Engine & Gearbox K20A6 2003 engine noise

Discussion in '7th Generation (2003-2008) [Acura TSX]' started by nemiers, Sunday 9th Nov, 2014.

  1. nemiers Club Member ★ ☆ ☆ ☆ ☆

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    Hi,

    Not long ago we bought this Honda Accord 2003 CM1, 250k kilometers driven.
    As usual all seemed fine after buying car until some 3 weeks later I noticed engine noise
    similar to diesel, only audible in low revs. Seems to be quiet or absent with hot engine and high rpms.
    Oil is fresh, but have no idea what oil previous owner put there. Also drive belt needs replacement.
    Some information I found in the net is that it could be some oil pressure related problems, some say sound is gone
    for a while after cleaning VTEC solenoid. For me its more like rod or crankshaft bearings on the way out.
    Any help and tips appreciated! Here´s video, what you think?
     
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  2. Ichiban Founder Staff Team

    England CJ Leeds
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    Can be a couple of thjings

    1) Partially Seized engine
    2) noisy aux belt tensioner, alternator?
    3) noisy water pulley
    4) valve clearances out of spec.
    5) stretched timing chain.
     
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  3. nemiers Club Member ★ ☆ ☆ ☆ ☆

    Finland
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    Would this mean easier to swap engine with lower miles one, than loose same money troubleshooting this one?
    Forgot to mention that engine runs quiet nice, feels that all ponies could be still there :Laughing:
     
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  4. Ichiban Founder Staff Team

    England CJ Leeds
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    I think its worth while investigating it you never know its a simple fix, it will give you more satisfaction you fixed than swapping it.
     
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  5. nemiers Club Member ★ ☆ ☆ ☆ ☆

    Finland
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    Ok, thanks.
    I´ll start tomorrow with new belt, at a same time inspect pulleys.
    Next will be oil change 0W30, or maybe adjust valves first?
     
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  6. Ichiban Founder Staff Team

    England CJ Leeds
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    Take the aux belt off and start the engine and see if the noise does persists if it does not , then its a case of turning the pulleys by hand for free play and noise, your fingertips will pick that up easily.

    if it still there then you can concentrate on valve cover removal and see the engine condition.
     
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  7. nemiers Club Member ★ ☆ ☆ ☆ ☆

    Finland
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    So, I have some updates, looks like tensioner pulley needs replacement.
    Some old belt residue on AC pulley. Water pump pulley seems to be ok.
    When started car, dieselish sound seems to be still there.

    20141110_131048. 20141110_131126.
     
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    Ichiban likes this.
  8. Ichiban Founder Staff Team

    England CJ Leeds
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    Brilliant news that is a super easy fix. :Yahoo::clap:get a clip of the engine running without the belt.
     
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  9. nemiers Club Member ★ ☆ ☆ ☆ ☆

    Finland
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    So here`s a video with belt taken off.
    Had some "fun" removing old belt leftovers from AC pulley.
    Also could be reason of belt squeak.
    I think that initial engine noise is still there, so next step to take valve cover off
    and check valve clearances. Of course change belt and tension pulley after I order them.

    20141110_150620.
     
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  10. Ichiban Founder Staff Team

    England CJ Leeds
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    Take the valve cover off and have a look at the valve clearance, it will show what condition the engine is and oil changes frequency too.

    Does your dash have the MIL lit? any chance of getting the DTC read and sharing them here.
     
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  11. nemiers Club Member ★ ☆ ☆ ☆ ☆

    Finland
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    No there`s no MIL lit, and recently I checked no codes stored neither.
    Didn`t have time to do any work on car today, will try tomorrow.
     
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  12. Ichiban Founder Staff Team

    England CJ Leeds
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    No worries keep us posted.
     
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  13. SpeedyGee Administrator Staff Team

    England Speedy Birmingham
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    Sounds quite tappety but that could just be that it needs valve clearances doing as CJ has said.

    Would be worth putting a towel over fuel injector rail to eliminate the tappety sound from the injectors so you can listen to just the sound from the engine.