Bought online , receiving tomorrow , been reading complete forum for a few days. I have not heard the noise in the engine . I purchased oil filter and fuel filter . The description of problem is makes engine noise once it warms up. I am open to any suggestions to what to check first. I believe the unit may have been idled alot with such low miles. It did have rear a/c that has been removed .I plan to check Harmonic balancer first.