65 impala drum brakes dragging - Impala Tech
Brakes & Suspension Conversion Questions & more

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post #1 of 3 (permalink) Old 05-20-2014, 10:20 PM Thread Starter
Join Date: Oct 2012
Location: New hampshire
Posts: 7
65 impala drum brakes dragging

I've got a problem with my 65 impala, with all new original replacement brake parts, after driving around for 5-10 miles my front brakes start to stick and hold pressure in the brake lines we've installed new master cyl., brake lines and rubber hoses, all wheel cylinders, brake booster and all springs, self adjusters, and start adjusters, the only thing we didn't change is the distribution block, I've been told there is a residual valve in there can someone tell me how to replace it, do I just order a distribution block? or can I replace just the residual valve? and where would I purchase one.
Please help as the car is almost a hundred miles from home at this time, and we are minutes from finishing the full 2 year restoration.
toolinarnd is offline  
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post #2 of 3 (permalink) Old 05-21-2014, 09:43 AM
Join Date: Jan 2006
Posts: 12,458
Are you sure that it is a brake line pressure issue. To verify it you would have to splice into the line and install a pressure gauge temporarily.

The much more likely issue is with the self adjusting brake actuator. It is either not adjusted correctly or installed incorrectly so that it is tightening the brakes when it shouldn't (either that or you back up a lot). They are designed to tighten the brakes every time you stop while backing up.

If out of adjustment it will cause the brakes to drag.

The two pound PSI residual valve was located attached to the frame where the brake lines split to go to the front and back of the car with a single cylinder master cylinder. and inside the distribution block if you have a dual master cylinder.

Big Dave
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post #3 of 3 (permalink) Old 05-22-2014, 07:40 AM
Join Date: Jan 2007
Location: Lewisburg, Ohio
Posts: 2,909
The 65's only had a T fitting. 2 lines to the front and one for the rear. I remember years and years ago my Dad use to remove the self adjusters as they caused problems he said.
You said you replaced the booster. The rod in the booster may be to long, holding pressure.
dadstoy is offline  
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