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Cold start rattle on LS3 - piston slap :) Engine replaced

Discussion in 'VF Holden Commodore (2013 - 2017)' started by Ron Burgundy, Oct 11, 2017.

  1. Pablito

    Pablito Well-Known Member

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    "We can't hear anything"
    Or
    " That sound is normal"
     
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  2. Mayuri Krab

    Mayuri Krab Member

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    Pretty much this... lol

    Service adviser said they spent 3.5 hours on the car and couldn't find anything wrong with it, engine sounded normal with just normal drivetraij noise and exhaust.

    Mentioned one of the bolts underneath was slightly loose and tightened that up...

    But the noise seem to have died down mostly by itself somehow... maybe its because I stopped caring too much.
     
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  3. immortality

    immortality Can't live without smoky bacon! Staff Member

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    Loose bolt for what? It may have contributed to strange noises.

    Years ago we had a strange rattle in the back of the car, turns out whom ever had fitted the brake pads hadn't put the little clips in properly and once the pads wore down a bit they started rattling. The tell tale was the noise went away when you applied the brakes. All 4 rear pads where the same so you have to wonder how many other cars out there had weird rattling noises in the rear cause whom ever fitted em didn't leave those clips like that by accident.
     
  4. Skylarking

    Skylarking Well-Known Member

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    First time I’ve heard a professional describe a loose bolt as nothing wrong o_O

    If this is normal, I’m surprised wheels aren’t falling off cars left right and center since checking underbody bolts is a dealer service item :eek:

    I’d probably be looking for someone else to service the car ;)
     
  5. Paulie81

    Paulie81 Active Member

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    Here is a recent video I recorded on my iPhone of the cold startup noise on my SS. You can really hear it when you get under the car. As others have posted it goes away after a few mins of driving and the engine reaches operating temperature. Still undecided whether to live with it or keep pushing Holden. I'm just worried they will do more harm than good.

     
  6. Anthony121

    Anthony121 Well-Known Member

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    I would be looking how much rattle it makes under load. Sounds like mine and it goes away after it is warm. No guarantee it will be gone if they fix it. My independent told me to leave it alone and showed me his LS3 in his HSV.
     
  7. Paulie81

    Paulie81 Active Member

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    So his HSV did the same?
     
  8. Ron Burgundy

    Ron Burgundy Well-Known Member

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    Keep pushing bruz
     
  9. Anthony121

    Anthony121 Well-Known Member

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    Yes but once warm it was ok.
     
  10. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Good old piston slap, lol, got to love Holden.
     
  11. Ron Burgundy

    Ron Burgundy Well-Known Member

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    Mine was not audible at idle...
    Only under load when cold...
     
  12. Mayuri Krab

    Mayuri Krab Member

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    Same with mine, no sound when cold started and idling around, but you hear a rattle tinging sound when accelerating from low speed at 1500rpm and above...

    If you open the door and accelerate slowly from 0 to 30km/h, you can hear the sound more clearly comimg from underneath the car.

    This particular noise goes quiet after a km or 2.

    My car also (seem to) makes other noises after warmup, but doesn't seem to be related to piston slap anymore, doing the same open the door and slowly accelerating to 30 from 0, the same noise present at cold engine is no longer present underneath the car. But I swear I could sometimes hear other tinging sound when accelerating... lol

    Of course my visit to the stealer yeids "nothings wrong was found" and "could only hear the bi-modal exhaust" lol
     
  13. Mayuri Krab

    Mayuri Krab Member

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    How many KMs has his and yours done with the PS symptom?

    From what I read, the general consensus is that it usually doesn't affect the engine reliability besides sounding like **** (every morning)... lol

    And after owning my last car (BMW 335i), with the N54vinfamous wastegate(s) rattle, I'm used to my engine sounding like **** as long as it doesn't cause any major issues med/long term (10 years, 160k km).
     
  14. Paulie81

    Paulie81 Active Member

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    here are some more recordings. Does not sound as bad in the garage. Definitely can hear it when driving it cold.




     
  15. Ron Burgundy

    Ron Burgundy Well-Known Member

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    Yeah...does not sound healthy
    Thats what mine sounded like.
    Try different dealer.
     
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  16. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Is it a diesel?
     
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  17. Paulie81

    Paulie81 Active Member

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    Its actually a good way to describe it. Sounds like my Wife's BMW X3 2.0T Diesel. almost ;)
     
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  18. Banjo79

    Banjo79 Active Member

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    First clip sounds a bit like a knocking lifter.
     
  19. Paulie81

    Paulie81 Active Member

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    But a noisy lifter sound would not go away once warm right?
     
  20. Ron Burgundy

    Ron Burgundy Well-Known Member

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    Not lifter
    Excess piston to bore clearance for sure
     

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