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engine knock
1-6 of 6 Results
  1. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hello all, I have a 2004 Envoy with about 150,000 miles and it is making this knocking noise from the engine. I have taken the belt off and none of the pulleys are bad. It has been making the noise for years now and it doesn't effect how the truck drives. below is a video of the noise.
  2. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Let my oil get lower than I would like. 4.2 vortec in a 2008 GMC envoy. Sounds like rod berring knock and she drank 4 quarts plus honey. Drove it 3 miles and it stalled at every intersection. I also couldn't use drive, only 1,2,3 gears and then it would stall again slowing down/ stopping. I am...
  3. Engine Tunes/Mods
    So I took a spirited ride down the on-ramp the other day, and now I have some noises that are not just LS noise. I cant think any reason I cant put any old 5.3 in my car? These mid summer LS prices have me looking at rebuilding it myself. All I get from the salvage yards is (it has to 2007...
  4. Engine Tunes/Mods
    Hello ´ I have a Problem with my 2003 chevy Tailblazer. Please help me!!! There is a noise or a knocking. You can hear it in this Video. youtube.com/watch?v=UOYxJfgMajI
  5. OEM Issues
    I am new to this site and hoping someone can help. I have a 2003 trailblazer 4.2L I6 with an upper engine knock. The noise is coming from the upper front of the engine. Have ruled out the accessories on the front of the engine by running the engine without the serpentine belt, noise still...
  6. OEM Issues
    so today im driving home from houston texas i45 ya know i change lanes see a jerkwad coming get on it and notice a loss of power well then i hit the traffic and hear a thump under the hood reassuring myself it wasnt me i slipped it into neautral however you spell iy lol and revved it up it was...
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