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#11
08-10-2015, 05:08 PM
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Quote:
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• 2001 X5 3.0 - Build Date 10/2000 • 1968 Chevy II Nova • 2002 HD Sportster 1200 Chop 
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#12
08-11-2015, 08:35 AM
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The trick which did my job was the floor jack. Jack the ratchet up on the end, and God knows how much force was on that poor ratchet, but BOOM! It worked!
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01' 3.0i E53 (M54) with 164,000 miles  07' 3.0si E83 (N52) with 134,000 miles  08' 3.0si E70 (N52) with 91,000 miles 
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#13
08-11-2015, 08:56 AM
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Never had to do this so I don't know.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD
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#14
08-11-2015, 04:09 PM
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This link should help. MOTOR Magazine Article | MOTOR Information Systems
I would exhaust all other efforts before cutting the head off the bolt. My experience with drilling out a bolt has not been good largely depending on the hardness and diameter of the bolt. It has been at least a 50/50 chance the first few drill bits will break off making the problem much harder to fix. I have had success with heating the surrounding area (with flame wrench) and cooling the bolt if the bolt was fairly large and when I had an excellent fit on the bolt head coupled with a breaker bar and a big hammer hitting it in both directions. If the bolt head is well rounded I have ground the flats and driven a smaller 6 point socket or box wrench. The very best solution for me has been to keep soaking it with penetrating oil several times a day and let it sit overnight and then use the breaker bar and big hammer method.
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 X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interiorDallas
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#15
08-11-2015, 04:49 PM
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Try soaking it with a mixture of 50%ATF and 50% Acetone.
__________________
2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD
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#16
08-11-2015, 10:37 PM
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This is generic info re Tight Bolt...
1. Rust or Loctite creates tight friction on the threads themselves. In this case, cutting the bolt's head off makes no difference, simply because the threads are bonded together. 2. Bolt tightened too much at factory. In this case, cutting the bolt's head off instantly releases the clamping force, which is basically between the head and the surface that the heads touches. The stud is now free to move. I have had this issue (too tight caliber bolt) in many cars. Once the bolt is removed, it is obvious that there is no rust buildup. So the cause for tight bolt was not rust but rather the impact wrench used at factory that might have been over torqued.
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1998 E39 528i 5sp MT 2006 E53 X5 3.0 6sp MT
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