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M10 Head Bolt Tightening Procedure


NullZwei
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I seem to remember reading something a while back about an updated procedure for torqueing the M10 head bolts but of course I can't find it if such a thread exists.  Is there an updated procedure or is the three step process outlined in the factory service manual still valid?  If the three step process is still appropriate, what do the engine experts out there recommend for the three torque values and is it a good idea to wait between the three stages to let things settle out?  Thanks in advance for your assistance.

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Search CD's posts- he found the factory description.

 

The torque- angle version, I've found, worked better on race motors.

 

On street engines, I don't think it matters so much.

 

If there are instructions packaged with your head gasket, follow them-

and use a light coating of engine oil on the threads.

 

What I've found.

 

t

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I found one of CDs posts re: Torquing head bolts but it appeared to apply primarily to the M30 engine.  There was some mention of angle torquing the bolts which appears to require special tool(s) but I didn't  think that process was applicable to the M10.  Is this the post you were referring to or is there another one more specific to the M10? 

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BMW cylinder head torque procedure.pdf

Search CD's posts- he found the factory description.

 

The torque- angle version, I've found, worked better on race motors.

 

On street engines, I don't think it matters so much.

 

If there are instructions packaged with your head gasket, follow them-

and use a light coating of engine oil on the threads.

 

What I've found.

 

t

Attached CD's psot here. Used the procedure to fasten cyclinder head and no issue. Procedure applies for both street and race engine.

 

Lisle 28100 Torque Angle Meter link;

http://www.amazon.com/Lisle-28100-Torque-Angle-Meter/dp/B0002STSW6

 

 

 

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