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tom 6/24/2010
2002 Chevrolet Silverado 1500 LS 8 Cyl 5.3L - Engine
i purchesed a set of denso plat plugs parts said set gat @ .040 chevy man says .060 what do u think
pt16tt 4511 (part #)
3 Answers
  • jdreedchicagoll
    jdreedchicagoll 5/7/2012
    go .040
  • bear.1216
    bear.1216 9/4/2013
    Proper spark gap can be found on vehicle emmisions label under the hood. It is a white sticker attached under the hood. It lists emmision controls vacuum diagram and has engine info like engine size and tune-up settings like spark timing and gap.
  • Jimm
    Jimm 9/4/2013
    The correct gap for the Denso #4511 spark plug is: 0.040". Some plugs specifiy a 0.045" gap - such as the AC Delco # 6 plug - for this same engine and application; 5.3L 2002 Chevy Silverado.
    The exact plug gap would depend in part, on the spark plug design and manufacturer - not all plugs will have the same gap specification - even for the same vehicle and engine.

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