Quote:
Originally Posted by TheDurk
^^^^Good post. I'd just add fuel filter and the often neglected PCV valve. Toyota says fuel filter is lifetime but I think 150k IS lifetime for them. The maintenance book stops at 120k. You also need to be sure the timing belt and water pump have been done. If they haven't been done, at this age and mileage you also want to do both idlers, thermostat, rad hoses, aux. belts and the top and bottom rad hoses.
I feel any decent GL-5 is OK for TC and diffs, but if you want to use Redline it won't hurt anything other than your wallet. I prefer to spend less on each change and then change more often.
Please try and rebuild that alt. if it needs it. Factory Denso's are far better than re-mans/aftermarket.
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Definitely the fuel filter and PCV valve; I over-maintain my truck and change the fuel filter every few years, and have never had a fuel problem at all. I also replaced the PCV on my truck fairly recently; the old one was still fine, but I figured, at $7 for the OEM piece, why not. Make sure to get the one from the dealer, though, because the aftermarket ones are plastic and can snap.
I forgot about timing belt and water pump (I have a 3RZ 4cyl, so I have a timing chain that lasts far longer than the belt), but if you're due for those, definitely do that as well.
Lots of rubber hoses will need to be replaced at this mileage; I just spent nearly $100 in misc. vacuum lines this past week as I found numerous rotten ones while installing my turbo. I also did my radiator hoses within the last couple years, and they definitely needed replacement as well; the belts I do every few years, as they are pretty cheap and replacing them proactively is insurance for me.
My dad had to do a T-stat on his T-100; not a big deal, and again, cheap insurance. I have not touched idlers on my engine, and I know my friend with a Tacoma (5VZ engine) has not either and neither of us have had any issues. If they are relatively inexpensive, though, you might as well do those too while you have the truck apart.
If you have the intake off, you might want to clean the throttle body and mass air flow sensor as well. Also, check the throttle and trans kickdown cables, and adjust them if there is too much slack. That definitely needed to be done on my truck, as the throttle cable stretched after so many miles. Replace your air filter while you are at it, if necessary.
All of these things should keep you busy while you're on break. Good luck!