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  1. #1

    Angry 5.3 engine knock

    I have a 2001 silverado with a 5.3. When starting with cold engine, after about 10 sec it starts to knock. It continues for about 30 sec, never to be heard again until the next cold start. Not a lifter tick. Gets louder when put in gear (auto trans). Any ideas?

    Chevy Engine

  2. #2
    Moderator

    dwill3015's Avatar
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    Welcome to the site!
    My Wife's 2001 Suburban 5.3 has the same prob. and I know we have had other discussions on here about it common with most 5.3's. Maybe someone can find some of those threads for us?
    Darcy
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

  3. #3
    Master Mechanic TahoeFever's Avatar
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    dealership found 2 plugs loose and the knocking went away

    that knocking drives me nuts now i got a bearing noise when the truck is cold
    04 Tahoe LT 5.3L stock MSD 8.5mm Wires
    Gigbson Duels Straight Exhaust, Parrot 3100 Bluetooth
    K&N 77 Series CAI, Sirius Radio
    De-badged, Valet Dei remote start
    5000k HID -Higherlevelauto.com
    Federal 100watt air horn

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