I don't have the expertise and mechanically/electrically skilled as many on this forum. One reason why I'm going to the Cruiser on the Rocks in Silverton this July is to remind everyone what a stock Cruiser still looks like

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From what I witnessed watching the mechanic who came to my home yesterday to do the work, I can attest that it's MUCH easier to swap out the parts for those items when it's all done together. I recommend you get new Toyota parts for these items and replace simultaneously.
- Water pump
- Alternator
- Idler pulley
- Tensioner pulley
- Fan clutch
- Fan clutch pulley housing (bracket fluid coupling)
- Radiator (the Toyota box should have new mounts, cap, peacock valve, etc. included)
- Radiator upper/lower hoses
- Thermostat
- Heater hose tee lines. Mine had 2 sets with 3 hoses each, with the tee included. Each as a set from from Toyota. It was much easier for my mechanic to replace each as a set, instead of doing the hoses and tees separately. I do have a new metal tee that I will most likely take with me on trips. Then, I'll replace the OEM tee in about 50k miles if not before.
- My thermostat had 4 hoses connected to it. I'd replace those as well.
- Mine had 2 coolant hose attached to 2 metal lines near the radiator. I'm only replacing the one that is easier to access.
- I'm replacing a few more coolant-line/by-pass hoses that I could identify on a Toyota diagram.
- Serpentine belt.
- If you want the Toyota self-tensioning clamps for all your hoses, now is the time to get them. I'm replacing all of mine as connected by this job.
There is coolant leaking by the heater hose tees. I replaced the plastic tee with the metal ones 3.5 yrs and 63k miles ago, but not the hoses. The hoses now need to be replaced.
While you're in there, inspect for oil/coolant leaks around the engine block.
Don't forget to use the engine-coolant peacock valves to drain the coolant.
Initially, the Toyota dealer I use for discounted parts gave me a remanufactured radiator. You need to clearly specify you do not want a remanufactured alternator, but a new one. The remanufactured alternator was shown like this on the first invoice:
"27060-38050-84 REMAN ALTE M121"
I did not ask for a remanufactured one. So I had to call after the first invoice was emailed to me and state I want a new one. They changed it.
If you want to do a full tranny fluid flush, now is a good time. You can flush it all out by using the tranny fluid line by the radiator before you change anything, and then use the Toyota refill process after you install the above parts. I made a mess doing a fully tranny fluid change by using the tranny fluid line at the radiator. If you go this route and make a mess, it'll be easier to clean it up.
I record my maintenance on a spreadsheet. It will look very nice on your records, in your head, and on your rig knowing you did everything the same time.