How to resurface an Aluminum Head For a MLS head gasket.



I use a Comec Auto I 1000 High Speed Milling Machine with CBN insert for Cast Iron OR a PCD Insert for Aluminum Heads
This machine is double adjustable, I can adjust the spindle speed and the table travel speed to achieve the surface finish that is required.
http://www.joebakerequipsales.com/AutoI1000.htm


The first thing to do is check the valve cover surface for any burrs and remove them.

Next is to mount the head in the machine and check the level of the head in both directions.



Then the other way, this head was not out that bad from the last time it was milled.



I did a “getting to know you” pass of .002 to see how square the head was. This was done on a faster setting.
Notice the upper and left side of the head is dull, this is a low spot. The head was not index properly and did not maintain a proper “square” to the valve cover surface.



I made another cut of .003, I sped up the cutter, and slowed the table speed.

This is the end result.



Another different view.



Now with a proper surface, and the head re-squared, The customer will have no issues with a MLS gasket sealing, and also having a closer to equal combustion chamber size.

 

Dale, this is really beautiful stuff you're doing. I'm gonna have to compile it all into a sticky at some point.

 

Oh, I still have a few more to post, just been dropping one a day.

I have some I will be doing for the 1.8l in the comming week.

 

+ props for you.

 

Yeah... I wish you were a little closer, I've got a vvt motor that could use a lookover before it gets new rods (maybe more)

 

Thank you very much for posting these great machine work "how to's". It helps me understand motors more. <3

 

Fae... That is the point of them!

Hope they help you loose the "nickname" you have around here!