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ValveFloat's Avatar
 
Join Date: Jun 2003
Location: Montana
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Air injector plugs for 68 2.0L heads

The air injector holes in my heads are 12mm with what appears to be a 1.25mm pitch.

Has anyone else looked for plugs this size? Has anyone found plugs this size?

Thanks

Joe

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Joe
1993 C2
Old 08-18-2003, 11:11 AM
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"off the shelf" plugs seem to be 1.5 pitch but perhaps you could make plugs from 12 x 1.25 full threaded socket head cap screws or 12 x1.25 set screws if sealing on the threads is sufficient. See the on-line catalog at this website:

http://www.metricmcc.com/
Old 08-18-2003, 12:02 PM
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Thanks for the site! I was having a lot of trouble finding a M12x1.25 in a socket head.

Joe
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1993 C2
Old 08-18-2003, 12:21 PM
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So I ordered some M12x1.25 socket head cap screws only to find I did not measure the thread pitch correctly. The air injectors are even finer thread, probably M12x1.0. I have been able to find taps with this thread, so I guess I will search for a die and make some plugs.
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Old 08-27-2003, 03:35 PM
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air injector plugs are usually 10mm dia with 1mm pitch.
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Thank you for your time,
Old 08-29-2003, 07:38 AM
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...and it's nice if they are tapered as well. I tried using a straight thread and blew a plug out in 500 miles. That was sealed with red loctite, too!

I got my tapered plugs from jhelgesen on this board. It might be worth PMing him with specs to see if he has what you need.

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Old 08-29-2003, 08:29 AM
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