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Head bolt quality question 700 1991

posted by  oldyellr on  Mon Dec 29 13:55 CST 2008
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last visit: Fri Oct 24 14:28 CST 2014
[RELATED]

According to the FAQ:

"The head bolts are often overlooked, so I recommend replacing the head bolts when the cylinder head is removed for any reason. The B230 engine has torque-to-yield bolts (TTY) and the B5254 engine also uses them. TTY bolts are essentially stretch bolts that produce more clamping force on the cylinder head for proper sealing of the head gasket."

However, I've reused TTY bolts when replacing a head on a V6 Cavalier with no ill effects because I didn't know any better. (They had to be torqued to a certain value, plus 90°). Using new bolts would have doubled the cost of the job.






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