Snapped Bolt

[bluenosebryan]

while driving my galaxy around i noticed a slight banging when changing gears,lucky for me this happened on my street,pulled up in driveway and on inspection the bottom mount was hanging down so i had a good look and the bolt had snapped inside by about 1cm,so the question is does anyone know how to remove it before i try and might damage the thread or how much will a new one cost from frauds,help would be really apeciated as i feel like pulling my hair out if i had any :rolleyes:

[bluenosebryan]

just an update i managed to get the rest of the bolt out by using a size 3 hss drill bit,i gently drilled three holes about 2mm deep then used the drill to get rid of the bits in between to make a sort of line across the snapped bolt and used a screwdriver and hey presto after a bit of force it came out ,so i still have to wait till tuesday to get a replacement bolt :lol: Edited May 26, 2007 by bluenosebryan

[mumble_bee]

umm.. I'm not really mechanicky..... but I had a similar problem once trying to get some bolt off under the car... I drove it down to my man the mechanic who initially thought of drilling into the bolt.. realised that wasnt happening.. then did a makeshift spanner with some flathead screw drivers...

sorry I dont remember it well.. but I do remember he didnt think it was TOOOO big a deal..and he did get the damn thing out in the end...

[Guest wolfie]

,so i still have to wait till tuesday to get a replacement bolt :lol:

 

no you dont! you go down to B&Q and buy one off the shelf M12X1X(DEPENDING ON THE ENGINE/GEARBOX?) 75mm, 85mm or 88mm..... 85mm auto!

[bluenosebryan]

,so i still have to wait till tuesday to get a replacement bolt :lol:

 

no you dont! you go down to B&Q and buy one off the shelf M12X1X(DEPENDING ON THE ENGINE/GEARBOX?) 75mm, 85mm or 88mm..... 85mm auto!

thanks for that wolfie ,didnt know b&q sold them but going down now to see if i can get one :lol:

[Guest wolfie]

they sell several different lengths at the correct size thread! my last real replacement from VW lasted three months before it failed again :lol: so far the last B&Q special is up to eight months :lol: and B&Q have better opening hour :lol:

[tiny]

You should check what grade the bolts are, metric bolts or set screws should have a grade stamped into or embossed on the head, 4.6, 8.8, 10.9, 12.9 are common designations. The higher the number the greater the tensile strength.

 

Typically Socket cap Screws (allen head) are 12.9, hex head screws commonly go to 10.9 with both 8.8 and 10.9 being considered of high tensile strength.

 

If buying non original bolts, i would be wary of the tensile strength rating, too low the bolt could fail, too high and it could be near impossible to drill out if it does snap.

[Guest wolfie]

very true! have not checked what tensile strength the OE bolt is nor the B&Q specials are? but the B&Q ones seem to last longer than the OE bolts!

[El Dingo]

Maybe a softer bolt yields a bit and doesn't snap? :P

 

Good point, Tiny.

 

Do you remember the story about the Wartburg - when they were first imported into the UK, legend has it that the wheel bolts were manufactured from mild steel, rather than the high-tensile variety... I don't know if this is true, but it would be both hilarious and frightening.