how important is milling the head

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Oct 27, 2005, 05:46 AM

#16

Az3ar

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same issue here. I will be doing mine in DEC

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Oct 27, 2005, 06:13 AM

#17

kmcconn9

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Quote:

Originally Posted by warp9

This really goes without asking...Its a MUST.

exactly /\ +1

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May 28, 2007, 05:05 PM

#18

jkim2001

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Quote:

Originally Posted by EvilDylan

found the specs jack was talking about.

"3. Check the cylinder head gasket surface for flatness by using
a straight edge and feeler gauge.
Standard value: 0.05 mm (0.0020 inch)
Limit: 0.2 mm (0.008 inch)
4. If flatness exceeds the specified limit, grind the gasket
surface to specification.
Grinding limit: *0.2 mm (0.008 inch)
*Includes/combined with cylinder block grinding
Cylinder head height (Specification when new):
131.9 − 132.1 mm (5.193 − 5.201 inches)"

Sorry to bring up an old thread. But what is the maximum (in mm) you can remove from the cylinder head? I brought up this questions recently in the Evo engine forums.

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May 28, 2007, 07:14 PM

#19

kjewer1

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I seem to remember it being 8 thousanths, and the spec you quoted seems to indicate that as well ("grinding limit .2mm/.008"") I've gone further, but you start to mess up the tbelt geometry, among other risks.