Preventative Maintenance

[shastatodd]

i read (somewhere) there is a timing chain tensioner adjustment that should be done at 100K. comments?

i have 100,800 miles on my 09 liftback now. about 60% of that is highway driving. i have done nothing but change the synthetic oil every 5k, one set of tires and of course fuel... which, averaging 45 mpg has not been much!

i think i should change the manual transmission oil, coolant and spark plugs. comments?

l love this car.

[nookandcrannycar]

Originally Posted by shastatodd

i read (somewhere) there is a timing chain tensioner adjustment that should be done at 100K. comments?

I've never had that done on my 07, and I'm closing in on 300,000 miles.

[jack black]

Originally Posted by nookandcrannycar

I've never had that done on my 07, and I'm closing in on 300,000 miles.

Have you checked valve clearance anytime in the 300,000 miles?

[bronsin]

Originally Posted by nookandcrannycar

I've never had that done on my 07, and I'm closing in on 300,000 miles.

The Yaris has shim under bucket valve adjusters same as on many high performance motorcycle engines. The ones on my ST1100 were still good at 109k miles when I sold it and every other owner I conversed with on the internet reports similiar experience. Thats for a 1.1 liter 90 hp engine.

[tmontague]

Originally Posted by shastatodd

i read (somewhere) there is a timing chain tensioner adjustment that should be done at 100K. comments?

i have 100,800 miles on my 09 liftback now. about 60% of that is highway driving. i have done nothing but change the synthetic oil every 5k, one set of tires and of course fuel... which, averaging 45 mpg has not been much!

i think i should change the manual transmission oil, coolant and spark plugs. comments?

l love this car.

The chain tensioner is self adjusting and generally will not have any problems especially if you're running syn oil on regular 5k change intervals. It stays bathed in oil and cannot become contaminated unless you get sludge build up. I have never heard of any Yaris owners who have 300k+ on their cars having any chain/tensioner issues. If you did you would hear a loud noise in that area due to excess slack on the chain.

I'd recommend changing the plugs, just get any plug that is spec'd for the Yaris, no need to go expensive with them. I'd recommend changing the MTF to GL-4, apparently it shifts smoother than the GL-5 and both are fine for the Yaris as long as it is 75w-90* (someone correct me if I'm wrong here as I'm going off the top of my head). I couldn't find GL-4 in any sotre so next time I change my MTF I'll just pick it up online. I am currently running syn GL-5 MTF which is definitely better on really cold morning shifts than the OEM MTF but I wouldn't say it is substantially smoother.

Coolant flush/change is a good idea. Follow CT's procedurehttp://www.yarisworld.com/forums/showthread.php?t=52876 and you'll be good to go. I opted for the concentrated red long life coolant instead of the pre mixed pricier pink "super" long life. I don't need 50,000km change intervals as I'll likely change coolant out earlier for piece of mind due to the crazy temp changes where I live. The red is spec'd to be changes roughly every 30,000km but that varies according to online sources.