I’m looking forward to hearing your impressions about the driving experience with a fresh engine, and all the extras. Great thread.
ih8 scholar asks, ye shall receive.
Perhaps a bit premature to share, but I just performed my first break-in oil change at 520 miles flushing out 5w-30 OEM Toyota conventional for same spec Walmart special (Valvoline synthetic blend). So far, so good. No sediments in oil observed. Zero oil loss which is welcomed as I honestly got sick and tired of carrying around a quart or two. 13.3 mpg using regular gas, on 37s/4.88, LA congested roads. That's about a ~.8-1 mpg improvement over the og engine guzzling premium Chevron/Shell/76.
Q: Would I do the new OEM long block proj all over again?
A: Absolutely. I can tell in the past 50 miles or so the engine feels more languid and smoother to apply power. I'm hoping the 4.5L continues to stretch its Bambi legs as I take it easy to the next 1.5K/5K mile oil change intervals. Thereafter, I'll switch to the ubiquitous 5w-30 Mobil full synthetic.
Q: What are some things you'd do differently if mulligan?
A: I'd make sure to tell the machine shop assembler or whoever's working on the engine to take special care to clean up the iron block area that's covered by the timing chain cover. With a new OEM short block, there's a small chance you may have some casting debris, tiny iron bits, that may find itself swimming between the crank gear, oil pump gear and power steering pump vane gear (44316-60020). Even the slightest nick on these gears of any type may make an incredible noise that beggars belief. I didn't realize through all my hours pouring over Toyota engine diagrams that the power steering pump vane gear mates with the other critical engine gears and it makes sense since it's technically an ancillary part. IMHO, it's best practice to match new for new so make sure you get all new gears (3 of them in rotation) to go with your all new Toyota beautiful long block.
Only other thing is order parts all at once from a USA parts counter. I didn't have a comprehensive list I could reference like this thread. Now I know if I were to do it again I can do it one stop shop. There was no part as I can recall that I ordered from the Middle East that wasn't available via Toyota USA. I like to support my local Toyota parts peeps as I value the relationships built f2f.
Q: What's your most pleasing observation post-rebuild?
A: If not the engine feel/perf over the fullness of time, I'd say it's hands down the new power steering box. The old box was still tight for a 25 year old, but I could feel demonstrably improved tightness in steering motion off center with the new box. I know the FSM allows for some degree of slack off center, but the best way I can describe the change is there's more resistance even in the FSM prescribed margins if that makes any sense. There's no loose steering motion any place in cycling through the steering operation. The steering box was the last mile as epilogue to Delta 4 arms, all new OEM suspension rubbers and tie rods.
Q: If you wanted to find areas where you could reduce spend, what does that look like?
A: If I had a trustworthy 1FZ-FE assembler, I would reuse the og short block ($3500+). I'd reuse/refresh rather than replace fuel injectors ($900). I would consider reusing the cam shafts ($1K). I'd refresh the steering box, but then there's nothing like a new OEM box (net $1K). There's $5-6K right there you can shave off from a completely new OEM block and still have a delightful powerplant.
Anything else?
Don't forget the igniter and coil (89621-26010 / 19080-66010). I wish I nabbed a Toyota OEM reman transmission a few years ago when it was still available. That would've been dreamy to mate it to my new engine.
All the new OEM body mounts and related parts are still gathering dust in storage. I didn't get around to it.
I hope this helps!