08 Gs350 #6 Cylinder Piston Destroyed On Start Up

[mgf]

Has anyone had a problem with a motor lockup on start up, piston destroyed, spark plug, cylinder head?

[1990LS400]

Was your GS 350 one of the 2007-2008 that was subject of the recall to replace engine valve springs?

[mgf]

yes it was in the recall

[1990LS400]

Sorry, I was typing on a phone earlier. My assumption is that your engine failure is related to improper work or defective parts used in the recall. Toyota/Lexus engines don't normally crap out like yours did although I remember a thread on a Sienna forum about the 3.5 liter engine in a new 2014 or 2015 Sienna locking up within a day or two after the purchase.

I assume that you have contacted a Lexus dealer.