This discussion came up in a discussion I was having on the Frontier forum, and I'm wondering if any of you guys are rebuilding (cleaning, inspecting, and refilling) your valve lifters. I'm building several of these VG motors right now, and it isn't cost effective to by new valve lifters for each engine, each time. Some of my heads only have about 50K-65K miles on them, and likely no reason to bother with addressing the lifters, but other heads have 150K-200K miles and it was noted that the lifters begin to get sticky.
I began wondering what makes them "sticky" in the first place. Could it be that the oil inside them (certainly below the check-valve assembly) could be old and gunky (due to not cycling out regularly), and thus opening them up, cleaning them, and replacing the oil with new oil would refresh the lifter for another 150K-200K miles?
What are your thoughts/experiences?
I began wondering what makes them "sticky" in the first place. Could it be that the oil inside them (certainly below the check-valve assembly) could be old and gunky (due to not cycling out regularly), and thus opening them up, cleaning them, and replacing the oil with new oil would refresh the lifter for another 150K-200K miles?
What are your thoughts/experiences?
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