Attach a flexible hose to the bleeder screw at the top of the wheel cylinder Put other end into a container filled with clean brake fluid Ha … ve assistant pump brake pedal 3 times and hold approx. This process has caused more than one heated marital argument over the years. This is done by applying moderate pressure on the brake pedal and turning the ignition on for three seconds, then off. Why did you did all of this work? I did the Blazer bleeding procedure last abt 10 years ago without a scan tool. I replace all of my fluids in the spring. The most common bleeding procedure is to bleed the brake furthest from the master cylinder first, then bleed the other brake that shares the same hydraulic circuit which may be the other rear brake on a rear-wheel drive car or truck, or the opposite front brake on a front-wheel drive car or minivan.
Keep the pedal held down until the bleeder is fully closed or air is gone comme back in the system. I replaced all 4 calipers and the master cylinder on my 2004 Suburban. Now you have a more difficult job ahead of you. Posted on Mar 15, 2009 Have a look on this link below: In particular a Youtube video: Sometimes it can be a nightmare bleeding the brakes. Take the car for a test drive around the block and confirm that your work has paid off and everything is functioning as expected. If not is this scan tool a special dealer only scan tool or can I use one of the many aftermarket scan tools? There seems to be problem after problem or no progress, irrespective of how many times you bleed them. During this step, the pump runs and the respective release valve cycles for one minute.
If you have not done so I would recommend you have the system checked for codes. Raise the entire vehicle and remove jack stands. This article applies to the Chevrolet Silverado. Have a look on those two links. The modulator assembly uses solenoids for each brake circuit, but there are no special bleeder valves or special scan tool bleed procedure.
Tighten Tighten the nut to 9 Nm 79 lb in. The Scan tool method-- would that be for bleeding the system when air gets in? Modern cars are fitted with automatic brakes that are designed to use brake fluids and a pressure system. Right rear Left front Left rear Right front? You need to unbolt this connection, clean the surfaces and re-install. In the Chilton manual, it says 1. It is best to use a pressure bleeder. Over time the ground connection gets compromised by dirt, grease, or corrosion. Place the other end of the hose into the disposable bottle.
This is repeated for each wheel. It might be time to replace the brake master cylinder. We don't want that, so make sure it stays filled to its fill line. Release the brake pedal between each test. Air trapped in the lines, calipers or wheel cylinders will make the pedal feel soft and spongy. If so, that's a good sign because it means you correctly diagnosed air in the lines.
Once done with all the wheels, you can confirm if the brake fluid reservoir is indeed empty. Tell your assistant to hold the weight of his foot on the pedal and follow the pedal to the floor of the truck. This will cause fluid and possibly air bubbles to come out of the bleeder. There are two, so be sure you open the front one. Oh no no no, please. I fabbed my own clamp tools.
Step 2 — Remove the wheels You might be able to reach the bleeding nut with the wheels still on, but it'll be a big pain. Autozone sells it, not sure if they will loan you like they do with other tools. Use of this site constitutes agreement with the Copyright © 2005 by Francisco Burzi. My old fluid had turned goey in the master and I did a vacuum bleed on the system. Place a cup or empty butter container beneath the isolation-dump valve, which has four wires connected to it at the wiring harness. But it is better to do it with a tool like the Snap On Solus Ultra. Once you have located the resoviour, empty the existing brake fluid completely and refill with new brake fluid.
During this process, pause every couple of cycles to go look at the fluid reservoir. Open the bleeder screw on the bottom of the isolation-dump valve to release air from the valve. Place your drain pan beneath the passenger rear brake assembly. Couple thoughts on this one. Place the box-end wrench perfect fit over the bleeder screw.