So are you saying you dont think its the lifters? Thats what it sounds like to me, but I am not 100% certain. A frozen valve maybe? I have no experience with 7M's I work on 22R's and 4afe's both of which are carburated, and although the 4afe is OHC I never run it low, and I always change the oil. So what I am saying is I dont know, if you have a more specific tip that would help immensly.
Thanks,
Chris
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