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914World.com _ 914World Garage _ Plug Air Injection Tubes on 2.0 Motor

Posted by: mdelwiche Jun 1 2013, 12:35 PM

Does anyone have an idea of what to size or type of bolt to use to plug the holes where the air injection tubes go? I am rebuilding my 2.0L motor and do not plan on reinstalling all the emissions equipment.

Posted by: 76-914 Jun 1 2013, 01:08 PM

Don't know the metric size in the head to plug. That was covered here in the last few months. I'm not good at searches. If you re-use the nipple then a 3/8" pipe cap will screw on the end.

Posted by: Drums66 Jun 1 2013, 01:34 PM

.....I don't know the details?but.there is also a copper
plug that is used. that i've seen on heads that were done
on my cars!

Posted by: mdelwiche Jun 1 2013, 01:49 PM

One of the air tubes was torn up pretty good when I removed it because it had rusted into place and is not re-usable...otherwise I would get the caps--unless I can find another one, but so far they have been pretty hard to find and/or way to expensive for my taste.

Posted by: r_towle Jun 1 2013, 03:15 PM

Bring the tube to the hardware store.....it's not a special order bolt.

Rich

Posted by: Krieger Jun 1 2013, 06:50 PM

Call Engine Builders Supply in Reno. IIRC they are the same plugs 911s use.

Posted by: McMark Jun 1 2013, 08:30 PM

The threads are M10x1.00. A bolt of the correct length will work fine. You can get plugs that will go down inside, but I prefer bolts because of the friction of the bolt head will help keep things in place.

Posted by: brant Jun 1 2013, 10:31 PM

ball bearings and caps (American thread works believe it or not)

go to ace hardware with one of the injection plugs and its easy to piece together

Posted by: hedfurst Jun 2 2013, 06:59 AM

Same size as the 2 Liter valve adjust screw. I have inserted them covered with teflon tape, works well unless the threads are screwed up.