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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-29-2016, 10:51 PM   #1
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Join Date: May 2016
Location: Orange County, CA
Posts: 34
My Ride: 2001 E46, M54 (330i)
Question on separating Exhaust manifold from Cylinder head

Fellow Fanatics,
Planning on removing a cylinder head off an M54 with 203K. Before this can happen, I know the exhaust manifold (catalytic converter exhaust pipes where pre-cat O2 sensors are located) will need to be freed from the cylinder head to remove the head from the block.

Is it only 24 self-locking M7 nuts attaching the exhaust manifold to the cylinder head or are there bolt studs to remove as well?

Does anyone out there know if it is possible to detach the cylinder head from the exhaust manifolds without lifting the engine?

Any expertise is greatly appreciated!

. . . Just Querious

thx guys n' gals
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Old 05-31-2016, 03:23 PM   #2
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Join Date: Sep 2012
Location: iowa
Posts: 95
My Ride: 05 330 ZHP
Just the nuts but the studs more than likely will come out when you go to loosen the nuts. I think I had all but two studs back out when I was swapping manifolds.
e36 325is track car in the making, e34 m5
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