Menu toggle

Operation Brake Overhaul - 4S

dommorton

PCGB Member
Member
As some of you can vouch, my car is a nice tidy example. It's a shiny low miles 4S, which has had lots of TLC to keep it on top. But despite this, there is one thing that I have never been happy with. The tired appearance of the brakes.

Look even worse with the wheels off. Ergh [X(]
A64D45AC-A14A-480F-908D-4632B168C5DF_zpsupg3wjdx.jpg


8B846802-11D1-4BD7-A2D5-57042E4C5C8B_zpsrqw319zl.jpg


The old brakes still had lots of meat on them, so I put this one off for as long as I was mentally able. But recently I snapped and took action. They had to be fully overhauled! and per my past track record, I knew I wouldn't stand for any of the old looking parts being reused. This despite many still being in good order and serviceable.

So I took the plunge and ordered up the following:
New Discs x 4
New Pads Front and Rear
Pad Shims
Wear Sensors
Stainless Wire Retainer Clips x 4
Back Plates x 4
Back Plate Bolts
Caliper Bolts (not cheap!)

I very nearly went for brand new calipers too. That was until I got news Porsche has put up prices on these over 100% in recent times [&o]

Unfortunately the rated Thomas was not available. So instead I set about trying to find a good company to fully rework my Calipers and make them as new, or better still better than new! The outfit I went for had good reviews, gave a detailed and prompt quotation, and had lots of high res pics of their previous jobs. Impressive, you're hired!

The 4S has the high pressure braking system per the Turbo, so you have to be a little more cautious than usual when setting about this type of work. Very basically, whatever you do don't power up the ignition. Doing so will start the brake assistance pump, so if you have any disconnected lines there will be a mess!

Following advice from a 993 guru with more time served than I. I removed the old pads and depressed the brake pedal about 2 inches. I then wedged the pedal in position so as to lock the fluid in the lines. Thus stopping much loss with the Calipers removed.

Official Porsche Tool employed
9C5A0C8B-6576-47ED-B6FE-B41C5C39F98E_zpsm9fpr3yj.jpg


So off came the Calipers
5F1C688A-382D-4E1E-A038-8F06A841B602_zps1ntqnhuw.jpg


Caliper Plates not quite lifting yet, but getting there
4932C3CD-6A6B-45D2-A4D5-06C3D6EB83EF_zpsynm5cjdq.jpg


My Impact Screwdriver came in very handy to undo the disc mounting screws
71CD0697-D954-40EC-93EC-68D1068567E2_zpseqeovfik.jpg


Then the rest of the manky old parts
4AAEB064-7BD0-4B8E-9F75-5F4E23C39126_zps9mmjuk6i.jpg


Felt a bit daft junking these, so they went to a good mate to be re-purposed
E395D0B8-70A0-4F23-8B97-06006388D33C_zpshlrydvms.jpg


So my Calipers went off to the 'Specialist' who for the sake of this thread, and ongoing discussions shall remain nameless. There they stayed for longer than expected, only to return to me in a less than satisfactory state [>:]

So, back they went! and in the meantime I prepared everything else ready for their safe return.

The grey paint finish applied to the Discs was poor and unlikely to stand the test of time, and I decided I wanted them to look nice for as long as possible. So I ordered up a big can of 693 Aircraft Grey Military Heat Resistant Metal Paint.

I painted the disc bells and the edges with about 6 coats in my dedicated spray booth to the side of the ManCaveâ„¢

87408D1E-99DC-4387-A2C8-0898A0E777A9_zpspzong5bd.jpg


D2ABA858-775F-45B1-AE07-56A131F29FF4_zpsxv8euvfd.jpg


Finished items looking fresh
57B0FE85-5FA7-4F99-9E09-7BC4BE1CF192_zpsc0nnifoi.jpg


Hubs all got a good clean up with a wire brush drill attachment, and the new Back Plates installed all round.

Before
D3FCCFFF-BFB3-4655-B999-34A1E3CD59A6_zpskazz4h3y.jpg


After
08ED07A8-DDE5-4A8C-811A-755C1497957E_zpshyczdqnk.jpg


Hubs and wheel studs lightly coated in OptimolTA per Porsche guidelines. Discs installed torqued down with steel open ended nuts and checked for lateral runout with AP tool. All within 0.02mm of the permissible 0.09mm.

6705070D-160E-4796-AAAC-93F6422A89BF_zpsln6jkibc.jpg


DFFA8596-87CB-4445-BAFD-23A8C6CC7C28_zpszaa5rije.jpg


2F0BFDA7-CA93-4697-9BF3-9096A2C9FBAB_zpslv6tueck.jpg


Then following yet more waiting [&:] my Calipers came back again. This time the finish was very good, with lovely stenciling of the Porsche script. But, I still wasn't satisfied. They had painted with silver Hammerite the pad retaining clips and the Caliper Plates [&:]

I couldn't find the strength to argue anymore, so set about paint stripping and polishing the parts. Hours and many pairs of gloves later they were perfect.

