Vehicle & Technical > Discovery
Seized caliper bolt desperation
doris:
Hi All
Following my rear wheel bearing's demise over the weekend, I have been attempting to strip the hub down whilst waiting for the parts, but I am having terrible trouble with the bolts holding the caliper on. I have managed to shift one, but the other is seized solid and now I have rounded of the stupid star pattern bolt!! Judging by the state of the calipers, I think it must be 15 years old and never been off since the car was built.
Any ideas?? Suggestions? Anybody local with the correct knowledge/tools willing to swap a rescue for beer or cash?
Damon
clbarclay:
star pattern?
As in 12 point rather than 6 point, given you have trwice the contact area as standard a normal 6 point should have corroded round either worse or sooner.
Standard common cheap 'easy outs' are a mugs game.
These sort of extractors should be a lot better (remeber the phrase you get what you pay for)
http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=64882&group_ID=16597&store=uk&dir=catalog
doris:
Thanks Chris
I thought that 12 point would give more surface area to corrode and less body in the points to withstand corrosion, but I guess you must be right. Either way I am stuffed for the moment.
Looking at your link a thought just struck me.......... are caliper bolts 1/2inch or 13mm?!! I couldn't get a 1/2in on it so I used a 13mm which appeared snug, and worked well on the other bolt. But I guess it could be that the corrosion swelled it out a bit.
How do those extractors work then....... do they bite in using the flutes which are keyed to bite in the opposite direction to the thread?
Damon
clbarclay:
Yeah the grip the outside rathwer than common easy outs which grip the insid of the hole, which mean they work at a lower torque and are less likely to slip or break.
Not sure whether they are metric or imperial, it depends of vintage of the axle as they went on using imperial for some time, but 1/2" is approx 12.7mm.
Wolfie:
Or http://www.machinemart.co.uk/shop/product/details/5-piece-bolt-grip-set
Ultimately probably lower quality than snap on, but they work.
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