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Head gasket- how far to mill heads?

1K views 5 replies 4 participants last post by  WiCkeDuDe 
#1 ·
I think I might have a small HG leak. I have the code for misfire on #5 and I've been SLOWLY loosing coolant(loosing it from radiator, doesn't want to pull it in from reserve). Changed plugs and swapped coils and still get the same code. I'll do some more digging and do a compression test before I buy anything.

Anyway if it turns out to be the HG I'll have them resurfaced anyway, so how far down can I have them milled? Might as well bump the compression up slightly while I'm at it. I've done that on every other vehicle I've replaced a HG on.
 
#4 ·
Then just take off the minimum to get them flat. You can also deck the block too, which is what I always do on my rebuilds. Never had a problem doing both, but my machine shop does just take off whats needed and no more.

Martin
 
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