14DE9C2F-3823-4071-879D-0B09B49DDE9A_zpsu95zmafv.jpg


Note: some pics are dark and rubbish, because in the sheer frustration of it all, and with little time spare these days to do anything like this. I pulled a midnight to 2am shift on a school night to rebuild the car.

The tiredness the next day felt like a small cost Vs the reward though, as now finally I had great looking brakes and bar the bleeding, the nightmare and the mounting cost was behind me. Or so I thought....

Upon bleeding, with the help of my good friend and Porsche Specialist Mechanic. We found that 6 of the 8 bleed nipples were weeping fluid. This without any pressure added, and with all the nipples done up tight.

scream.jpg


The 'Specialist' claims to never have had an issue with the parts they supply, and that the nipples given were of equivalent quality and size to the original parts. Now the last part may be true. They weren't made of cheese, as they did take a good snugging up without breaking. But, they leaked around the threads, so something wasn't right.

OPC Swindon to the rescue. They got some genuine parts in very quickly for me. Once compared it was obvious the equivalent parts were not so equivalent.

3BB4D643-4DDB-4E96-81BD-6575BBD4AFA9_zps4avbdchn.jpg


Another £50+ later and all was well.

Lovely fresh brakes all round, and a very smart looking 993 looking almost as good as it would have back in 1998 when it was passed to it's first owner.

The overall cost was a bit of a wallet basher. Of course I saved a lot doing work myself and obtaining parts from very helpful suppliers. But still, not a cheap job by any means.

With the miles I add though, it should last for many years to come.

8C1A80A1-E365-4591-A9EC-75055AFCAE29_zpsmgnreytq.jpg


F6F9C902-2816-4803-A66C-7E8DD8967273_zpsakf0fm0g.jpg


3A49D6F0-709F-411D-8C16-AE84D556F866_zpsfth0mng2.jpg


7614EEFA-6A14-49F2-847D-DD6B9B1BF9C6_zpsezsuzftm.jpg


91F158B9-2D9A-4B86-A214-8ACE4314E9BE_zpskfudlkne.jpg


Now to give them their dues, the 'Specialist' in this tale is clearly capable of great work. They just need to work on their quality control, customer contact, following of explicit instructions and being humble when they have messed up. I won't name them just yet, as I am giving them an opportunity to right some of their wrongs.

If you have any questions or comments about the job I will be happy to hear them.

Operation Brake Overhaul - Completed √

993Perfection_zps06de209a.jpg
 
That was a very informative and comprehensive description. For someone who relies on technicians, I would appreciate knowing what you felt was wrong with the brakes. Was it just appearance ? or was it the actual performance ? If performance of brakes has greatly improved, do you or any other contributor know what sort of costs would be involved at an IPC for what you had done ?

Thank you !

 
I always do the majority of the work required for jobs such as this one myself. My reasons being. I'm able. I can do some 'while I'm in there work' whist at the job in hand. I have a car I can take off the road and a ManCaveâ„¢ to escape to. I get to maintain quality control throughout. Then there's pure economics. No Porsche Specialist in the land could afford to take the time and go to the effort I did on a job like this. If you sent the new discs off to a body shop and had a specialist do all the removal and installation, I expect you'd add about £750 to the cost.

The parts costs are quite staggering too, and vary hugely depending on the source. I was lucky there and had the help of some great suppliers who did me a favour and saved me a packet on the parts cost.

The calipers were working apparently well before. If I'm honest, my reasons for embarking on the job were mostly cosmetic. However, the calipers have benefitted from a detailed bead blast all over. Especially important under the plates where they corrode. New seals throughout. Then interestingly, they did find a very sticky and damaged piston which had to be replaced. This work, whilst costly, was considerably less than getting new calipers from Porsche. I also liked the idea of keeping mine with the car, and being sure the finish was top notch. Something I am told is not a given with new parts.

I can feel a difference when using them. But how much of that is fresh calipers and how much is just the effect of clean moving parts, new discs and new pads, who knows.

Either way I can be sure all is well in the braking department now.
 
Considering your attention to detail and abilities, I'm surprised you didn't renovate the calipers yourself. Seal kits can be bought at about £35 per axle and the paints and stencils about the same. Plus you get to spend the time to get it perfect.

Great photos, well done.
 
Hindsight is a wonderful thing. I'd unlikely to use the same outfit given another chance, but still I would have had to farm out the bead blasting and painting (with a durable finish). All told the hassle and turnaround time would have been about even.


 

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Back
Top