head bolt HELL help needed

[fostersice]

so i got the bit i needed to remove the head bolts from the cosworth head

 

i gone though the way i needed to undo the bolts and have fund two bolts the are rounded off

 

these are0 the star type head bolts

 

does anyone have a tool to remove the bolts

 

 

or is it a case of drilling the tops off then try and remove the studs once the head it off

 

 

HELP PLEASE

[james1700]

i have a set of sockets at work that have a slight reverse thread in them. basically you hammer the socket on and as your turn it grips the bolt and will spin it out

 

i think these are avaliable from the likes of screw fix and machine mart not snap on etc but they will be good enough for the job you need to do

 

james

[james1700]

like these

 

http://cgi.ebay.co.uk/IRWIN-BOLT-GRIP-5 ... 7C294%3A50

 

im sure machine mart do them and will be open in the morning

[lee 1]

Don't think they will work on a head bolt could be wrong though.

 

I would just drill the head off the rounded ones once the tension is off them you will probably find you can undo them by hand.

[Fishtailparka]

If you drill the heads off you will then be able to get the head off.

The ones still in there will be sticking out of the block enough to get some grips on them. As said, they will probably come out very easily once you can get at them.

[Seals2]

i use an extractor kit when this happens all u need to do is use the biggest bit in the kit. the way it works is u drill the centre of the bolt down about 15mm the insert theses bit and they grip as u undo the bolt.

 

these are them:

 

http://cgi.ebay.co.uk/5PCE-DAMAGED-BOLT ... 1|294%3A50

[Fishtailparka]

Whenever i use them they always seem to snap. Then you are completely fecked as they are made out of stuff that is even harder than dried Weetabix. Impossible to drill out after that.

[james1700]

only problem with an easy out is if they snap you have no hope of drilling it out.

 

thos sockets will do the job no problem

[Seals2]

ive neva snap the 9mm one on a head bolt or when getting the rest of a snapped spark plug.