Gerb

Hey, is there a scheduled maintenance when to change the timing chain on a 2006 is350? Any other major maintenance I have to worry about past 110k km?

NikonGuy

iTrader: (1)

Timing chain is not a wear item. You never have to change it

got556

Eh I know you shouldn't have to change it, but on T4R (4 runner forums) I can remember a couple V6 guys having higher mileage on their 4th gens and the chain showing signs of severely loosening. I had a V8 Limited 4th gen so I had to change timing belt every 90K miles. OP, you should have nothing to worry about for a long time, but if your water pump or something else needs changed out during a scheduled maintenance service I would go ahead and have them check the slack on the timing chain as they will be in that area already. But as the poster above said, you should be gtg.

Jeff Lange

iTrader: (1)

They're not regular maintenance items, so there is no set mileage when they should be replaced, it's something that would be looked at if there were concerns and/or you were already in there and you had very high mileage or something along those lines.

There are 3 chains.

Jeff

604GSE21

i know for sure u don't have to change it because its like your bicycle chain unless it breaks don't touch it... but on the hand i did heard b4 that it needs to be re-tightened cuz it stretches or does get little bit loose over time but it is not so loose that it will damage anything though...

Gerb

Does the is350 have a timing belt? Is there anything about that normally fails after 100k km?


How about waterpump?

Serifiyah

The IS350 has a timing chain. The water pump has been known to fail prematurely, so inspect for leaks and/or noises occasionally.

Gville350

iTrader: (10)

The timing chain is lubed by engine oil, so it'll wear minimally. Like was said, no set mileage and it technically a "lifetime" item; but we all know calling it such a thing is wrong because there are failures I'm sure out there.

NotADood

Lexus Master Tech here,

I've been with Lexus since 2006 when the timing chain engines first came out. In that time, I have never seen, or even heard of a timing chain needing to be replaced on any of the engines that Toyota makes with a chain due to wear and tear.

Gerb

Thanks for the respnoses guys

firelikeiy

Rule of thumb that I have always heard is 300K miles on a chain.

NikonGuy

iTrader: (1)

When your car hits 300k probably not worth it to change it out. Drive until it dies

B16da9

iTrader: (7)

Jeff, are the chain guides an issue with these cars? I remember on my dads old 22RE engine we had to change the guides as the broke and where slapping around.

Jeff Lange

iTrader: (1)

The older engines (22R's and similar) did indeed have guide issues, which usually ended up wearing through the timing cover and so on. Haven't seen anything like that on any of the modern Toyota chain-equipped engines though, even with high mileage.

Jeff

Gville350

iTrader: (10)

^Great to hear!