Smog System 1970 LT1
I am in the process of cleaning and getting my 1970 LT1 back to original as best as possible. It was missing the Smog system and I will be adding it back soon. I have a "de-veined" /free wheeling pump so it will not be functioning. Question I have; what is the best way to have an original look and keep my nice restored parts, exhaust tubes, check valves, diverter valve, looking good. My thoughts are to block the exhaust tubes to stop the hot gases at the exhaust manifold and block the vacuum hose to the muffler so it looks right, but I won't have a vacuum leak. Any suggestions are appreciated.
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Re: Smog System 1970 LT1
Leonard -
To maintain the finishes on the air manifolds and keep hot exhaust gases out of the pump, rubber hoses, check valves, etc., remove each of the stainless extension tubes from the tube nut holes in the exhaust manifold and replace them with #10 x 1/2" stainless flat head machine screws. They will permanently plug the holes, and when the tube nuts are tightened, the same number of threads will show as with the extension tubes in place. Stick a BB in the rubber vacuum hose from the carb base to the diverter valve; if the valve diaphragm has failed (and most have), it will become a vacuum leak unless you plug the signal hose. -
Re: Smog System 1970 LT1
Thank you John. I appreciate your advice.Comment
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