I’m trying to rebuild a 1971 Toyota 1F 3.9 liter L6 for my FJ40 Landcruiser. The engine was in running condition with 180k original miles @ disassembly. The block was cleaned, bored .020, crank turned .010 under (I haven’t dropped it), replaced cam bearings for new cam and lifters. This engine is very similar to the old 235 Chevy and uses shims between block and bearing caps, which I reinstalled in same locations. All machine work was down professionally, but by 2 different shops. we only have one Crankshaft grinder in the Tampa Bay area. I’ve gotten no further than test fitting the crank and new .010 mains and I can barely turn it with bearings properly placed, lubricated and sequentially torqued bolts per the manual. I have removed caps, turned crank and measured run out on all 4 MB journals with fixed dial indicator and miked journals at 4 positions and gauged thrust clearance. I don’t have a bore gauge and I imagine bearing Inside diameter must the problem. I have plasti-gauged the journals at 1 position and seem to be in tolerance but know this motor would lock up if fully assembled. To ad insult to injury, no reputable shop will build it for me, regardless of how well organized all parts have cleaned bagged and sorted. Like so many others, I’ve got a ton tied up in machining costs and parts and can’t blow this up. This ain’t my first rebuild but sure feels like it. Beyond dropping a small block V8 in it, what would suggest if this mess was tying up your garage?
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