Hey people,

 

If i change the front calipers, discs and pads..... do i need to bleed the whole system, or the four brake calipers, or just the front calipers?

 

Cheerz,

 

Al.

I would recommend doing the whole system. Brake fluid is hygroscopic, and should be changed every 2 years under normal conditions.

 

Fast road or track use would be more often.

 

Also, the as pedal feel degrades over time, you probably won't be aware of how soggy your brakes actually feel right now, until you go ahead and flush and bleed your system.

Hey people,

 

If i change the front calipers, discs and pads..... do i need to bleed the whole system, or the four brake calipers, or just the front calipers?

 

Cheerz,

 

Al.

 

Hi im in the prosses of doing mine to,dont forget to put up some pics.:rockon:

going to be changing my front calipers and disc to something bigger! so any info would be great.

 

dan.:thumbup1:

I can only assume that if the front calipers are removed, then that is only the bleed point/issue. I may be wrong, but hey.

 

Al.

I always thought the bleeding sequence was starting with furthest from the reservoir (left rear) ending with nearest the reservoir (right front), but i found this.....

 

7. One person pumps the brake pedal, then holds. The other opens & closes the nipple using a 10mm wrench with the bleeding hose attached to the nipple (8.). Repeat this 3-4 times each corner until the fluid runs clean & has NO bubbles in it. Then go to the next caliper in order. Left rear, right front, left front, right rear, ABS actuator front, ABS actuator rear. Repeat this order until all four corners are clean & air free. Even the tiniest bubble will harm performance, as it will expand when heated. The ABS actuator is under the plastic hump behind the passenger seat. The ABS actuator on 94+ (9.) doesn't have bleed nipples, so I'm not sure how that works out. I bled the brakes on my '95 for a while until the 'gurgling' noise went away from the ABS actuator while bleeding it. '90-'93 have the nipples (10.).

 

Got this from here...http://www.300zx.org.uk/tech_18.htm

 

I am a little confused now, can anyone through some light on this for me.

 

Cheerz,

 

Al.

ye i can,what you do is start at the furthest away from the master cylinder then do oppiste corners repeat the process as many times as needed untill there`s no air in the system what so ever.also the use of a pipe with one way valve is probally better than relying on someone else.if your still in doubt consult a brake technician at your local ats or similar.what calipers are you upgrading too?

If just working an any single caliper, lock off the flex hose by means of a hose clamp, then the only air that needs removing is from the hose clamp to the new caliper.

Bleed each one as it is changed to reduce any issues, also when bleeding do not press the brake pedal fully to the floor as this can sometimes pop the master cylinder seals as they get forced to a part of the cylinder they do not normally go to.

 

If you have braided hose so cannot clamp off the flex pipes then a different method is required, first with the old caliper in place crack the pipe union at the caliper, then nip it again slightly. Now remove the caliper fully and tie up out of the way with cord or a tie wrap. Now fully fit the new caliper and pads etc. open the brake master resevoir lid and stretch some cling film over the top and carefully replace the lid with out tearing the cling film. Now work quickly to undo the flex hose from the old caliper and connect it to the new one, the cling film will reduce the amount of fluid flow from the undone hose as air cannot enter to let the fluid out.Once all done and tightened up, remove the cling film and bleed that particular caliper, will be easy as only a few pedal pushes will be required.

 

Remember when doing the next caliper to fit a new piece of cling film to the master cylinder and repeat the process.

 

Hope that helps and good luck.

 

Jeff TT

Thanks guyz, i will be changing my front brakes in 2-4 weeks and will let you know the outcome.

 

Al.

How did you get on!