I'm sure this has already been addressed but just want some clarification. I have replaced many plugs in my 36 years of life - I remember the good old days when I would adjust the gap with the precision of a NASA engineer (with a $2 tool)
Now it seems all of the plugs come pre-gapped - but I of course check them before installing. Usually I find that they are not within what the engine manufacturer specifies. Until now I always have adjusted them even though the counter guys at the parts store said not to. What do ya'll do?
Now it seems all of the plugs come pre-gapped - but I of course check them before installing. Usually I find that they are not within what the engine manufacturer specifies. Until now I always have adjusted them even though the counter guys at the parts store said not to. What do ya'll do?