Question about Oldsmobile Cars & Trucks
Bleeder valves are located on the disc brake caliper itself. The image below shows the typical location. It is not necessary to remove the wheel to access the bleeder valve - it has been removed to make taking a photo easier and brighter.
You can access the bleeder valve from under the vehicle easily by driving it up on ramps, or by jacking and supporting with jack stands (never crawl under a vehicle that is supported only by a jack!).
The bleeder valve doubles as the outlet for the brake fluid. So, adding some flexible plastic tubing over the barb at the end will allow to to direct the air / fluid into a container and save a messy clean up. The image below shows the set up:
You will be able to slip a wrench on the valve and turn it as needed with the tubing in place.
Two-person bleeding is by far the most common method (there are others) and can be performed in any home garage without specialized tools. It does, however, require another person's help. Begin by cleaning the old fluid from the reservoir and either turn a full bottle of fresh fluid upside down onto the reservoir or make sure the reservoir is constantly topped off. Now is the time you need to find that extra person. Have him sit in the vehicle and pump the brake pedal several times to build pressure and remove the brake assist reserve. Open the bleeder valve and have your assistant pump the pedal four times, holding it down on the fourth pump until you re-tighten the valve closed. Don't lift off that pedal until the valve's tightened. Make sure the vacuum line drains into a bucket and repeat the process until a steady stream of fluid flows from the valve. Perform this step at each corner, several times until new fluid is visible. The process purges air from the system and as such will spurt and hiss fluid out until completely bled. A solid stream of clean fluid indicates the job is done at that particular corner. Be sure the person pumping the pedal does so no more than halfway to the floor. If it's pushed too far, you run the risk of driving the master cylinder's secondary piston across sediments or deposits that may have collected on the piston cylinder walls. This can permanently and quickly damage piston seals and cause leaks. Place a small block of wood underneath the brake pedal to ensure this doesn't happen.
There are plenty of links that discuss brake bleeding - a list of results on the subject can be found below:
I hope this helps & good luck!
Posted on Nov 08, 2012
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Posted on Jan 02, 2017
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