Yes

is an interference engine. i couldn't remember which thread this was being discussed in. so i made a new thread. but i wrote lexus about a week ago asking if it's an interference or non-interference engine. i'd read conflicting information on the net. originally, they didn't answer the question. but after i repeated it, they sent this reply:

Thank you for contacting Lexus Customer Satisfaction and for your patience as we further addressed your concern.

The engine in your 2002 SC430 is an interference engine. We hope this is helpful for the general knowledge you were seeking.

We hope your ownership experience with Lexus will continue to reflect the high standards we strive to uphold. Please be assured the Lexus Customer Satisfaction Department has noted your comments. We hope you continue to enjoy Lexus vehicles for many years and miles to come.

If you require further assistance, please respond to this e-mail, or contact Lexus Customer Satisfaction at 1-800-255-3987, Monday through Friday, 5:00 a.m. to 6:00 p.m., or Saturday, 7:00 a.m. to 4:00 p.m., Pacific Time.

Sincerely,

Stefanie Oda
Lexus Customer Satisfaction


what that means for us is that the timing belt service is very important. if it breaks, your engine will essentially be ruined.