Guest shadetree77 Posted June 25, 2011 Share Posted June 25, 2011 So i'm doing my first tune-up on my 52 Special and in the service manual it says to gap the plugs to 0.023 "GO" and 0.028 "NO GO". So my question is, what do "GO" and "NO GO" mean? I've never heard these terms before. I gapped them to 0.025 which is sorta' in between these two numbers and put them back in. I haven't started the car yet as I still have to put in the new points and condenser and it's worrying me now that I've had time to dwell on it and I'm wondering if I should have done it differently. Anybody have any info. on these terms or what I should gap the plugs to? Link to comment Share on other sites More sharing options...
Aaron65 Posted June 25, 2011 Share Posted June 25, 2011 .025 is fine...what plugs are you using? I prefer AC. I'd avoid the Champion plugs they recommend in parts books; they're about 5 steps too hot. I use AC R45, though R45S works too. Link to comment Share on other sites More sharing options...
michel88 Posted June 25, 2011 Share Posted June 25, 2011 The manual was saying That the .023 feeler gauge should go into the gap, but the .028 should not go in. Your .025 setting is correct and right about in the middle between the two. Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted June 25, 2011 Share Posted June 25, 2011 As Aaron said .025 will be just fine. "Go" and "No Go" simply mean the .023 will pass through the gap but the .028 will not . Ben Link to comment Share on other sites More sharing options...
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