So I ordered the lash adjusters from EngineTech on the research that they would be the larger hole. For sure the 3mm hole is larger than OEM original.

Will compare when into teardown but the hole can't get much larger than the EngineTech ones I received.

FYI: EngineTech

Part is L-6000


92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles