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  1. #1

    Default what is proper plug gap on a 98 vortec 5.7?

    i am going to install a new set of plugs on my 98 silverado. i dont have a manual. i am looking for the proper spark plug gap for a vortec 5.7L?

    98 Silverado
    5.7 vortec
    14 bolt posi rear, with 373s
    3"body?1.5"susp.
    33" wild countrys
    tube steps, chrome kit, fenderflares,
    chrome diff plate, window flares,
    2-10"Alpine TypeE, Alpine 450watt V-Power.

  2. #2

    Default

    Quote Originally Posted by kawasaki_kid View Post
    i am going to install a new set of plugs on my 98 silverado. i dont have a manual. i am looking for the proper spark plug gap for a vortec 5.7L?
    Most of Today's Spark plugs are Pre-Gapped right out of the Box,.....The Gap is 0.60

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  3. #3

    Default

    okay thanks. to be honest ive never changed plugs on a car/truck before, just powersports and power equipment where i always double check the gap.

  4. #4
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    murdog94's Avatar
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    Default

    I would still double check the gap on them. And if you are going with factory AC delco plugs which work well in the Vortec motor then absolutely be sure you check. I just did them on my 1988 and they were gaped at .45.. Just a heads up
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  5. #5
    Sr. Apprentice
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    Default

    I looked in the Manual it is .060 inch gap.

  6. #6
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    OH no i meant the new ones out of the box were gapped at .45... just warning for a double check before installing the new ones.. The ones that came out were just plain old shot on my truck...

  7. #7
    Jr. Apprentice
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    changed mine yesterday and was gapped at .060 out the box. i did double check before i left the store though

  8. #8
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    Gotta love it.. they might actually be a bit different for the newer models... so who knows..

  9. #9

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    Quote Originally Posted by murdog94 View Post
    Gotta love it.. they might actually be a bit different for the newer models... so who knows..
    On the A/C Delco Online parts Catalog it show the following.
    On the,
    1988 to 1995 Chevy's with the 5.7 liter..350....the Gap is 0.45

    On the,
    1996 to 1999 Chevy's with the 5.7 Liter...350...the Gap is .060
    Last edited by 99'HEARTBEAT; 04-05-2010 at 09:52 AM.

  10. #10
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    See hence why i was WAAAYYY off... HAHA oh well elasson learned

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