The Melling tech department is finding that customers are experiencing repeat AFM lifter failures. Please carefully review this video to assist when rebuilding an LS engine with a failed AFM lifter. They can be identified by the compressed state of the exterior spring. This indicates an issue with the VLOM manifold assembly. This includes the VLOM filter and the solenoids.
If you are working on a GM LS engine, watch this tech tip video featuring Melling’s tech director Cale Risinger talking about Melling JB-7011 lifters.