Valves Rattling

Discussion in 'General Motoring' started by jbeary, Jul 6, 2004.

  1. jbeary

    jbeary Guest

    Hello All,

    This is my first post so please be kind. We have a 1997 Subaru Legacy
    Outback and recently the valves are rattling like crazy. Can anyone tell
    me if they have had problems like this in the past? Our car has only 90k
    on it and I never expected it to develop this issue so soon.

    Thanks in advance for your help.

    Regards,
    Jeff
     
    jbeary, Jul 6, 2004
    #1
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  2. jbeary

    Henry Paul Guest

    I have heard from some people that running a thicker grade engine oil helps.
    It you have a 0-30 or 5-30 oil try moving up to a 10-30.
     
    Henry Paul, Jul 7, 2004
    #2
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  3. jbeary

    Jim Stewart Guest

    Does it happen all the time or just when it's
    cold? How about when you accelerate? (if so,
    it's something different than valves)

    Does it have oil in it? (sorry, I have to ask)
    Have you used a cheap oil filter at your last
    change? Oil filters can leak down and cause
    a lot of startup noise.

    jim
     
    Jim Stewart, Jul 7, 2004
    #3
  4. jbeary

    Edward Hayes Guest

    The oil supply holes to the rocker shafts and or tappets can become slugged
    up after a while, especially if you ignored regular oil/filter changes. You
    maybe instead of going to a heaver oil would be to use an additive like
    Reslone to clean out small oil passages.. Run the engine for 500 miles or so
    and then change oil to factory recommendation i.e. 5w30?. Let us know what
    worked. Someone else on a Suby news group suggest MMO additive for this very
    thing and maybe he will see this thread and respond. I have had good luck
    with Reslone (Wal-Mart for 5 bucks or so) ed
     
    Edward Hayes, Jul 7, 2004
    #4
  5. jbeary

    Peter Berbee Guest

    The outback went to solid lifters in '97, so you don't have an oil problem.
    The valves may just need adjustment at 90k miles. Does the noise get better
    when the engine warms up? If it goes away when the engine is warms up,
    everything is fine. If the noise is still there, have the valves adjusted.

    Peter
     
    Peter Berbee, Jul 7, 2004
    #5
  6. jbeary

    Jim Stewart Guest


    I hope you or someone else can clarify this for me.
    I have a '99 DOHC 2.5 engine. I've had the left
    side camshaft out because of an issue unrelated to
    noise. I know that this engine uses shims for valve
    adjustment. What I don't understand is that the
    cam followers appeared to be full of oil when I
    removed them and they made lots of noise on first
    startup until they filled with oil again.

    So does anyone know exactly how this works? It
    would appear to me that a top end oil problem might
    very well cause valve noise despite the lifter
    arrangement. What's the deal with the follower?
    Does the oil pressure press it against the cam
    lob all the time to reduce noise?
     
    Jim Stewart, Jul 7, 2004
    #6
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