308 Cylinder Head Smog

I am in the process of reconditioning my cylinder heads after an engine failure. My question is, can these be deleted? (See Picture). They seem to cause nothing but turbulence.

Thanks,
Jeff

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Those are air injection tubes and if you no longer have any smog concern, you can remove those and plug the holes.

 

That's what I thought.... wanted to be sure first. Thank you.

 

But best to use a "plug" with an end shape that fills the smaller hole (not just a flat ended M14 plug). Do a search on "108205" for prior threads:
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Does someone manufacture these plugs?

 

Do the search and read. Verell Boaen at Unobtanium Supply may be one source (but he has said he is backed up lately), or I've previously posted a drawing that you can take to a Machine Shop for fabrication.

 

Available at UnobtainiumSupply.com but he might be busy for a while.

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Thank you.

 

In addition to Steve's notes, if you are a DIY-sort of a guy, do a search under my user name in this specific forum for an old pictorial thread where I've documented making scribed-end plugs out of your old nozzles, for only the cost of a cheap bolt.

I like this concept as it allows the angled matching of the end of the plugs to the head's exhaust port walls for a divot-free end result.

Typical picture from my archives (details and more pics can be found at the above referenced old thread):

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If you are really handy and have a lathe you can make your own, this one is for the 2 v engine.
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I'm always pleased by the technical knowledge and sharing of information by FChat members. It helps to keep the vehicles surviving, while not draining the bank account too much.

 

I don't have a lathe but I do have a welder. I would remove the injection piece, cut the stem off close to the top, weld it shut, and put the piece back. I sure would not want to wait for Verell to catch up to his order.