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intank manifold dirty

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This topic contains 1 reply, has 2 voices, and was last updated by Gary E Steele Gary E Steele 2 months, 1 week ago.

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  • #954057
    Osiel Carrillo
    Osiel Carrillo
    Participant

    Hello,
    On my 2008 odyssey 3.5L, 117K miles, I removed the valves cover to adjust the valves. But I shock to see one head so dirty and the other one (rear) nice and clean, WHY?????? Please help me, if need to remove head, bad oil lubrication??. Pcv? EGR? I changed the oil every 3-4K, since 23K.
    HELP,,, PLEASE

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  • #960363
    Gary E Steele
    Gary E Steele
    Participant

    i have a 2006, same issue but had a head gasket issue as to why i went into it. i have the 3.5 i VTEC. i believe the oil varnish staining is due to a poor engine design. if you also look you will notice the exhaust recirc porting for smog is on the fwd head only (more retained heat). the varnishing is due to the excessive heat and yes only on the fwd head because the rear 3 cylinders are shut down (or nearly) at freeway speeds to improve gas mileage leaving the engine to run off the fwd 3 cylinders, hence the fwd bank has more load and runs hotter. on mine, it was the fwd head that warped causing the loss of water and yes on the exhaust recirc end and had to replace the fwd cam also due to pitting on the intake lobes, i believe all heat related over time and not due to the loss of water. that was at 160,000. probably other issues related but that is my 2 cents.

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