Mustang10sc
Junior Member
I have a 2010 Mustang 3valve. There was a rattle sound when I would start the engine so I went ahead and purchased a timing set, also there was a faint tapping sound that would come and go. I installed the new timing set and my car ran better than it had when I purchased it. The faint tapping sound came back a couple thousand miles later and increasingly got worse. It’s coming from the rear passenger side head. I took it to a shop and they said it was the roller followers and lash adjusters. They installed them and the tapping is still present. They told me they thought it was piston slap but I read that piston slap decreases when the engine is warm. My car doesn’t tap at idle, it starts around 1700 rpm and increases with the rpms. It’s a strange sounding tick. They did show me a picture of the cam journals and they were worn a good bit. Would worn out cam journals cause such a sound? I’ve spent hours reading and watching videos and the only video that I saw that sounded really similar to my engine, was on a coyote and the imrcv flaps were loose in the intake, and rattling. Is this a possibility? I change the oil like I’m supposed to but I bought the car with 155000 miles on it and now it has 175000. I don’t know how well it was maintained before I purchased it, but the heads are very clean looking. Also I’m not getting any codes. Thanks for any help, this is my daily driver and I really need to get it fixed very soon.