Question about 1998 Isuzu Rodeo

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Engine Knock on a 98 Isuzu Rodeo

Oil was 1/2 quart low, a friend was borrowing it and the motor started knocking. She drove it about 3 miles before realizing that it was knocking. I put oil in however, I ended up putting 5 quarts in. The motor is not seized up, the knocking has subsided a little bit but has not quit. The knocking gets worse as the vehicle idles up. I was told it could be a crank bearing?? Please help.

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  • Anonymous Feb 25, 2009

    same problem , it is a flaw in the piston ring design, which causes it to burn an excessive amount of oil, leaving you with a quart or less when it eats up the rod bearings on the crank, yes a rebuild is the only solution, a motor with lesser miles is still prone to the same happenings due to it having the same defective parts. Some after market companies have aftermarket design piston rings and pistons in an engine rebuild kit for the 3.2 as well as the 3.5 motors with this problem

  • Brandy Mooney
    Brandy Mooney May 11, 2010

    is this a tap or a knock?

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Most likely it is a rod bearing and motor would have to be dissassembled to diagnose, you might want think about installing a low milege used replacment since it was run 5 quarts low on motor oil.

Posted on Nov 30, 2008

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