Author Topic: exhaust manifold studs/bolts  (Read 2688 times)

rfbehn

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exhaust manifold studs/bolts
« on: October 17, 2010, 11:34:53 PM »
What are your thoughts on replacing the exhaust manifold studs with grade 8 bolts.

DesktopDave

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exhaust manifold studs/bolts
« Reply #1 on: October 18, 2010, 07:28:07 AM »
I'd stick with the studs.  They're easier to get off later and they're not as vulnerable to heat cycling.  Studs are generally far stronger than bolts just due to being in tension - they don't get twisted by the torque as much as a bolt does.
'08 Karmesinrot 128i 6MT
'86 Zinnoberrot 635CSi (M30B32/G265/3.46 torsen LSD)

Sold: '97 Montrealblau 318iS, '91 Brilliantrot 318i, '91 Brilliantrot 318iS