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Old 09-12-2020, 06:37 PM   #1
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Started the O2 sensor swaps. I'm doing all 4. They are seized in there pretty good. So ima gonna let them soak on PB Blaster overnight. The garage smells of persuasion and progress

Yes, I got the O2 sensors removal socket. Anyone got any other tips?
The O2 sensor socket may flare out and round out the sensor if the sensor is really stuck. Cut the wires and use a deep-well socket or a 7/8" box wrench, if you have room. Use the O2 sensor socket when you install the new ones.

An impact helps or tap the wrench with a hammer to shock the threads. For extremely stubborn one use a torch to heat them up.

Use COPPER anti-seize on the new ones not silver.

Good luck.
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Last edited by piper6909; 09-12-2020 at 06:46 PM.
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Old 09-13-2020, 10:04 AM   #2
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Inspected the my 2001 Boxster 2.7 after a good track day and found out that front brake calipers shows 'some' wear and needs attention.

Both images shows some concern on the brake piston boot... Circled the issue location with red.

What is opinion here, can I repair the brake pistons with new boots (and maybe brake pistons if needed to) or is there bigger issue to deal with (like machining work etc)?

I'd like to manage to keep these calipers if the repair is rather simple, but if there is larger issue to deal, I'll try to find used S-model brake calipers to replace these with.



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Old 09-13-2020, 01:29 PM   #3
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Quote:
Originally Posted by pilot4fn View Post
Inspected the my 2001 Boxster 2.7 after a good track day and found out that front brake calipers shows 'some' wear and needs attention.

Both images shows some concern on the brake piston boot... Circled the issue location with red.

What is opinion here, can I repair the brake pistons with new boots (and maybe brake pistons if needed to) or is there bigger issue to deal with (like machining work etc)?

I'd like to manage to keep these calipers if the repair is rather simple, but if there is larger issue to deal, I'll try to find used S-model brake calipers to replace these with.

I've tried re boring calipers, master, and slave cylinders... never really had much luck. they always seem to weep when I'm done. I havent even attempted to rebuild any in years, just get a new one.

Looks like you don't need any re-boring or replacement of pistons, just some boots. Thats easy, just buy some boots and put them on with a hook and pick. You could find Porsche parts but I'm sure this is not the only car to use these brakes (hint).
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Old 09-13-2020, 04:46 PM   #4
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I rebuilt my calipers. New seals and boots from Porsche (they were cheap). It wasnt difficult and have not had issues since. But I have not done track stuff with it. Just spirited driving. At that time I had 170k kms on the Odometer.

I needed to replace brake fluid anyways (had a close call with old fluid!). So that precipitated into a caliper rebuild just to be sure I covered all the bases. Try that 1st before you replace calipers etc. Good luck!
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Last edited by Zzorro; 09-13-2020 at 07:35 PM.
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Old 09-13-2020, 08:18 PM   #5
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I've tried re boring calipers, master, and slave cylinders... never really had much luck. they always seem to weep when I'm done. I havent even attempted to rebuild any in years, just get a new one.

Looks like you don't need any re-boring or replacement of pistons, just some boots. Thats easy, just buy some boots and put them on with a hook and pick. You could find Porsche parts but I'm sure this is not the only car to use these brakes (hint).
Quote:
Originally Posted by Zzorro View Post
I rebuilt my calipers. New seals and boots from Porsche (they were cheap). It wasnt difficult and have not had issues since. But I have not done track stuff with it. Just spirited driving. At that time I had 170k kms on the Odometer.

I needed to replace brake fluid anyways (had a close call with old fluid!). So that precipitated into a caliper rebuild just to be sure I covered all the bases. Try that 1st before you replace calipers etc. Good luck!
Thank you both for a good advice.
I'll try to avoid the re-boring these as well (some 30 years ago have done it and it was not so good result as I hoped for...).
Current plan is to paint the calipers, flush the brake fluid, swap the new seals and boots during this upcoming winter the latest.
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Old 09-14-2020, 03:03 AM   #6
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Thank you both for a good advice.
I'll try to avoid the re-boring these as well (some 30 years ago have done it and it was not so good result as I hoped for...).
Current plan is to paint the calipers, flush the brake fluid, swap the new seals and boots during this upcoming winter the latest.
You'll know better once you're in there if new calipers are needed. If no water has migrated into the cylinder and there's not rust or pitting and it cleans up well, new seals and boots will be all you need.

You may have a little rust and pitting along the outer edge (outside of where the seal rides) and you'll still be ok. Just clean it off real good so you won't damage the new seal when you insert it.
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Old 09-14-2020, 08:40 AM   #7
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You'll know better once you're in there if new calipers are needed. If no water has migrated into the cylinder and there's not rust or pitting and it cleans up well, new seals and boots will be all you need.

You may have a little rust and pitting along the outer edge (outside of where the seal rides) and you'll still be ok. Just clean it off real good so you won't damage the new seal when you insert it.
Great, thanks Piper fro detailed heads up. I'll report back when I get to open these after the driving for this season is done or some issues come up to force the car to be placed for sleep for the winter...
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Old 09-16-2020, 01:04 PM   #8
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Painted my center caps, using the DIY on this forum. Looks great ! Took about two hours total, but had to take breaks...These things have lots of small details ! Did gold, red, then black touch-ups with a toothpick. Finished with 4 coats of glossy clear, applied 20 minutes apart.







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Old 10-25-2020, 08:07 AM   #9
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The O2 sensor socket may flare out and round out the sensor if the sensor is really stuck. Cut the wires and use a deep-well socket or a 7/8" box wrench, if you have room. :
Make sure you turn the engine and ignition off if you cut the wires. Or cut them one at a a time. I cut mine with the engine running (I was trying to keep the exhaust as hot as possible after a blowtorch session) and blew up my DME, or at least the circuit that controls that sensor.

Best of luck

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