Plug air injection ports on 2.0l heads? |
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Plug air injection ports on 2.0l heads? |
tornik550 |
Aug 2 2011, 05:35 PM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
Is it possible to easily and reliably plug the air injection ports on 2.0l heads that have the ports? If there is a way, would it effect airflow?
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AZ914 |
Aug 2 2011, 05:37 PM
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#2
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914 Dumbass Group: Members Posts: 1,459 Joined: 6-January 03 From: Sunny Tucson Member No.: 98 Region Association: Southwest Region |
It can be done in two different ways.
1. Cap the tubes, 2. Remove the tubes and plug the holes. (or I guess if the heads are off, you could weld them shut) Here is an old link that gives some information on this: http://www.914world.com/bbs2/index.php?act...r,and,injection |
tornik550 |
Aug 2 2011, 05:42 PM
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#3
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
It can be done in two different ways. 1. Cap the tubes, 2. Remove the tubes and plug the holes. (or I guess if the heads are off, you could weld them shut) Here is an old link that gives some information on this: http://www.914world.com/bbs2/index.php?act...r,and,injection Wow- amazing. thank you for the response. I hadn't even had this posted for 2 minutes before I got a response!!! |
TC Johnson |
Aug 16 2011, 11:58 AM
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#4
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Newbie Group: Members Posts: 48 Joined: 22-December 04 From: Easton PA Member No.: 3,321 Region Association: None |
Greetings!
It has been a long time since my last post, but am back working on my '76 teener. After pulling the air injection lines from my car, I have read a number of these posts to be able to effectively plug the ports. Capping seems to be the most popular and effective to preserve a future owner's ability to re-install the pump and lines. I was on the McMaster Carr site and found acorn nuts in a variety of materials from brass to stainless and many metric sizes. Does anyone knows the actual thread size on top the injector pipe where the lines connected. I know the NPT stuff has been used, but a proper fitting cap with some muffler seal would seem to be the best long term solution. Thanks in advance. Tom |
type47 |
Aug 16 2011, 01:01 PM
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#5
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
I thought I remembered that valve adjust screws fit. I have plenty of used valve adjust screws!
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TC Johnson |
Aug 16 2011, 01:24 PM
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#6
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Newbie Group: Members Posts: 48 Joined: 22-December 04 From: Easton PA Member No.: 3,321 Region Association: None |
I know the valve adjust screws fit in the head, but I am thinking about the size of the threads on top of the air injector where the pipes fit on them.
Anyone? Tom |
Tom |
Aug 16 2011, 02:38 PM
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#7
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
I pulled one of my air injection tubes out and took it with me to Tacoma Screw and found some nice brass caps. I THINK they are 3/8 pipe threads. Anyway they fit well, don't leak, and look pretty good also. Like you, I wanted to make it easy for the next owner to go back to completely stock if desired or required. Tom
Attached thumbnail(s) Attached image(s) |
shelby/914 |
Aug 16 2011, 03:20 PM
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#8
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Senior Member Group: Members Posts: 804 Joined: 24-August 05 From: Foxfield, Co Member No.: 4,655 Region Association: Rocky Mountains |
I pulled one of the injector tubes and took it to a specialty fastener place and they came with some odd ball british pipe thread size. Sold me some nice bolts for $6 each, but they fit perfectly. Sorry can't remember what exact size they were. Would definitely try for the correct size and not screw up the threads, just in case you ever want to reinstall the air injection. The PO used JB weld and some brass caps but he didn't seem to get them sealed very well so I switched out to the bolts.
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Krieger |
Aug 16 2011, 05:11 PM
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#9
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Advanced Member Group: Members Posts: 4,711 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None |
I got mine years ago from performace products or tweeks. I think they were sold as 911 air injection plugs. Home depot does have the galvanized end caps that fit are pipe thread (for end of air injectors screwed into head).
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jimkelly |
Aug 16 2011, 05:33 PM
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#10
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
pic
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Tom |
Aug 18 2011, 08:37 AM
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#11
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
My first posted pics in answer above. here are a couple more.
Tom Attached thumbnail(s) |
Tom_in_NH |
Oct 13 2022, 04:28 PM
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#12
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Newbie Group: Members Posts: 9 Joined: 21-August 22 From: FL Member No.: 26,792 Region Association: None |
I thought I'd share my experience with this. Car is a '76 2.0 California spec. I removed the air pump and the air injection manifold. I also removed one of the air injection nozzles to take to the hardware store. The thread on the "head end" of the nozzle is a M10-1.0. Its 50mm from the tip to the seat. The perfect bolt to replace the nozzle is a M10-1.0x50 socket head (allen).
I originally had planned to simply cap the the nozzles in-situ. However, they are definitely not 3/8 NPT as suggested in this thread. I was able to easily thread a M16-1.5 nut on the coupling end of the nozzle. I figured I wouldn't come up with a cap of that size easily, so I went the nozzle removal route and replaced with the bolt above. Tom 83 911SC 3.4 76 914 2.0 |
dlee6204 |
Oct 13 2022, 05:39 PM
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#13
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Howdy Group: Members Posts: 2,162 Joined: 30-April 06 From: Burnsville, NC Member No.: 5,956 |
I originally had planned to simply cap the the nozzles in-situ. However, they are definitely not 3/8 NPT as suggested in this thread. I was able to easily thread a M16-1.5 nut on the coupling end of the nozzle. I figured I wouldn't come up with a cap of that size easily, so I went the nozzle removal route and replaced with the bolt above. The end of the nozzle is indeed M16. I bought some acorn nuts from Belmtric although I think my preferred method is replacing the nozzle with a bolt. |
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