I have a 07 tl with 113k miles and I have this knock noise coming from the passenger side of the motor.. it only does it when the car is warm and that's sometimes as well...what can it be? I hear it can be my lifters that are sticking or something....this is a new car to me and haven't really looked at it..wondering if anyone ever and this problem and know of a solution..thank you

 

has the the timing belt/timing belt tensioner been replaced?

 

Yes previous owner has done it at 100k