I tried using the release method , no luck , ended up pulling R side head to replace the lifters. I am just wondering what's the best , most reliable brand to go with? #4 intake Lifter was broken, 82K miles on it, cup that holds the spring on broke off at it's base. I am probably going with GM 12698946 lifters, seems to be updated part # from my original. Most likely I am going to buy HPTuner to turn off the AFM. Still on the fence about replacing the non AFM lifters, probably will just because I'm there. Too much work for my old arse to keep doin over and over, been wrenchin for 40yrs....lol
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Sorry for the late delay, I got a new phone and it hasn't been giving me notifications. Anyway, that's no excuse on with the topic...
Replacing the lifter doesn't solve the lifter failure problem, the lifters fail because they lack oil pressure or are getting oil pressure when they shouldn't causing them to bind. In your particular case I'm guessing this is a direct injected motor. This means you are most likely getting pressure when you shouldn't. If that's the case because the VLOM has gone bad, then you will want to put my VLOM plug in and turn the system off in the tune permanently. With the exception of California that is of question recently, It's better to turn off the system in the tune. They won't be checking the actual tune file. It seems there is a recent change to California rules that may threaten this theory though. I have a couple of people who are trying to work on finding out if this will affect the folks in California. Hopefully you're not one that is from California. If you are, what are you doing? Run like hell!!!