.43 is the gap
.43 gap
.43
43 thousands of an inch
the gap is as follows; US .39 to .43 inch Canada .28 to .31 inch plug is a NGK BPR5ES-11, BP5ES-11 On Autolite Platinum - 63 plugs the gap is .44
It's .39 to .43
Don't really know because the manual states on 1-43 0.0048 but also states 0.0035
.38-.43 with .40 ideal for idle and highway speeds
Between 40 and 45 on the gap gauge. Start with 40. Try 43 if not happy, then 45. If 40 to 45 does not perform correctly, there is something not right.
You should have them at 40 to 45 with a gap gauge. Try 40 first. Go 43 next, if you are not happy. Anything over 45 would not be good.
If it's electronic ignition the plug gap should be 1.1mm you buy spark plugs already sized (NGK BP5ES-11) It depends on what type of spark plugs you are using. For conventional plugs the gap of 1.0 - 1.1 mm (0.039 to 43") is correct. If you are running Platinum plugs, I like to gap at 0.005" extra (0.44 - 0.048"). I get good performance with NGK 7082 Platinum. Cheers Malcolm
I believe my 1995 Century has the same motor (3100). My gap setting is .060 inches. You can double check in the "capacities and specifications" section in your owner's manual. Or triple check on your emissions sticker under the hood, usually on the passenger strut tower.