replacing cylinder head bolts on M30 engine

[javlin 0]

Hi all, we are at the point of putting the cylinder head back on after planing head new rings etc. The Bentley manual says to use new head bolts. How critical is this? Has anyone reused the old bolts and not had any problems? thanks.

[*Glenn* 854]

Always use new bolts

[Silver Fox 43]

Thought that was with stretch bolts Glenn? The M30 has standard bolts, not stretch.

[Sick Puppy 1]

Nah, what Glenn says- where head bolts are concerned, use new ones - period.

[Guest FrantiC]

Torque to yield bolts shouldn't ever be used twice.. They are the ones you tighten to a torque spec, then angle turn to yield torque.

Standard headbolts CAN be used again, But I wouldn't ever use the same headbolts twice...

[User Name 19]

I agree with above use new head bolts

ive used bolts a 2nd time on the m30 lead to a warped head and they dont lock as well

[euroitalian 62]

If you haven't sorted this yet I have these H/Bolt sets new at special price $50.00 + GST.