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David Wilson (not verified)    March 30, 2023 - 1:08PM

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Understand there are problems developing in #1 and #6 exhaust valve ports of 3.5 liter Toyota V6s. Due to offset of exhaust manifold port there is excessive heating on the cyclinder wall and piston leading to low compression and misfire reading plus valve failure. Dealers seeing more and more of these at 90,000+ miles. Toyota has been silent on this. For more info go to You Tube and look at video on hidden problems with Toyota 3.5 engine. Mine just failed and Toyota is non responsive on issue with no support to long term Toyota Owner. Vehicle maintained by dealer who has also been silent.

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