i have a 4L 06 S .I bought at a auto lot it is in pristine condition . after 5 k miles in 3 mo the secondary timing chains shoes wore out. I had 90 day warranty . I however bought a entire timing kit with solenoids and water pump. When it was started the drivers side upper solenoid had a leak in the casting . we put old one back on it started warmed up checked all fluids it was or seemed ready . I drove it 2 miles at low speed and it developed a tick on left and right side of motor . like a valve or push rod noise . mechanic is stumped. Took apart and no problems appear to us Help...