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Old 03-01-2021, 11:47 PM   #1
Cris
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Join Date: Aug 2016
Location: Los Altos Hills, California
Posts: 170
Thread Size of EGR on a 292 Head

I tried another forum and came up dry. I am hoping someone has this information. I am refreshing a head on a 292 and am going to plug the EGR ports. This is a later model head with the larger thread size. Does anyone know the thread size? It is definitely an oddball. I would like to run a tap through them as the threads look a little suspect.

My guess right now is a metric pipe thread M18-1.5 ????
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