Hello everyone,
Is the engine in my 2018 RC 350 FSport (the 2GR-FKS) an interference engine?
Thanks,
Nicholas.

 

I could not find specific design info in TIS o online with a quick search. I do know the -FKS is the use of VVT-iw and VVt-i to accomplish the Atkinson cycle, in that case non-interference might be used but the compression ratio is also 11.8:1 so its a guess to me. There is a list here that I found and the 3.5L is not listed as interference but that is the internet and it doesn't specify which Lexus 3.5L engine (http://yourcarangel.com/2014/07/inte...complete-list/). You will likely need to contact a company like RRRacing that does SCs for them or another performance outfit that has worked with the engines or maybe a machine shop that has rebuilt/built the engines and would have more info.