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Keane165's 1970 LeMans

2022 June
of the Month

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Smog Plugs

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I am removing the smog pump from my 1966 Grand Prix. What is the size plug I need  that goes into the front of the head?



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I believe you need 1/2" pipe plug. If you want the correct look, look for plugs that have a square drive socket in the middle.

By all means, keep that pump in a safe place. While you may not use it, if anyone wants to restore that car to 100% original, they will have it. They are getting harder to find originals. May guys removed the smog pumps once they got them home from the dealerships back in the day and pitched them. 

Edited by Frosty
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