WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
EXHAUST MANIFOLD SPECIFICATIONS
Type
Thread
Description
Tightening Specification
1AZ Exhaust manifold to cylinder head Coat screw connections with CRC copper paste