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m106 exhaust manifold to head sealing
Posted: Nov 28, 2017 3:13 AM
by Nebraska_e28
Working on a new project. I plan to install an m106 exhaust manifold to a different m106 head that is not the original one it was mated to. Since these are partially sealed by copper rings, what are the odds a different manifold may leak slightly? My thinking here is that all manifold/head combos may wear slightly different hence swapping may cause a minor sealing issue.
Re: m106 exhaust manifold to head sealing
Posted: Nov 28, 2017 10:24 AM
by BMW Performance
put new copper rings in it and you will be fine.
Re: m106 exhaust manifold to head sealing
Posted: Dec 08, 2017 10:52 AM
by Hgordon
I'm doing the same thing except installing the m106 manifold on an m30b34 head. The copper rings appear to be $40 a piece which seems a little ridiculous, is there a non-factory solution?
Re: m106 exhaust manifold to head sealing
Posted: Dec 08, 2017 10:57 AM
by Nebraska_e28
Re: m106 exhaust manifold to head sealing
Posted: Dec 08, 2017 2:25 PM
by Hgordon
Stove sealant eh? I guess it's worth a shot if the rings aren't available anymore.
Re: m106 exhaust manifold to head sealing
Posted: Dec 08, 2017 3:10 PM
by Nebraska_e28
On my other 745, I used a little wd40 on mating surface of the head & manifold prior to install. Zero leaks. But this is the same head/manifold combo that were married at the factory.