Timing belt or chain - Toyota Prius Forum : Prius Online Toyota Forums
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#1 (permalink) Old 07-19-2005, 10:09 PM
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Default Timing belt or chain

I have a 2005 Prius with 2,000 miles. For the future, I am wondering about when or if the timing belt or chain (assuming a Prius has one) gets replaced. In the maintenance guide, I do not see this mentioned up to 120,000 miles.

The Toyota dealer's guide states to replace it at 60,000; their guide however seems generic to all Toyotas.
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#2 (permalink) Old 07-19-2005, 11:02 PM
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I'm sure they'd be glad to replace it for you, but I do believe it is a chain.
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#3 (permalink) Old 07-19-2005, 11:22 PM
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Still hoping someone knows if and when the timing chain needs replacing.
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#4 (permalink) Old 07-20-2005, 12:40 AM
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according to my husband, it's (he's pretty sure) a chain, and should be able to go 100K without replacing, if not longer.

(he's a dealer tech)
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#5 (permalink) Old 07-20-2005, 08:18 AM
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I seem to recall that belts (even timing belts) used to be rated at 100,000 miles.

However, as warranty periods got longer, the manufacturers lowered that value to 60,000. They did this because they didn't want the belts breaking during the warranty period because when a timing belt goes it can cause damage to the valves. Damage they would have to pay to repair.

It's the same with oil and everything else. They reduce their risk by making the car owner foot the bill for additional maintenance.

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#6 (permalink) Old 07-20-2005, 09:19 AM
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Well, it took me about twenty minutes of searching in the service manuals (it's not listed in the index but is in the valve system "also not indexed") There definately is a "timing chain" and it's life should be a lot longer than that of any belt as it rides in a lubricant bath.
On both my Plymouth Voyagers which I relied upon for two roundtrips a year between Texas and Massachusetts for 16 years I attempted to do some preventive maintanence so as to not ever have a problem on the road. There was no specified period for timing belt replacement but my local service manager told me to probably expect to have some timing problems (engine not running right) between 108 and 110 thousand miles. Engine will start slipping out of time. He had never heard of a total failure and any internal damage being caused. This on the small 3 L Mitsibusahi V6 and also the Chrysler 3.3 V6. That was enough for me to have them both changed at about 100,000 miles.
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#7 (permalink) Old 07-20-2005, 10:20 AM
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I think the belt on my Chevy Spectrum broke around 185k miles. Records in the glove box indicated the original owner had it changed around 75k...

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#8 (permalink) Old 07-20-2005, 03:22 PM
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The Prius has a timing chain. No timing belt.

here
( What maintenance is required on my timing belt? )
and
here
( Does my vehicle have a timing belt or a timing chain? )

to quote from the first link on timing belts:
"If your vehicle is equipped with a timing chain rather than a timing belt, there is no prescribed replacement interval. "

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#9 (permalink) Old 07-20-2005, 06:48 PM
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My Prius Certified techs tells me that , Prius timing chain=for life !

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#10 (permalink) Old 07-20-2005, 10:13 PM
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Thanks to all for the info! I guess the key is that indeed since the Prius has a timing chain, that therefore there is no prescribed interval for replacement and that would be the answer to why it is not listed as a maintenance item in the Prius maintenance guide.

I would probably consider replacing it at 90,000 to be on the safe side as I'm aware of the engine damage a busted chain or belt can cause.
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