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Old 02-19-2005, 22:33   #1 (permalink)
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mad Au Head Bolts

Hey Guys,
I'm doing a head gasket on my Au and have come to the part of undoing the head bolts. The first bolt i have tried to crack is extremelyu tight. I have snapped 1 socket already and got my brothers impact sockets and now it has started to round the head. I am using a breaker bar. Any ideas on how to get this bolt out.
Cheers Josh
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Old 02-19-2005, 23:24   #2 (permalink)
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Re: Au Head Bolts

Theres no way a single hex impact socket would round a bolt.
Is it the right size & are you sure its a single hex?
Afew engines i have worked on state, 240 lb/ft plus 90 degrees.
Prolly whe the bolts are tight, especially if they are torque to yeild
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Old 02-20-2005, 00:09   #3 (permalink)
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Thumbs up Re: Au Head Bolts

Quote:
Originally Posted by XECLEVO
Hey Guys,
I'm doing a head gasket on my Au and have come to the part of undoing the head bolts. The first bolt i have tried to crack is extremelyu tight. I have snapped 1 socket already and got my brothers impact sockets and now it has started to round the head. I am using a breaker bar. Any ideas on how to get this bolt out.
Cheers Josh
if still stuck you need the "corret" impack socket , just installed an el had this morning and the righ metric socket is a firm fit ...
if all else fails use a brass bar on the bolt head and strike firmly with a 10LB hammer a couple of times , if you are very lucky it should then undo
good luck
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Old 02-20-2005, 01:08   #4 (permalink)
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Re: Au Head Bolts

Just used a impact socket on the bolts and they still rounded the head of another bolt. These buggers are tight. There are a total of 3 bolts that i cannot undo.
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Old 02-20-2005, 15:14   #5 (permalink)
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Re: Au Head Bolts

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Originally Posted by XECLEVO
Just used a impact socket on the bolts and they still rounded the head of another bolt. These buggers are tight. There are a total of 3 bolts that i cannot undo.
As svo347 said, you cannot round a bolt head with an impact socket. Simply not possible. You can however round a bolt head with a 12 point socket.
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Old 02-20-2005, 21:19   #6 (permalink)
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Re: Au Head Bolts

Well i have made it possible as i have only used a single hex head socket.
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Old 02-21-2005, 01:46   #7 (permalink)
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Re: Au Head Bolts

Rang the local head block after my last post and he said to me that the au was renowned for stripping the head bolts. he told me to go and buy some spare 14mm sockets and weld them to the head bolts and then undo them. Well it was a waste of 6 14mm sockets but sure did the trick.

Just got to get the head crack tested and if its no good then Dev 4 here i come. Does anybody know if jim mocks prices on his web page is for a complete head???
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Old 02-21-2005, 04:40   #8 (permalink)
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Re: Au Head Bolts

If you're rounding bolts with an impact socket, it is too big and/or not far enough down on the bolt head. A perfect socket would need to be tapped onto the bolt with a hammer- it'll JUST fit on the end, but ater that will be too tight. Sometimes the outside diameter of the socket can jam on something else preventing it seating on the bolt properly. In this case, it could require careful grinding. Just remember- if they can be put on without shearing the heads off/rounding them, then you should be able to get them off without that happening (and without welding an impact socket to them...) Any sort of binding that occurs could be undone as described above with the brass bar.
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Old 02-21-2005, 12:21   #9 (permalink)
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Re: Au Head Bolts

Hey madmelon, have another look at your sig. You should be more careful with your spelling when referring to fools ;-)
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