cquisuila Posted April 20, 2023 Share Posted April 20, 2023 hello i wish to know what reference brake drums for my riviera. I think at diameter ext 12" and int 9.5". ac DELCO 18B381 ? 18B80 ? but i don't find the height... > i think to mesurate the height on mine in my car 1966. > IF you have severals references it is a great pleasure ! Philippe Link to comment Share on other sites More sharing options...
EmTee Posted April 20, 2023 Share Posted April 20, 2023 The maximum serviceable diameter (in inches) is cast into the drum. Link to comment Share on other sites More sharing options...
cquisuila Posted April 20, 2023 Author Share Posted April 20, 2023 7 minutes ago, EmTee said: The maximum serviceable diameter (in inches) is cast into the drum. there is a lot of drums efficient, i presume ! Link to comment Share on other sites More sharing options...
JZRIV Posted April 20, 2023 Share Posted April 20, 2023 Brake drum new specification 11.997" - 12.022" ID (inside diameter). Max allowable resurfacing/re-bore to 12.080" Per shop manual 3 Link to comment Share on other sites More sharing options...
cquisuila Posted April 20, 2023 Author Share Posted April 20, 2023 (edited) 8 minutes ago, JZRIV said: Brake drum new specification 11.997" - 12.022" ID (inside diameter). Max allowable resurfacing/re-bore to 12.080" Per shop manual strange ! i have in manual work 9.5 " i will mesurate ON MY CAR... Edited April 20, 2023 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
JZRIV Posted April 20, 2023 Share Posted April 20, 2023 You are looking in the 44000 series section of manual which is for smaller Skylarks. Look at the 49000 series section 1 Link to comment Share on other sites More sharing options...
cquisuila Posted April 20, 2023 Author Share Posted April 20, 2023 (edited) 5 minutes ago, JZRIV said: You are looking in the 44000 series section of manual which is for smaller Skylarks. Look at the 49000 series section yes but there is not reference unfortunaly on this page thank you for your real specfications with 12inch!! Edited April 20, 2023 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
JZRIV Posted April 20, 2023 Share Posted April 20, 2023 Page 50-37 of Chassis Service Manual Link to comment Share on other sites More sharing options...
RivNut Posted April 20, 2023 Share Posted April 20, 2023 I think when the brake drums are removed, you’ll quickly find out that your Riviera has 12” drums. 😁 1 Link to comment Share on other sites More sharing options...
cquisuila Posted April 20, 2023 Author Share Posted April 20, 2023 5 hours ago, JZRIV said: Page 50-37 of Chassis Service Manual i suck sorry !! thank you ! Link to comment Share on other sites More sharing options...
JZRIV Posted April 21, 2023 Share Posted April 21, 2023 13 hours ago, cquisuila said: i suck sorry !! thank you ! No need to apologize. Believe me on various occasions I have missed info in the service manuals. Sometimes finding the info in the manual can be as challenging as the repair! But the more you do it the better you get. LOL 1 Link to comment Share on other sites More sharing options...
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