bc65riv Posted March 9, 2017 Share Posted March 9, 2017 Went on a rod run last year ----very slow going, hot weather and brakes started to fade. I have a dual master installed. Could it be getting too hot and what is the cure? also looking for 4 note horns or best replacement with similar sound frank Link to comment Share on other sites More sharing options...
still looking Posted March 9, 2017 Share Posted March 9, 2017 Perhaps you are boiling the fluid. Is it fine cold ? Does it get progressively worse ? Is this since the conversion ? Have you checked for leaks ? Link to comment Share on other sites More sharing options...
Pat Curran Posted March 9, 2017 Share Posted March 9, 2017 If you are a member of the ROA, check out the vendors for the 4 note horns. The underside of the hood should be pre-drilled for this option so it is a straightforward installation. Cadillac offered additional horns but the ones I have seen are different in appearance. Not sure if the sound is similar or not. Link to comment Share on other sites More sharing options...
RivNut Posted March 9, 2017 Share Posted March 9, 2017 This guy is an ROA member who has quite a few parts. You can see some four note horns on a shelf in one of the pictures. Theresearch a complete set in including wiring harness in picture 13. You should be aware that each of the three years had different horns - different lengths and different musical notes. There are I'D numbers stamped on the horns that I'D them. Ed http://redirect.viglink.com/?format=go&jsonp=vglnk_148909062639214&key=c81177253a52b296f324af540b3d8eea&libId=j02u3o7p010004qo000MAa352edu1&loc=http%3A%2F%2Fforums.aaca.org%2Ftopic%2F289460-what-steering-box-for-64%2F%3Fpage%3D2%23comment-1576654&v=1&out=https%3A%2F%2Fspringfieldil.craigslist.org%2Fpts%2F5936566316.html&ref=http%3A%2F%2Fforums.aaca.org%2Fforum%2F73-buick-riviera-riviera-owners-association%2F&title=What steering box for 64%3F - Page 2 - Buick Riviera - Riviera Owners Association - Antique Automobile Club of America - Discussion Forums&txt=https%3A%2F%2Fspringfieldil.craigslist.org%2Fpts%2F5936566316.html Link to comment Share on other sites More sharing options...
petelempert Posted March 9, 2017 Share Posted March 9, 2017 I think we'd need to know some additional details about your current brake set up to help with the fade problem. Is your system stock, modified, partially modified? In my experience, fade is usually brought on by heat from excessive use (race track conditions, pulling a trailer, extended downhill driving) rather than the "slow going" you refer to. I interpret "slow going" as traffic in hot weather which isn't ideal but shouldn't create enough heat to overtax/fade a healthy braking system. Give us some more details. PRL Link to comment Share on other sites More sharing options...
RivNut Posted March 10, 2017 Share Posted March 10, 2017 Low grade brake fluid will tend to "boil" under pressure. Make sure that you're using at least a Dot 4 brake fluid. Dot 3 and 4 are compatible but Dot 5 is for newer systems. If your car has the original fluid in it, it's probably time to flush and refill. How many miles on the brake drums. Perhaps you've gone beyond the maximum allowable limits for "meat" on the steel liner in the aluminum drum. Link to comment Share on other sites More sharing options...
1965rivgs Posted March 10, 2017 Share Posted March 10, 2017 9 hours ago, bc65riv said: Went on a rod run last year ----very slow going, hot weather and brakes started to fade. I have a dual master installed. Could it be getting too hot and what is the cure? also looking for 4 note horns or best replacement with similar sound frank Does it feel like the brakes are dragging after driving for awhile? If so, you could be overheating the linings and causing them to fade. Check the free play between the brake pushrod and the piston in the master you installed. If there is not enough freeplay the piston will not fully release the pressure in the hydraulic system and can cause the brakes to drag. Tom Mooney Link to comment Share on other sites More sharing options...
EmTee Posted March 10, 2017 Share Posted March 10, 2017 13 hours ago, RivNut said: Dot 5 is for newer systems DOT 5 is silicone-based fluid and is NOT compatible with DOT 3 or 4. Also, DOT 5 is not recommended for use in ABS brake systems, as it is susceptible to foaming. Link to comment Share on other sites More sharing options...
60FlatTop Posted March 10, 2017 Share Posted March 10, 2017 Pull a rear drum off and roll the edge of the rubber wheel cylinder seal back. See if there is reddish brown mud is in there. That's a good place to start. Bernie Link to comment Share on other sites More sharing options...
lrlforfun Posted March 10, 2017 Share Posted March 10, 2017 OK BC: While the drums are off for the initial physical inspection I'd suggest mike-ing the drums. I believe some states have a max of .60 that can be cut. Thin drums (and shoes) can cause brake fade too. Mitch Link to comment Share on other sites More sharing options...
RivNut Posted March 11, 2017 Share Posted March 11, 2017 If you look in your chassis manual, you'll find a maximum safe diameter for your drums. While replacements that aren't in the same condition may be hard to find do, your drums can have new stellar liners inserted. Check the classifieds in the Riview for the name of the service which does this. Ed Link to comment Share on other sites More sharing options...
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