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  • hardtopte72 ·
    Drilling won't throw it out of balance.

    I doubt the pistons Rockauto sells are the updated design. If you have the knowhow, consider drilling them and reporting back.
    hardtopte72 ·
    Drilling pistons and replacing rings was a common repair in older Toyotas with the same problem. I don't know of anyone who has drilled holes for a newer 2AZFE, but I imagine it would probably work.

    Toyota recommends a new piston with rings. I believe the pistons are the only redesigned part, but I'm not sure.

    Here is a pdf which covers the issue and part numbers:

    http://media.fixed-ops.com/Toy_ServiceBulletins/sb0094t11.pdf

    Hope that helps.
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