Not sure I'm writing in the correct forum here but, after reading all of the above, I want to clarify something. So it's my hubby's truck and his timing belt broke last week Towed it to the shop and had the repair done. When we picked it up it turns out the valves are bent. It no longer runs the same, not as much power & he can't really get above 30mph. So, he has to avoid freeways. It really sucks as the truck is pretty much the family's bread & butter for his garden business. I just don't understand how this is happening if his model is a non-interfering???