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Bolt on head for 250 crossflow 

 

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 Post subject: Bolt on head for 250 crossflow
Posted: Sat Jan 14, 2006 6:02 pm 
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hey guys im bolting on head to my xf motor with touque wrench and they are 68, 85 and 92 like said on the sheet but the problem is are the bolts ment to snap when only doing 85 on bolt 3 by the instructions

LOL WTF do i do now

Man im not getting far on this car

 

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Posted: Sat Jan 14, 2006 6:06 pm 
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Not sure, but I dont think they are supposed to snap.

Did you use new head bolts?

Did you get NM and ft-lb mixed up?

 

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Posted: Sat Jan 14, 2006 6:28 pm 
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why are there different numbers for different bolts? :? i thought the head would have wanted to be torqued down evenally.

and no their not meant to snap ;)

as above, did you use new bolts?

 

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Posted: Sat Jan 14, 2006 6:35 pm 
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Gaz wrote:
why are there different numbers for different bolts? :? i thought the head would have wanted to be torqued down evenally.


Because you don't torque them all the way to start with, your torque in stages, so the first number is the first stage (torque all bolts to this in sequence), second number torque them all further to this and third torque them all to that to finish it off.
I'd say if you used second hand headbolts there's your problem, or if you used new ones the quality was crud!

 

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Posted: Sun Jan 15, 2006 6:32 pm 
Getting Side Ways
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Arrr theres where i went wrong i use original ones didn't know u had to replace them i only got to my darn second stage of touque on bolt 3 on the instructions

 

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