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Volvo replacement bolts have been smaller, what's up? 850 1995

posted by  Three5bangers on  Fri Apr 13 17:42 CST 2018
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last visit: Thu Jan 17 20:50 CST 2013
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Slow poke me replaced a rear shock , rear bumper support bracket bolts and re-painted the rear muffler hanger. I purchased 2 new rear top shock mount bolts, the long bumper support bracket bolts and a bolt for the rear muffler hanger. These were all difficult to ease out. All the replacements had a smaller bolt head making me thing subsequent removal/replacement will be even more difficult. Flange bolts - does that mean they kind of have a built in washer to spread the load, those flanges were smaller diameter also. Has there been some new standard that allows this , like a DIN standard? I've kind of learned some of the bolt terminology like thread pitch and length but maybe not on the size of that flange. I'd like to abandon this volvo trend and order bolts to be duplicates of what the late 1994 stuff that is on my car.








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    Volvo replacement bolts have been smaller, what's up? 850 1995

    posted by  KlausC on  Sat Apr 14 10:06 CST 2018
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    Where did you buy these bolts? When I did the front struts, I got a bunch of bolts/nuts from FCP that I never used because they were smaller with smaller flanges. The bolts from the dealer cost more, of course, but they were the identical size as the original.

    The smaller flange probably means that they cannot be torqued as much. The top bolts for the rear can be reused, just clean the rust off the tips and lightly oil the threads or use never seize.



    --
    Keeping it running is better than buying new








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      I got them from my local Volvo dealer 850 1995

      posted by  Three5bangers on  Sat Apr 14 22:48 CST 2018
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      I got them from the local volvo dealer - mostly because I often can't figure out the part # for bolts. Now that I have the part # for the rear shock bolts - I can get them from tasca for half my stealer price - but do I want to? I think automotive engineering since 1995 has been aimed at how to reduce half a cent off the cost of each bolt - so now Volvo is selling us (s60 bolts.. is that a newer volvo?) that were rethought in 2004 to just endure the assembly process but will fail on the disassembly process after just 4 years of corrosion exposure. If your FCP bolts were also small - maybe there was a change in the DIN standard or some new EUor standard changed. Of all silly things I follow the stupid expensive porsche 356 and there was a current issue discussing how the bolt heads on all bolts were also reduced in size back around 1960. Guys lament how the old bolts had a 14mm head but the replacement bolts have just had a 13mm head for the last 58 years.








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        These might be better bolts than volvo at 28 cents vs 3.98 850 1995

        posted by  Three5bangers on  Mon Apr 16 21:42 CST 2018
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        https://www.boltdepot.com/Product-Details.aspx?product=17473

        even has a larger head at 13mm vs 12 original and the $3.98 from volvo had a 11 mm head.

        I think I'm on to something.







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