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K321 Rebuild


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#1 LOW96HB OFFLINE  

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Posted May 09, 2014 - 06:24 AM

I am doing a rebuild on my 140 H3 K321. I am wanting to have the head trued up, shaved, ever how you want to look at it. What is the most I can have shaved off and still be safe? Thanks Scott



#2 KennyP OFFLINE  

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Posted May 09, 2014 - 06:34 AM

I just did a head on a K321 here, post #7. One thing I didn't mention is I put the sandpaper on a piece of glass so it would be a flat surface. Got it trued up very nice.


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#3 LOW96HB OFFLINE  

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Posted May 09, 2014 - 08:00 AM

The head gasket is leaking at the front so I thought I would address that problem and maybe help the power a little to boot.....



#4 JDBrian OFFLINE  

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Posted May 09, 2014 - 08:33 AM

Try checking Brian Millers kohler site for advice on milling heads. I wouldn't do it on an older engine but on a fresh rebuild it may give you some extra ponies!



#5 KennyP OFFLINE  

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Posted May 09, 2014 - 09:10 AM

On the head I did, I started with 0.015" of warp in it. I had it flattened and back on in a couple hours.

 

Be sure to check the block too!



#6 LilysDad OFFLINE  

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Posted May 09, 2014 - 11:28 AM

According to Brian Miller, you can go .030" To play safe youy can put some modeling clay in  the valve pockets, put the head on, roll the engine over, the measure how much room you have to play with.



#7 LOW96HB OFFLINE  

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Posted May 09, 2014 - 12:01 PM

Thanks guys....Good info. The head is coming off tonight and going to the machine shop on Monday.






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