Front brake lever click

ShakeyBMW · Jun 2, 2019

I recently changed my front brake pads, fitting Brembo scintered pads this time.
To fit them I pushed back the old pads to make space, venting excess fluid throught the bleed nipple.

More recently I noticed the lever was coming right back to the grip so I gave it a good few pumps to stiffen it up (oooerrr!) and held the lever back with a velcro strap overnight a couple of times. This improved things a bit but still not ideal so I decided to bleed them through with some fresh fluid (I did a full bleed including exercising the ABS last autumn) and I did get a few bubbles out of the right caliper but not much.

Again there is improvement so I think I’ll do the full bleed again BUT now I can feel a click through the lever when pulled back half way. I’m wondering if that might be a worn master cylinder seal folding back under pressure :nenau

Anyone else experienced this?

Do I need to overhaul the master cylinder at 27000 miles?

Redmonster · Jun 2, 2019

If you have a gs911 I would do an abs reset

Deleted account 191119001 · Jun 2, 2019

Martin have a quick look at thread below.

https://www.ukgser.com/forums/showt...to-work-after-the-the-pad-change-amp-bleeding

ShakeyBMW · Jun 2, 2019

I do use the “old fashioned” method although I have a line with a spring loaded non-return valve so I don’t have to reach over to close the bleed nipple before I let the lever go.

Deleted account 191119001 · Jun 2, 2019

ShakeyBMW said:
I do use the “old fashioned” method although I have a line with a spring loaded non-return valve so I don’t have to reach over to close the bleed nipple before I let the lever go.

Is the spring loaded line working OK................ :rob

ShakeyBMW · Jun 2, 2019

Ummmm. Probably?

The click was a red herring eliminated with a bit of lube. I think I’ll get a second pair of hands on the job and have the nipple opened and closed. :blast

autogs · Jun 2, 2019

you should not have opened the bleed nipple.you now need to introduce some new fluid and bleed the brake,imo from what you have posted obv

ShakeyBMW · Jun 2, 2019

autogs said:
you should not have opened the bleed nipple.you now need to introduce some new fluid and bleed the brake,imo from what you have posted obv

Presume you mean when I put the new pads in. I wasn't keen on pushing oil back up past the master cylinder seals in the “wrong” direction.

autogs · Jun 2, 2019

ShakeyBMW said:
Presume you mean when I put the new pads in. I wasn't keen on pushing oil back up past the master cylinder seals in the “wrong” direction.

never ever have i opened the bleed nipple when changing pads,and ive done hundreds in my time :rob

ShakeyBMW · Jun 22, 2019

OK folks, this is really starting to bug me.

With a second pair of hands we've bled the front brake to the tune of about a jam jar full and there is no difference.

I have attached the GS-911 and run through the ABS bleed sequence too. Here's what I'm not sure about....... As the GS-911 runs the ABS to purge it, you have to operate the brake lever for 2 seconds at least 3 times. It isn't clear to me whether the bleed nipple should be open at this point but given that we've just completed a manual bleed cycle, mine are closed. Am I being a numpty?

ShakeyBMW · Jun 22, 2019

autogs said:
never ever have i opened the bleed nipple when changing pads,and ive done hundreds in my time

Noted and I'll remember this next time. Thanks.

ShakeyBMW · Jun 25, 2019

ShakeyBMW said:
OK folks, this is really starting to bug me.

With a second pair of hands we've bled the front brake to the tune of about a jam jar full and there is no difference.

I have attached the GS-911 and run through the ABS bleed sequence too. Here's what I'm not sure about....... As the GS-911 runs the ABS to purge it, you have to operate the brake lever for 2 seconds at least 3 times. It isn't clear to me whether the bleed nipple should be open at this point but given that we've just completed a manual bleed cycle, mine are closed. Am I being a numpty?

Thanks to BoxFlyer’s youtube channel I believe The bleed nipples should remain closed during the running of the ABS part of the cycle.

Front brake lever click

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