New out of the box AC Delco 41-940 Professional Double Platinium plugs are all pre gapped at approx .50 not .60 as in the specs. Replacing them in a 1999 Venture. Supposedly you should not re-gap them. Should they be gapped at .60 or what?New plugs look cheezier than same plug number with different UPC code.These have AX and either 1C or 1D stamped in them and the ground electrode looks inferier to the previous plugs with the same 41-940 number. Box still has the 19244474 number on it and the UPC code on each plug is 707773616260. Originally got 2 older plugs with a different UPC and a niceer looking ground electrode which were gapped at .60.What do I do with these? Re-gap them or install them as they are?
can you return them to the store you bought them at????could the spark plugs have been mixed up???if they are the same spark plug... a LONG time ago. delco spark plugs had a problem.. at some point of their production.. or shipping... the boxes got smacked on one end which closed the gaps if the were that way in the box... it took a LONG time to figure out where the problem was... and even longer to work all the MILLIONS of spark plugs with closed gaps out of the parts chain.. if you can change the gap.. without touching the center electrode... and it looks correct... you might go for it.. as i understand.. the side electrodes are longer for the .060 spark plugs than the .050...