Johnny Dash

Swathdiver, can you contact me. Im in Vero. [email protected]. Lifter issue. Tks.

2015 Silverado 5.3 Engine. 60K miles. Started chirping noise. First little then louder. Becoming more of a tick. Removed all belts. Still have the noise. Sounds like coming from under valve cover toward front on passenger side. So 2 and 4 cylinders. Probably 4. I took valve cover off. All looks right. I took rockers off and push rods out. All looks good. I sprayed carb cleaner in push rod ports. I put back together and treated with MotorMedic products. Then changed oil. Still have the noise. The noise is there until the engine heats up after about 7 minutes of running. Then there is no more noise. You can drive it from then on with no noise. So....the question is WHY? Why is the noise there until engine becomes hot OR oil pressure is increasing? Is it that the heat expands metal and once it expands the lifter operates normal? OR is it that oil pressure builds and it works normal after it gets to proper oil pressure? I can't afford thousands of dollars. Im thinking try to replace the VLOM. Even a used one to see if I can see a change. The next step would be replace the lifters. Ultimately I would remove AFM which allows you to get rid of the AFM lifters. Also there is an oil screen on the VLOM that I have not checked.