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D3 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc. |
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#1
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Caliper Carrier Bolt removal
Yes, the dreaded aluminium vs steel corrosion has got one of my carrier bolts almost solid. With a breaker bar and a bit of scaffold tube, I can turn it. Just. The top one came out no bother, the bottom one is binding. Have applied PB Blaster over a few days with no change.
The D3 is my first experience with aluminium parts so I don't want to bugger it up. My next move is going to be boiling water treatment. I can get a blowtorch on the bolt, MAPP gas on a Rothenburger torch, but is this going to cause more harm? I could just leave it, as I can get the disc off as it is. But that doesn't sit right in my head and I plan to keep the car for a long time. I am also wondering what state the pinch bolts are in and if I should be doing some PM on them... Thanks
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March 2009 D3 4E 3.0 V6 QS |
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I seem to remember I had similar issues on my OSF a few years back. Last resort had me using alternating between penetrating oil, blow torch, and brute force. The car nearly won that day.
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2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#3
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Quote:
https://www.audizine.com/forum/showt...1#post11386276
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#4
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Update:
It's out! Having spent the last two weeks alternating between sulking and applying PB Blaster, I plucked up the courage to apply the blow torch. Boiling water did bugger-all and the Blaster didn't make any difference. Thanks for the replies and the links. I was wary about overheating and damaging the alloy suspension leg. I swaddled the rubber bits with wet rags and used a moderate flame to warm the bolt and surrounding alloy. Using a 6 sided socket on a bar, the bolt turned a little easier than before. Little by little, it started to come out. I thought it had sheared at one point, but given the size and strength of the bolt it would take more than me on the end of a short breaker bar. A small file was used to clear the crud of out of the hole on the suspension leg - this had packed itself so tightly around the bolt that none of the penetrating oil had got in. It didn't need a lot of heat, gently does it. On a happier note, the pinch bolt seems reasonably free. I will buy some new ones and replace as a preventative measure. One side almost done. Wonder what the other side will be like...
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March 2009 D3 4E 3.0 V6 QS |
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Hallelujah. From memory my OSF was hard going, and made me question my very existence and each and every choice I’d made in life before that point.
As if nothing had come before, the NSF was plain sailing and took minutes.
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2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#6
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Quote:
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Phantom Black 2008 A8 3.0 TDI SE ASB |
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