So I did the HG , new water pump and thermostat. No longer getting over pressurization in coolant overflow and back to normal coolant temps during driving. BUT this motor is worn out and showed signs of neglect. Cylinder bores had shiny areas . All piston tops were ok, and traveled to top of cylinders evenly. So I'm researching options. Brand new short block. Used long block. Local sourced long block vs JDM long block? I'm in Maine USA so far away from California. The body, paint and interior all in very good condition.
How does it run? I would not change it unless it's burning lots of oil or it's still rattling. A dealer would do a new short block assuming the head was flat. But having them do it is ridiculous. But if you can do it you would end up with a reliable engine. I would have someone like Hybrid Pit ship me a rebuilt engine. For cost reasons I might go JDM but you could get an older 2010-14 engine with the low tension rings or you could get a used in Japan 2018-21 engine. But there is no way to id the year.
What’s the miles? Rate of oil consumption? last link in my signature is 3rd gen engine section, from repair manual. (On a phone turn it landscape to see signatures) this might be of use, if only as an option, and to get the short block part no: https://www.amayama.com/en/part/toyota/1140037140 Amayama employs VIN and/or frame no to confirm compatibility, both are on drivers door decal. according to The Car Care Nut, any Toyota-sold short block will have the revised pistons and rings now. attached has part nos for (revised) pistons/rings, head bolts, and gasket kit.
