Need to bleed?
Need to bleed?
I've done a ton of searching and reading about changing brake pads and I'm going to be swapping out my stock dust makers for a set of PosiQuiet Ceramics at all four corners this weekend. Heck, I even have the shop manual for all the step by step instructions but I really love Andrew's clearly written instructions for both front and rear pad replacement (they show up countless times on this forum!!!). Thanks for that, Andrew!
My only real question concerns the need to bleed the brakes when changing the rear pads: the manual says to remove some of the brake fluid from the master cylinder when doing the rear pads and then top it off and bleed the system after installing the new pads. Andrews instructions don't mention the need for this, nor does anyone else's comments regarding rear pad install. Why the discrepancy? Would I be advised to do one side, then start the car and pump the brakes, shut down and do the other side or can I do both sides before starting/pumping?
I'm reasonably adept at this sort of thing and will be doing this work with some friends who have vast experience with this sort of thing. I'm just looking to expand my own knowledge base a bit... and I really don't want to screw anything up as I like being able to stop without running into things.
My only real question concerns the need to bleed the brakes when changing the rear pads: the manual says to remove some of the brake fluid from the master cylinder when doing the rear pads and then top it off and bleed the system after installing the new pads. Andrews instructions don't mention the need for this, nor does anyone else's comments regarding rear pad install. Why the discrepancy? Would I be advised to do one side, then start the car and pump the brakes, shut down and do the other side or can I do both sides before starting/pumping?
I'm reasonably adept at this sort of thing and will be doing this work with some friends who have vast experience with this sort of thing. I'm just looking to expand my own knowledge base a bit... and I really don't want to screw anything up as I like being able to stop without running into things.
Join Date: Nov 2006
Location: Wake Forest, North Carolina
Posts: 1,232
Likes: 0
Received 1 Like
on
1 Post
Re: Need to bleed?
There should be no reason to bleed the brakes if you are just changing the pads. I would STRONGLY suggest having your rotors cut (re-finished). This will provide a clean, non-grooved surface for your new pads resulting in no squeaking or pulsations and longer pad life..
Re: Need to bleed?
No need to bleed. You might find when you are all done with all 4 corners that when you remove the cover to the master cylinder some brake fluid will overflow. The main reason for this is because when you compress the pistons on the calipers it pushes some brake fluid back through the lines to the master cylinder. In the past on other vehicles I will use a clean paper towel to absorb the excess brake fluid from the master cylinder to get it to the appropriate level. I am basing this all on brake jobs on other cars and not my Crossfire.
The following users liked this post:
04Lonhorn (06-19-2022)
Re: Need to bleed?
Originally Posted by Mike-in-Orange
4,687 miles... haven't checked the brake fluid but with that low mileage it had better look pretty darn good!!
Join Date: Jun 2006
Location: San Mateo, CA, USA, Earth, Sol, Milkyway
Age: 55
Posts: 1,943
Likes: 0
Received 17 Likes
on
11 Posts
Re: Need to bleed?
When you change out the pads, pressing the cylinders back into the calipers slightly (spreading the caliper) will make room for the new pads. If you support the calipers with a small plastic bucket or double walled cardboard box or something similar and do NOT disconnect the lines there is no need to bleed the brakes afterward.
Once you have all the pads on and BEFORE you check the fluid level... get in the car and pump the brakes a few times with the car off. This will tighten up the pistons and move some fluid out of the master cylinder and reservoir so you don't have the spill issue when you check it.
No need to turn or resurface the rotors with that low of milage. If they sqeal for a while I will be suprised. If you put the appropriate amount of anti-squeal on the pads, then it's just the new pads 'bedding in' on the rotors. This means they are wearing out the old pad material that was embedded into the metal of the rotor itself. It can happen if the pad material is different enough, but as stated, it shouldn't last long.
Cheers!
Once you have all the pads on and BEFORE you check the fluid level... get in the car and pump the brakes a few times with the car off. This will tighten up the pistons and move some fluid out of the master cylinder and reservoir so you don't have the spill issue when you check it.
No need to turn or resurface the rotors with that low of milage. If they sqeal for a while I will be suprised. If you put the appropriate amount of anti-squeal on the pads, then it's just the new pads 'bedding in' on the rotors. This means they are wearing out the old pad material that was embedded into the metal of the rotor itself. It can happen if the pad material is different enough, but as stated, it shouldn't last long.
Cheers!
Last edited by MMZ_TimeLord; 02-26-2008 at 03:40 PM.
Re: Need to bleed?
Originally Posted by Mike-in-Orange
4,687 miles..... haven't checked the brake fluid but with that low mileage it had better look pretty darn good!!
It's a good idea to flush your brake system out every once in awhile to rid the system of contaminents (dirt and moisture).
That's why I was wondering how many miles you had on your car but with only 4,600 miles there should be no need to bleed the brakes on a pad swap.
Re: Need to bleed?
Gee, that was easy.
Thought I should update all of you on this since you gave me such great advice.
Pads installed on all four corners over the weekend - firm pedal, no squeaking, stopping power seems equal to before. Today I pulled all four wheels off again and gave them the royal spa treatment so they are clean as a whistle inside and out. I didn't have an opportunity to do this while changing pads or I would have. Turns out changing the pads was maybe a wee bit easier than cleaning the wheels!!
Thanks again for all the help.
Thought I should update all of you on this since you gave me such great advice.
Pads installed on all four corners over the weekend - firm pedal, no squeaking, stopping power seems equal to before. Today I pulled all four wheels off again and gave them the royal spa treatment so they are clean as a whistle inside and out. I didn't have an opportunity to do this while changing pads or I would have. Turns out changing the pads was maybe a wee bit easier than cleaning the wheels!!
Thanks again for all the help.
Join Date: Jul 2007
Location: baltimore muuurland
Age: 41
Posts: 638
Likes: 0
Received 3 Likes
on
3 Posts
Thread
Thread Starter
Forum
Replies
Last Post
Beeker
Troubleshooting & Technical Questions & Modifications
3
07-20-2015 03:46 PM
PNA
Wheels, Brakes, Tires and Suspension
22
04-01-2015 06:43 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)