87 Chevy S10 Blazer seized caliper [resolved]

bowtie · 11-27-2005, 10:17 AM

I've replaced nearly everything...calipers, pads, master cylinder; bled the lines...and the front passenger side caliper won't release. Not sure what else to do...any ideas on what to do next??

1987 Chevy S10 Blazer 2.8L 6 Cyl 4x4

**JamesO** · 11-27-2005, 10:28 AM

The most common problems I have seen are poorly lubricated caliper slides and/or corroded hardware and slides causing the caliper to hang and drag, overheating the brakes and making the rubber parts hard and the caliper(s) to hang.

Or contamination of the brake fluid. I see you claim you bled the brakes, but is is possible that some petroleum based fluid was mixed in the system. Petroleum based products will cause all the rubber to swell and jam the calipers.

What is going on with the brake pads. Only 1 wearing? Inside/outside? or both just on 1 side?

Also have you replace the caliper with a "loaded" caliper? Rebuilt with brake pads installed? Did you replace the brake pads on both sides with the same type?

JamesO

**Midnight Tech** · 11-27-2005, 11:00 AM

Does that caliper release when you crack the bleeder screw loose? If it does, that's gonna be a collapsed brake hose.

Mullet Man · 11-27-2005, 08:10 PM

The collapsed brake hose is a common thing. Sometimes the inside of the hose will get weak and cause a collapse or a flapper.

buddycraigg · 11-29-2005, 03:06 AM

what was the reason you start replacing stuff?

was it that your right front caliper wouldn't release? or is there more to the story?

bowtie · 12-03-2005, 05:14 AM

Thanks all! It was the brake hose! It appeared fine allowed fluid to pass through, but was collapsing on the inside acting as a one-way valve.

11-27-2005, 10:17 AM	#1 (permalink)
bowtie Registered User Join Date: Nov 2005 Posts: 2 OS: XP	87 Chevy S10 Blazer seized caliper [resolved] I've replaced nearly everything...calipers, pads, master cylinder; bled the lines...and the front passenger side caliper won't release. Not sure what else to do...any ideas on what to do next?? 1987 Chevy S10 Blazer 2.8L 6 Cyl 4x4

11-27-2005, 11:00 AM	#3 (permalink)
Midnight Tech Admin/Head GreaseMonkey/Igor's alter ego/Grand Exalted PoohBah Join Date: Dec 2001 Location: SC Posts: 2,769 OS: Windows XP SP2/Windows 98SE/Fedora Core 6/RH 7.2 with Autopoint	Does that caliper release when you crack the bleeder screw loose? If it does, that's gonna be a collapsed brake hose. __________________ Please post all questions in the appropriate forum. Questions sent by email or PM will not be answered. Sharing my life...with my Imzadi! Interested in Trek gaming? Check out the Dynaverse! Proud supporter of the Carolinas Aviation Museum. If we have helped you in any way, please donate to keep TSF up and running!

11-27-2005, 10:28 AM	#2 (permalink)
JamesO Join Date: Mar 2005 Location: Fairfax, VA USA Posts: 2,289 OS: 98SE, W2k Pro, XP Pro	The most common problems I have seen are poorly lubricated caliper slides and/or corroded hardware and slides causing the caliper to hang and drag, overheating the brakes and making the rubber parts hard and the caliper(s) to hang. Or contamination of the brake fluid. I see you claim you bled the brakes, but is is possible that some petroleum based fluid was mixed in the system. Petroleum based products will cause all the rubber to swell and jam the calipers. What is going on with the brake pads. Only 1 wearing? Inside/outside? or both just on 1 side? Also have you replace the caliper with a "loaded" caliper? Rebuilt with brake pads installed? Did you replace the brake pads on both sides with the same type? JamesO

11-27-2005, 08:10 PM	#4 (permalink)
Mullet Man Registered User Join Date: Oct 2005 Location: Ohio -=USA=- Posts: 174 OS: XP Professional	The collapsed brake hose is a common thing. Sometimes the inside of the hose will get weak and cause a collapse or a flapper.

11-29-2005, 03:06 AM	#5 (permalink)
buddycraigg Registered User Join Date: Nov 2005 Posts: 82 OS: 2000 98	what was the reason you start replacing stuff? was it that your right front caliper wouldn't release? or is there more to the story?

12-03-2005, 05:14 AM	#6 (permalink)
bowtie Registered User Join Date: Nov 2005 Posts: 2 OS: XP	Thanks all! It was the brake hose! It appeared fine allowed fluid to pass through, but was collapsing on the inside acting as a one-way valve.