Jon Jones Posted July 28, 2020 Share Posted July 28, 2020 Does anyone experience Slap Piston with their Toyota Sienna. My van has 250,000 and I have had had this for about a year. Is it worth fixing? Quote Link to comment Share on other sites More sharing options...
blockmachining Posted August 30, 2021 Share Posted August 30, 2021 Piston slap is generally caused by the side skirts of the piston being worn. This can be caused just by a high mileage engine, wrong weight engine oil used for a long time of even a clogged oil jet at the base of a rod. Unfortunately, that slap or knock you are hearing has probably scratched the cylinder bore wall also. Saying that, you’ll need new pistons, rings bearings, maybe oil jets and a cylinder honing job. Will get a little expensive more than likely Quote Link to comment Share on other sites More sharing options...
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