Head just resurfaced, is this good enough ?

[darknezz7]

I was also pretty sure the round tab in second pic middle left was the marker for service limit>?

 

[2slow4now]

Any word serviceguy on the lie the machine shop is telling? That head looks like they put it on a flat table with sand paper and went north-south, northeast-southwest, northwest-southeast by hand. They probably don't have a belt sander but I bet they have a surfacing table. All it would be is a level and true marble/granite slab on a table and they lay a sheet of sand paper on it then slide the item they want to "surface" by hand on the sand paper. Table may look like this, http://catalog.wlimg.com/1/32303/full-images/granite-surface-plates-1024625.jpg or could be just a slab of marble sitting on a work bench. They are bold face lying to you that it was CNC. Then if it was truely CNC then why would they go over it with a scotchbrite and make it uneven again? Machine to a perfect surface then rough it up by hand. That makes no sense at all.

Pull images off the internet verifying what a sanded and CNC surfaced head look like. I see a few you could use up above. Does the shop have other heads laying around done? Look at them. Can you see into the shop? Do they even have a CNC machine? Nose around as much as you can.

Yes the circle spots on the head are there for service limit indicators.

 

[serviceguy]

Yes, the head looks like it had been belt sanded, table surfaced or whatever. The machine shop says they did use a CNC mill that they use for all the resurfacing jobs and then dulled the surface with scotch-brite. I've seen it while they were doing it at the shop on a just milled head and my head still shows the circular tool marks under the light scuffing but that doesn't mean they actually did what they said they did, I guess it comes down to the shop's reputation which apparently is good (I still have my doubts based on this very experience). But it could have been lightly block or belt sanded or put on a surfacing table, I don't have any way to know unless I could travel back in time, and trust me I would really like to be able and do just that. That said, I can't just barge in the shop and say they are lying based on a picture downloaded from the internet. I appreciate the input, I do, and I get what it looks like, so much that I was the one doubting the job in the first place or I wouldn't have posted that picture in the first place. The head is on the block now, I'll button it up and see how it goes. If the headgasket does not seal I will be back complaining to them, until then I don't think I've got many options.

On a side note, those are not inspection marks to the best of my knowledge which isn't much. If they are, can anybody pint out where is anywhere stated they are? The service manual clearly doesn't say it, as it specifically says that you're supposed to check the total head thickness which is also the reference for machine shops. There's a very informative thread to this regard on DSMTalk.com from BogusSVO here (sorry if using an external reference breaks any etiquette but I could not find his equivalent thread in here) and you can check out what the service manual says about engine thickness below.

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[2slow4now]

I stand corrected. Those circular spots are the place you measure head thickness. Good ole Bogus! http://www.dsmtuners.com/threads/how-to-measure-a-4g63-for-cylinder-head-for-thickness.413757/ 5th pic down shows measuring off those "injection bosses".