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| D2 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc. |
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#1
20th December 2011, 06:36 PM
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Undoing rusted brake pipe flare nut.
About a week ago I replaced all brake discs and pads on m8tes A8 getting ready for MOT. Doing that noticed that rear brake hoses does not look too good with cracks in outer layer and wiggling around changing discs and pads did not make them any better if you know what I mean. So we ordered new hoses as well.
Today I set to replace hose and got stuck on the first one. Flare nut from the pipe had a lot of rust on it and after cleaning up size measured 10.7mm down from original 11mm. Quick try with 11mm flare nut spanner showed that it will go over edges so I grind out 10mm regular spanner to bigger size and forced it on the nut but its rusted pretty solid and would not budge, feels like it will go over edges. Penetrating oils did not help. I was not to keen using blow torch in such a close proximity to fuel tank and hoses and paintwork. Not seeing much of a choice I made a heatshield from thin aluminium sheet to protect paintwork and fuel hoses and attacked with blow torch. Being cautious I probably did not heat it enough and after heating with following spray of Loctite Freeze&release still not moving. So I wrapped it in paper towel soaked in penetrating oil and left it overnight. I have not gone over edges of nut yet but it looks like it is past the point where it can be undone with regular spanner so I will either attack it with vice grips or grind out 10mm flare nut spanner to bigger size and force on the nut to try and undo it tomorrow. If that fails I will have to cut the pipe and replace part of it but there is not much length accessible to work with. Any body have any suggestions?
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure 
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#2
20th December 2011, 07:27 PM
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use a nut splitter to split away the nut?
http://www.toollineuk.com/product.ph...oogle/sn/10913
__________________
Confidence is the feeling you have before you know better . . . .  Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble  Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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#3
20th December 2011, 08:26 PM
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Would still need to cut the pipe as I cannot just slip new nut on. So would need to cut the flare off and make a new one after putting new nut on but my flaring tool is the cheap version not suitable for stock steel pipes, will only do copper pipes. So need to cut stock pipe shorter and use compression fitting to join to copper pipe.
PS. I could not get it on the nut anyway because the pipe is in the way and it is attached to body and its male nut so half of it is screwed in the hose not accessible.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure Last edited by ainarssems; 20th December 2011 at 08:33 PM.
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#4
21st December 2011, 04:48 PM
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After soaking overnight it came off quite easily with vice grips. That should be all sorted now. MOT is booked for Friday.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure
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#5
21st December 2011, 06:14 PM
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thank god!!
__________________
Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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