports is quite simple. 2 X brake pipe nuts to suit, 2 X short pieces of copper brake pipe suitably flared ( male or female to suit the port ) at one end and soldered shut at the other end.
There appear to be a few used ones about such as this one.
https://www.ebay.co.uk/itm/275206989...wAAOxy14VRRMlF