David Mason 0 Posted March 15 Share Posted March 15 Is there supposed to be a compression spring between the little pistons? My rebuild kit didn't include one. The old part didn't contain one, but the last guy who worked on the brakes was seriously lacking, so I just don't know... Link to post Share on other sites
BuckeyeSVT 81 Posted March 16 Share Posted March 16 IIRC there is a spring in the wheel cylinder. Most people lose them when rebuilding as most kits only include the inner pistons and outer seals. -Dominic Link to post Share on other sites
David Mason 0 Posted March 16 Author Share Posted March 16 And the world will continue turning if I don't install this part? Link to post Share on other sites
BuckeyeSVT 81 Posted March 16 Share Posted March 16 I believe the spring provides tension to keep the pistons pushed out. Without it, the pistons could be allowed to retreat further than designed which could cause the shoes to slide off of the piston slots and create a negative contact situation inside the drum. Link to post Share on other sites
BuckeyeSVT 81 Posted March 16 Share Posted March 16 Besides, wheel cylinders cost around $14 each.. even less on RockAuto. Is it worth it to ride around with missing parts? Link to post Share on other sites
mondeoman 32 Posted March 22 Share Posted March 22 Yes, spring is required on rear wheel cylinders (drum brakes). Rebuild kits may or may not contain these springs. Rebuild kits typically contain piston seals and end cap seals. Most auto parts sources moving to replacement wheel cylinders. Back in the day we use to clean up the inside of the wheel cylinders with honing stones in order to remove pits that are a result of water (contaminated brake fluid). Failure to remove these pits will quickly result in the failure of the replacement piston seals. Moral of the story here: Bleed your brake fluid completely once every 2 to 3 years. Way frequently overlooked procedure. Link to post Share on other sites
BuckeyeSVT 81 Posted March 23 Share Posted March 23 And people wonder why the imports last longer than domestics? Scheduled service, that's what. Brake fluid changes are every 30K on Toyota's and other vehicles (our age that is). Link to post Share on other sites
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