Just a heads-up: it you supply your own parts, then the mechanic usually won't back them if there is a failure.

I planned to replace the CV joints on a vehicle, but didn't have the right tools. So, I brought the parts to a local mechanic who was willing to use them. the sealing surface on the new CV joint was bad, and they started leaking transmission fluid within a couple weeks. Because I supplied the parts, they didn't warranty for a part defect. I ended up paying the labor twice.

Two answer your question, I'd hold off a year or two before replacing the timing belt.

 

The recommended replacement in my 2005 manual is 108 months or 90,000 miles. By my calculations that is 9 years not 6. Of course you realize The 3.3 engine is an interference engine and if the belt breaks it will cause a lot of damage, so you take your chances...or be overly cautious.

 

I would also wait. You can go another 25k miles especially if your engine is not driven in a a severe duty type way or environment. Otherwise early replacement is somewhat of a waste of money.

Plugs can go a long, long time before needing replacement. There is no reason to change them with the timing belt nor does the belt being off lend better plug access so I would just replace them when recommended by the owners manual.

 

Hi,
Thanks for your input. I bought my van used so it did not come with the recommended service interval manual. The local dealers here are saying 6 years/90k miles, whichever comes first for timing belt replacement, and that's what I'd heard online previously, but I guess it's not what the manufacturer actually recommends. Thanks again!

 

Interestingly, they don't suggest a timing belt change on my vehicle. That's out to 120,000 miles.

Go out to Toyota.com. At the bottom of the screen you'll see a button For Owners. Register with Toyota and you'll have access to all the manuals that would have come with your vehicle as well as any Toyota service that was performed on it, instructional videos and a listing of all your dashboard indicators. At least that's what's on my page.

 

Thanks! The advice given here saved me almost $1000. I will wait another couple years and get the TB/WP replaced around 90k miles in that case.