Yes, when vehicle was first purchased it had a flat in one of the cams. They offered an extended warranty only. Would not replace or repair.

maybe someone can help me solve my problem. i have tried lucas and z-max to no success.

the knock is not loud but does concern me very much. if i could fix this before causing alot of damage that i could have prevented that would be very appreciated. i love my truck and run my own home improvement company. i would take it to the shop and have it fixed, but work has not been very good lately. please help if you can. signed worried to death.