912 cylinder head damage

[bigbrotherjohn]

I feel like I'm breaking the law posting here about my 912, but answers are a long time coming on the 912 forum. So I need your help. Thanks.

One of the combustion chambers on one of my cylinder heads was damaged by the previous owner. A washer was accidentily dropped into the carburetor and found its way into the cylinder. This resulted in some pretty deep gouges in the head. So what I did was grind off enough material from the head so that it was smooth and the gouges were gone. This required removing about 2cc's. The heads were cc'd pretty well before this whole mess and were at ~60.5cc's. Now what should I do. Should I remove 2cc's from the other heads, and lose compression (about a quarter point, couple horse power). Would it be possible or advisable to use JB Weld or something like it to put new material on the head so I can keep the compression up?

[Wayne 962]

Hi there. I would check to see how much good used heads are - last time I checked they were semi-plentiful...

Putting JB Weld on the inside of a combustion chamber would probably last at most 2 seconds.

-Wayne

[bigbrotherjohn]

thats about what I expected. Short of getting new heads what could I do to raise my compression after I've removed material from the head. And I agree with you about heads being plentiful but it's hard to find a pair that haven't been flycut or otherwise changed. thanks for helping out a 912 guy, hey were porsche people to.

[Wayne 962]

You could have them welded up to repair the sections that you grinded away. It's relatively easy - EMS (Engine Machine Service) here in LA does this type of work all the time...

-Wayne