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Jam911
Barcelona


Joined: 31 Oct 2010
Posts: 1472



PostPosted: Fri Apr 12, 2019 7:40 am    Post subject: Bleeding Brakes - How Tight Bleed Nipples? Reply with quote

I am replacing my brake fluid tomorrow and would like to know how tight the bleed nipples should be done up?

Thanks
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6838
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Fri Apr 12, 2019 7:53 am    Post subject: Reply with quote

8-12Nm on the 996, I doubt the 997 is much different. I must admit I have never used a torque wrench on one.

MC
 
  
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maldren
Suzuka


Joined: 07 Oct 2016
Posts: 1028



PostPosted: Fri Apr 12, 2019 8:07 am    Post subject: Re: Bleeding Brakes - How Tight Bleed Nipples? Reply with quote

Jam911 wrote:
I am replacing my brake fluid tomorrow and would like to know how tight the bleed nipples should be done up?

Thanks


The first challenge may well be how tight they are to undo, they corrode. Get some stainless replacements.
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wasz
Sepang


Joined: 28 Dec 2012
Posts: 2902


1999 Porsche 996 Carrera 2

PostPosted: Fri Apr 12, 2019 8:28 am    Post subject: Reply with quote

Tight enough but not too tight.

Best tip for undoing the nipples is to use the T bar from your socket set to apply an even rotating torque to the nipple. Don't swing on a spanner.

If it feels stuck don't just force it, they snap for fun.
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ragpicker
Estoril


Joined: 14 Apr 2013
Posts: 3948
Location: North East England


PostPosted: Fri Apr 12, 2019 8:59 am    Post subject: Reply with quote

They often need heat to loosen them, but be careful as you can scorch the paint on your callipers with the blow torch. Fortunately I've never had one snap using heat but I have had some scorched calliper paint Grin
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MisterCorn
Long Beach


Joined: 08 Jan 2011
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Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Fri Apr 12, 2019 9:09 am    Post subject: Reply with quote

wasz wrote:
Tight enough but not too tight.


My understanding is that this is the correct torque for all nuts Smile

As mentioned, getting them out might be the hard part.

MC
 
  
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craig15
Newbie


Joined: 10 Sep 2018
Posts: 12



PostPosted: Fri Apr 12, 2019 11:42 am    Post subject: Reply with quote

When I'm about to open bleed nipples I repeadly tap them end on with a hammer before attempting to unscrew them. The idea is to break any seal caused by corrosion.

Craig
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6295
Location: Brighton


PostPosted: Fri Apr 12, 2019 7:47 pm    Post subject: Reply with quote

craig15 wrote:
When I'm about to open bleed nipples I repeatedly tap them end on with a hammer before attempting to unscrew them. The idea is to break any seal caused by corrosion.

Craig


That's what i do .. but i use my hand .. i'm afraid after many years doing this its not far off being a hammer on my palm but you get a bit more feeling for it .. you can tell if something is going to come undone basically so you have a choice .

If something is pretty tight but im getting it out regardless then i use a socket / ratchet and a 3/8ths at that ... then i pray .

i just tighten them up .. torque settings are all very well when they are new .. add in some corrosion to the base or the threads and you need a little bit more .. or replace and clean the threads ... new nipples are a pretty good way forward and one i would recommend .
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