1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Valve rattle?

Discussion in 'Knowledge Base Articles Discussion' started by duncan442, Feb 6, 2009.

  1. duncan442

    duncan442 New Member

    Joined:
    Apr 5, 2005
    8
    0
    0
    I have recently started to notice a rattle from the engine of my 04 on acceleration, particularly from cold start. Sounds like it is the valves....

    Is this common? Should I be concerned?

    It is due for it's 60k soon and is still under extended warranty so I will probably mention it when I take it in but I would like to get some background info first if possible.

    Thanks

    Duncan
     
  2. patsparks

    patsparks An Aussie perspective

    Joined:
    Jul 12, 2007
    10,664
    567
    0
    Location:
    Adelaide South Australia
    Vehicle:
    2004 Prius
    Model:
    N/A
    It's most likely valve lash, no big deal. You may decide to have the valve clearance adjusted or you may not. It makes little difference apart from a little noise. Valve noise is made worse by using thin oil like 0w-15 or 5w-20 because it doesn't damp the noise but it doesn't accelerate wear.
     
  3. duncan442

    duncan442 New Member

    Joined:
    Apr 5, 2005
    8
    0
    0
  4. Genoz World

    Genoz World ZEN-style living

    Joined:
    Feb 21, 2008
    797
    21
    0
    Location:
    La Canada
    Vehicle:
    Other Hybrid
    Model:
    N/A
    you know, change the oil and filter. it helped to do this once, it's worth a try.
     
  5. florachristi

    florachristi New Member

    Joined:
    Dec 5, 2008
    4
    0
    0
    Location:
    California
    Vehicle:
    2003 Prius
    By using oil and keeping the filter clean it wont get that much noise...