Spark Plugs, etc.
First of all, you are correct about the automatic transmission fluid on the '05 SR5. It is a sealed system (no dipstick or external access to it) filled with a synthetic fluid that is very expensive and (supposedly) does not need to be replaced unless it gets overheated or you have towed things frequently.
I do not know if it is true, but there is supposed to be a sensor of some sort that will alert you if the transmission fluid needs serviced. Perhaps it goes off if it detects a certain amount of heat, stress or wear.....I just don't know quite how it works.
As for the timing chain, you are correct again. I know the 4.0 V-6 has it, but I am not sure if the 4.7-liter V-8 still uses a belt. I know someone on here will know! The chain should last the life of the engine & you should never have to mess with it.
As for spark plugs, I know that most cars now use the platinum-tipped plugs that go for 100,000+ miles before needing replacement. Heck, even my 2002 Nissan Sentra has them. I only have 10,000 miles on my 4Runner, so I have yet to give any thought to changing its plugs, although I will take a glance at the owner's manual or ask the stealership the next time I am there for my state inspection (which will probably Monday morning).
I don't know why Toyota would not use them on such a high-cost vehicle as the 4Runner, but perhaps there is a good reason why they did not. Maybe you could install platinum ones at 30k if you decide to replace them at that time.
EDIT: I somehow new that 'sharp4runr' would chime in with an answer -- as he always does.
:awais:
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I'll probably just change them myslef when it's due. Any pointers on doing that on the V6? I've changed plenty of plugs before, just not on this engine. Any tips?
