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Hey guys,
Just picked my 64 Impala up from a mechanic who was doing some work on her ... one of the jobs was to fit an HQ master cyl and HQ dics.
To cut a long story short this guy has really given me the jerk around .... and to top it off the job on the brakes is piss poor.
Bascially the pedal goes to the floor now .... the car stops but only just
I am assuming that he has cocked up the install on the master cyl .... can anyone tell me to what port on the mater cyl the front / rear circuts attach ?
And if these were around the wrong way would it expalin my brake problems ?
Vehicle is a 1964 Impala ... power brake option which came with 4 wheel drums.
Thanks
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Varies between master cylinders. Some have the rears on the front and some the other way around. The smaller fluid storage area is the rear. Make sure also he has used a drum/drum cylinder and not a disc/drum unit. Check with PBR on the part number if unc |
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You need a Disc/drum unit if you have the HQ discs on the front,otherwise the peddle will pump up and lock the front brakes up.The only difference between disc and drum mcyls is that drum mcyls have a one way valve in the outlet ports (to maintain line pr
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The larger threaded port coming out of the master is for the rear brakes
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A HQ drum front mcyl is a p7209
A HQ disc front mcyl is a p7210
A HX HZ disc front mcyl is a p7369
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I'm not with the car right now and so have not yet had time to do a brake line test.
I did have a quick peak yesrerday and it looks as though he has put the larger (9/16') port that is nearist the firewall to the front circut.
From what you guys are
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Thanks for the help, had a go at fixing this probeln over the weekend.
I changed the lines over to the M/Cyl to this confing :-
1/2' Front Fitting on P7120 M/Cyl to Front Disc Circut
9/16' Rear Fitting on P7100 M/Cyl to Drear Drum Circut
T
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Yes it sounds like thats the problem
Remove the nut again
Move the pipe out of the way
Get a self tapping screw and wind it into the brass olive
Wigglie it till it comes out
Remove the rubber "duckbill" valve and spring
Toss over shoulder
Refit ol
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The other thing you need to do is check that the rear brakes do have a residual pressure valve still in the m cyl
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