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    shaneels's Avatar
    shaneels Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 14, 2008, 12:20 AM
    1999 Toyota Duet Smoke excessive smoke emission
    Hi I have problem with too much emission of smoke. Even more excessive smoke in the morning. Can't even see anyone around the vehicle!! Took it to toyota for diagnostics they discovered valve seal leaked and oil dropping on top of number 1 piston. Have changed the valve seals but still same problem. Changed oil and filter still same problem. Could anyone tell me what this would be??
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #2

    Oct 14, 2008, 07:45 PM

    If the valve stem seal has been replaced, but the condition still exists, the problem is likely a worn valve guide. That would require a new cylinder head. Once the valve guide bore is worn, little can be done to prevent oil from finding a way into the combustion chamber.
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