When to change Timing Chain?
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Pole Position
Joined: Jun 2014
Posts: 327
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From: Vancouver
When to change Timing Chain?
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?
Rookie
Joined: Sep 2014
Posts: 87
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From: Indiana
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.
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
There are 3 chains.
Jeff
Instructor
Joined: Apr 2013
Posts: 1,123
Likes: 551
From: Vancouver, BC
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...
Driver
Joined: Mar 2013
Posts: 191
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From: CA
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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.
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Driver
Joined: Jun 2013
Posts: 163
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From: Ga
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.
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.
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
There are 3 chains.
Jeff
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
Jeff
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