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Most motors need new head bolts when you do the head gasket. The bolts are stretch bolts - they are stretched just beyond their elastic limit.
Imagine a little coil spring - pull it and let go, pull it again and let go. You are within the elastic limit limits of the metal and the spring. Pull it real hard and it stretches and doesn't go back - you have exceeded the elastic limit and gone into the plastic limit.
The reason is the bolts can be much thinner and lighter - lighter and thinner means less weight and your motor goes faster.
Don't reuse the old ones - it will end in tears!
What else can I help you with?
Do you need to replace head bolts if doing head job?
Yes, always install new head bolts.
Do you need chang head bolts when changing the head set on a p reg vauxhall astra estate 1.6?
Yes, I recommend you install new head bolts.
Do you need new head bolts every time you re-bolt new 350 heads?
No you do not.
Do you need new head bolts when replacing the head on a 94' Honda Civic?
No i replaced the head gasket on my wifes 1993 Honda civic ex v-tech engine and it runs fine withought new bolts.....
What parts do you need to change a blown head gasket on a 99 vw passat?
A head gasket set and new head bolts.
Can head bolts be reused 2.2 cavalier?
you are suppose to replace head bolts they stretch and head will not torque right. When you buy the new gasket, order new bolts.
Should you buy new head bolts when replacing head gasket?
hi if demaged or croded yes if bolts look new no
Do you have to put new head gasket bolts in?
It is always a good idea to replace the head bolts with new ones and is cheap insurance.
Do you need new head bolts on a 2000 kia 2.0 sportage?
Yes, it is generally recommended to use new head bolts when reassembling the cylinder head on a 2000 Kia Sportage with a 2.0 engine. Head bolts are often torque-to-yield (TTY) fasteners, meaning they stretch during installation and should not be reused. Using new bolts helps ensure proper sealing and prevents issues such as head gasket failure or warping of the cylinder head. Always refer to the manufacturer's specifications for the best practices in your specific situation.
What are the torque specifications for head bolts on a 1993 Chevy Cavalier?
the longer (new bolts) are to torqued to 48lbs and the shorter ones are to be torqued to 45lbs then turn the bolts an additional 90 degrees the bolts need to be replaced with new one because they are streched when you torque them down
Do you have to replace head bolts when you replace head gasket on a 2.2 s iy nfire?
Yes, replace the head bolts with new ones.
What other parts do you need to replace in 1998 Honda Civic when you replace your head Gasket?
You will need the intake and exhaust manifold gaskets. I would also install new head bolts.
