What is the filter screen on a GM valve lifter?
The screen (see illustration) is actually a filter for the valve lifters on those GM applications equipped with AFM. The purpose of the filter screen is to help control contamination that can affect the AFM hydraulic system by filtering the oil that flows through the valve lifter oil manifold and its related solenoids.
Is there a problem with my valve lifter?
Dod delete is the only sure fire way to not have a problem. Looks similar same part number but.. This is my first time replacing this piece, my 2008 trailblazer v8 5.3 was making a loud metalic noise inside the engine bay. I checked everything and found out was this vlom also my oil pressure sensor gauge was bit low.
How to replace a GM 5.3 valve lifter?
Gm 5.3 AFM Lifter Replacement Kit. Head Gasket Set, Head Bolts, Full Lifter Set. GM 5.3 AFM Lifter Replacement Kit. Fel Pro Quality Gaskets, Head Bolts, Guides, Lifters GM 5.3 AFM Lifter Replacement Kit. Fel Pro Quality Gaskets, Head Bolts, Guides, Lifters . . . . Dealer Sales Solutions LLC.
Is there an oil screen under the lifter filter?
As I’ve read I have seen a lot of oil pressure issues that end up being the lifter filter or oil screen under the oil pressure switch/sender. Has anyone ever actually removed the intake to clean this or know exactly where’s it’s at and how hard it would be to remove and clean?
The screen (see illustration) is actually a filter for the valve lifters on those GM applications equipped with AFM. The purpose of the filter screen is to help control contamination that can affect the AFM hydraulic system by filtering the oil that flows through the valve lifter oil manifold and its related solenoids.
Where is the AFM on a GM LS lifter?
To control contamination a small replaceable oil filter is located in the VLOM inlet oil passageway. The AFM oil pressure relief valve regulates the oil supplied to the VLOM and is located in the oil pan near the oil filter housing. The AFM system has an operating range from 27 PSI to 66 PSI of oil pressure.
What causes a valve lifter to malfunction?
We have found that most lifter faults are caused by oil pressure issues, or control issues. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly.
As I’ve read I have seen a lot of oil pressure issues that end up being the lifter filter or oil screen under the oil pressure switch/sender. Has anyone ever actually removed the intake to clean this or know exactly where’s it’s at and how hard it would be to remove and clean?