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Transferring parts to a new head


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Hey there,

Just bought a E12 2.0 head on Ebay - seller had it decked and pressure tested, but it comes with no parts - no cam, valves, etc.


I'm going to start transferring the parts off my current head, clean and inspect them, then populate the new head. The parts are coming off of a 76 M10 that just blew it's head gasket.


The seller claims to have lapped the valves, but i'm thinking I will perform that procedure with my own because I suspect they're all slightly different. I understand all of the basic stuff about removal and installation - torquing procedure, surface prep, measurements - but I'm not sure about actually building up the head.


Any tips or things to look out for?

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Keep the rockers with their respective cam lobes.


Have the valves ground, and the seats, too, if that hasn't been done.

You can then lap them together, if you want.  Modern theory

says it's only useful to check fit and margin.   I do it.


Have the valve guides checked- they tend to wear.


Check spring height-  BMW springs are good, but not perfect.


Check ALL tapped holes- much easier to fix now....


More that I've forgotten....



"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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