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73-87 Chevy _ GMC Trucks => Performance => Exhaust => Topic started by: zieg85 on April 22, 2020, 03:15:08 pm
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Has anyone removed leaky AIR system and plugged the manifolds? The thread size isn't standard pipe. Does anyone know of a source for plugs to delete these? The application is a 1986 Chevrolet C20 7.4L Thanks in advance
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Should be 1/2"-20 but check first to be sure.
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Should be 1/2"-20 but check first to be sure.
I measured the thread pitch and got 18. I will have to mic it. Thanks
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Let us know what you find. I have a set here I could dig out to check if it stops raining.
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Its been a long time since I plugged the AIR inputs on my Ford.
IIRC, I took off the AIR "manifold", cut each small pipe just above the screw-in fitting, and slipped the fitting off the pipe. Then I found ball bearings that were the right size and dropped them into each hole in the exhaust manifold. Then I screwed each fitting back on so the ball bearing sealed off the hole in the fitting. It was in the days before I discovered JB weld, but I think that would have helped with the sealing process. YMMV.
Bruce
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Very clever Bruce!
I did a valve job on a GM V6 only to have one of the center head bolts strip out in the block. :o
I found a longer head bolt that would reach into the block about 3/4", so I got the idea to find a nut and get it onto the bottom of the bolt.
Problem was obvious, but I found a way to get the nut down into the block.
I brazed a steel rod to the nut at just the right angle, and dropped it into the galley and BOOM! She grabbed, I torqued, and snipped off the steel rod.
Man was I glad to move that project down the road!