Bad Port Job

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Sep 25, 2012 | 09:28 PM

RallyBoy

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Bad Port Job

I was just wondering what a bad port job looks like. When looking from the top of the head into the inside of the intake and exhaust ports, I see areas that look like too much material was removed. Should it be smooth all of the way through? I hope what I'm asking makes sense.

Sep 25, 2012 | 09:56 PM

96capricemgr

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define "smooth" the actual texture is not that big a deal. If there are waves or big humps/dips from where a cutter got away from the porter I might be concerned. That said sometimes CNC'd heads will have some "as cast" areas left behind due to core shift, even high quality head work.

Can you take them to a professional and have them looked at?
I really don't think people describing things over the internet will help a lot and taking good pictures of such a thing is a challenge, a picture ona computer screen can be very decieving vs. what is or is not actually there.

Sep 25, 2012 | 10:20 PM

RallyBoy

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Thanks for the reply. Well, the texture is smooth. I just noticed areas where there is an actual hole through the metal, like too much material was removed in that particular spot. I wish I had pictures.

Sep 26, 2012 | 05:01 AM

bufmatmuslepants

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That's probably the rocker stud, that hole is normal, just be sure you use good thread sealer on your studs.

Sep 26, 2012 | 06:39 AM

96capricemgr

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In very well ported heads the rocker stud holes will be open into the intake ports. Now if you see just a couple that could indicate inconsistency port to port which would be bad.