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I have a 2013 Hyundai genesis coupe 3.8L track edition.... bought it from a used car dealer.... in 11.19.19 first oil change at firestone..2.16.20.1 day later knocking noise like a hammer banging on the engine .. had it towed to Samsone Hyundai ... damage pistons ....working through American auto group warranty..(sucks). still waiting on cause of engine failure... will update as soon as I find anything else.
 

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If it's piston damage then it's likely a valve hit the head.

Likely timing chain wasn't replaced, or valve float.
 

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do you mean a valve hit the piston ? or valve head broke off & then hits piston and head? I am very interested to hear how American Auto group treats you.
 

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do you mean a valve hit the piston ? or valve head broke off & then hits piston and head? I am very interested to hear how American Auto group treats you.
Sorry, meant valve hitting the piston
 

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I have a 2013 Hyundai genesis coupe 3.8L track edition.... bought it from a used car dealer.... in 11.19.19 first oil change at firestone..2.16.20.1 day later knocking noise like a hammer banging on the engine .. had it towed to Samsone Hyundai ... damage pistons ....working through American auto group warranty..(sucks). still waiting on cause of engine failure... will update as soon as I find anything else.
this may help or not.Do you think someone at firestone could have driven your car hot rodding or somehow w/o oil? I worked at penneys auto when a kid & saw that happen TWICE 1 guy changing oil gets distracted, someone else drives car before oil put in ,thinking its done. customer leaves w/car, motor locks up we go get car no oil. drag w/ chain till breaks loose. customer leaves w/ car ,main bearings make plenty noise. we were just kids & found this funny however if its your car !!
 
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