Bleed brakes on 2005 Boxster 987 (needs computer?)

[magycks]

Hi All,

I have a 2005 Porsche Boxster 987 (Tiptronic S) that needs its brakes bleeding and I've hit a hurdle after discovering that I need to put the car into a 'bleed mode' to do it.

The scenario is that I had a broken metal brake line on the front driver side calliper which was leaking out for a whole week before I fitted the replacement part. After replacing the brake line, I bled all 4 corners in the correct order (both sides of calliper) and topped up the DOT 4 for a considerable period of time until there was no air left in the system. I believe since the car has PSM (Porsche Stability Management aka traction control) I need to get the car into 'bleed mode' to complete the job?

So... question is... does anyone have the tool to put the car in bleed mode (i'm in Wimbledon) / can recommend an inexpensive tool with the functionality / a trick to bleed brakes without 'bleed mode'

Had this suggestion in another thread if anyone has thoughts:

RobXjcoupe said:

Jack up both the rear wheels, get it sitting securely and safely on axle stands. Start up the engine, put into gear so the wheels are now rotating say 10-15mph, dip the clutch and gently press the brakes. The abs light will be on as the front wheels are stationary. Are you using the ezibleed pressure bleed? I would say get it hooked up so when the abs activates it will allow the pressurised fluid into the system. Then fingers crossed you should be able to then bleed the calipers.

TL;DR - brakes were drained of all fluid and can't bleed them without putting car into 'bleed mode'. help needed.

[magycks]

bump - anyone who can help?

[elisered]

Have a look at boxa.net - full of technical types 😀

[skinny]

You only really need to bleed the ABS unit if you get air in it. Leaking from the caliper end shouldn't allow air up into the ABS unit, so you should be able to perform a standard bleed without cycling the valves.
I use a pressure bleeder together with pumping the pedal.
If you still want to bleed your ABS valves, you can just go for a drive (assuming your brakes are ok) and brake over some broken ground, you'll activate the ABS and flush a bit of new fluid through

[magycks]

skinny said:

You only really need to bleed the ABS unit if you get air in it. Leaking from the caliper end shouldn't allow air up into the ABS unit, so you should be able to perform a standard bleed without cycling the valves.
I use a pressure bleeder together with pumping the pedal.
If you still want to bleed your ABS valves, you can just go for a drive (assuming your brakes are ok) and brake over some broken ground, you'll activate the ABS and flush a bit of new fluid through

I think there's air in the PSM (Porsche Stability Management aka traction control) valves since after 90mins of solid manual bleeding the brake pedal isn't firm in the slightest until right at the very bottle of its travel? The reservoir did go completely dry as brake line was left dripping for a week.

Edited by magycks on Tuesday 7th July 00:57

[TV8]

This one might help http://www.boxa.net/forum/topic/86834-how-to-use-a...

[kilarney]

You need to activate the abs possibly but more likely its you bleed procedure.
With no tool you can do it by hammering the brakes on a soft surface like a grass verge and this will do effectively the same thing eventually.
I changed the master cylinder on mine and works fine.,vac bleeders dont work. Pump the pedal to get as much pressure as possible hold it there then vent the nipple. Pedal goes to floor. Close valve rinse and repeat. This should work without activating the abs.

Edited by kilarney on Thursday 9th July 18:35