yardpro

+ 1,000,000 on drbobs reccoendations.... i am having a nightmare of a time with beeding the lines..

Pfc. Parts

Charm

FredR

Scott,

Good point about the effect of high operating temps- have not really done any trackwork with this 928 -that being said we have no shortage of heat over here. Probably down to me losing my S4, introduction of radars and more chicken factor with age!

The Goodridge hoses we fitted by the local agents, they did not report any difficulties fitting them and to date they have been trouble free.

Rgds

Fred

dr bob

So, a few decades ago we could by ATE-rebuilt as well as new master cylinders for German cars I owned at the time. Along with the master cylinders came a kit with an assortment of plastic fittings that would screw into the various ports on the master cylinder. They were really plastic bleed nipples, didn't shut off when tightened, and the tapered tip actually sealed while the port was open. Along with all that was an instruction that encouraged you to use all those fittings and hoses to "bench bleed" the new or rebuilt part prior to installation. Simple stuff -- clamp the master cylinder level in a vise. Install the plastic fittings, and route the hoses that came with them right back into the reservoir. I used a office binder clamp to keep the hoses in place. Fill the reservoir with fluid. Using a screwdriver, push the piston in and out a few times slowly to get everything full, then a little faster until no more air bubbles were passing through the hoses. Then mount the master cylinder, remove each plastic fitting and immediately connect the corresponding original steel line. That way no air would be left in the master cylinder, only liquid all the way to the discharge port. Holding the cylinder level is important, especially if the discharge port is not at the top of the bore inside. I learned to do a few strokes level, some with node low, some with nose high, so there's no place for air to hide in the ends of either piston cavity area.

You can duplicate this function with a couple already-flared lengths of brake tubing from your local parts store. Just cut the line so you have a way to bend the steel and put the cut end into the reservoir. Two pieces of brake tubing will handle four line ports, but IIRC there are only three that have connections on them on the MC. The fourth on mine is already a bleeder port at the top front, so it gets a hose too run back into the reservoir.

You can probably do this on the car if you can adjust the car's attitude enough to get the MC level. Then gentle HAND pushes on the pedal, engine off. If your MC is corroded or has dirt in the front, there's a risk of damaging the front piston cups if you drag them across that area of the bore. Just be gentle on the pedal, don't jam it all the way to the floor while doing this, and hope the remaining air there in the front of the piston migrates out OK.

Pfc. Parts

I just knew there was a good story in there. Thanks.

Pfc. Parts

Strange

Pfc. Parts

Flat

dr bob

I did the bracket mod with a round file. Took a few minutes per bracket. I don't feel it compromised the connection. I also reused the original spring clip doohickies since the new ones aren't wide enough to work with the 928's brackets. All is well so far...

Pfc. Parts

Erf