GM 5.3 AFM Lifter Replacement Kit. Fel Pro Quality Gaskets, Head Bolts, Guides, Lifters

Great kit all you need to replace your old stuck AFM lifters. If your not replacing the vlom make sure to inspect the gasket for blown out areas at the ports. Most of these gaskets are riveted on the manifold and cant be replaced by the diy. Also not in the kit. Replace the oil pressure sensor filter(also not in the kit) and check for debris blocking oil to the manifold. If your warm oil pressure is below 22 psi youll need a new pump or at least o-rings. Low oil pressure is the primary cause of AFM lifter failure, since oil pressure is what releases the inner plunger of the lifter to deactivate the valve.

Bought this kit to replace a stuck lifter on 3/1/22. Lasted about a year, now having the same issue again. Money doesn't grow on trees and to spend $600 on parts and another $800 on labor to fix a problem, now to have to do it all over again is not worth it. Don't waste your money.

I like that it was a felpro gasket set and bolts I put the truck together and ran it for 2 minutes somthing didn’t seem right like an intake and exhaust valve was opening at the same time so I took it apart bought the same parts from the parts store and had 40 bucks less in it then this kit put the motor back together the same was as before just with melling lifters and a new gasket set runs great

Save your money and buy Melling lifters and OEM gaskets and seals.. After breaking the cylinder heads down and recleaning everything, after I installed the lifters included with the kit and put everything back together, the lifters would not pump. The lifters were soaked in clean oil for 3 weeks.

Have had these lifters in my truck for about a year now. Had to pull it apart twice because the first set they sent wouldn't pump up. Now my oil consumption is up.