Why the water pump went on my 2009 a theory

[bronsin]

Add around 26,000 miles my water pump blew and Toyota replaced it under warranty. This was a few months after I got back from driving to Alaska. I drove 10,400 miles in 16 days. 4000 miles were in the US 6000 in Canada . In Canadado the speed limit is 100 km an hour and having never been there I didn’t dare exceed that. But in the US I went 10 miles over The speed limit which men 85 miles an hour much of the time. The last 1400 miles from Minneapolis to Philly Where driven in about 20 hours from 10 o’clock at night to about five in the afternoon mostly going 85. It was Fourth of July weekend and they were no vacancies.

I wonder if that’s what blew the water pump and if anyone who has replaced the water pump abusived it like I did. :iono:

[tmontague]

I think I'm missing something - what abuse are you talking about? Driving long highway miles is far from abuse, even if you are doing many each day. Abuse would be driving in stop and go traffic in extreme temps or better yet doing track session with your caer that exceed 30mins.

I replaced mine in my 1nz a couple years after I purchased it because it had the tell tale line under the hood. I did this preventatively and installed one with a lifetime warranty.

The wp in my 2zr is the oem one as I didn't see a need to replace it when I swapped my engine and it has handled the abuse very well with no issues.

[bronsin]

Don’t you autocross or something?

[tmontague]

nope, I do open lapping days at the track and hopefully next year time attack events. Regardless, I tend to do about 100-120km on the track in mid summer heat split up into 30-45 min sessions. Not easy on a car

[bronsin]

18 hours at 90% of the redline at 90 degrees plus is pretty extreme too! Maybe that’s why our pumps went! :cry:

Anyone else have some extreme tales of operation?:iono:

[tmontague]

how were you at 90% of the redline for that long?

[IllusionX]

My water pump went at around 56000KM, then I had a leak at around 137000km.

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[bronsin]

Driving from Minneapolis to Philly 1400 miles in one day

[WeeYari]

Our OE water pumps have always been hit or miss for reliability. Forum is full of failure reports occurring at milage which shows no consistency. Ranging from very early failure to, like me, still going strong on original. I have nearly 332,000km on mine and have subjected it to multiple 1,700km in a day trips. You just happen to be one of the unlucky ones.

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[dogsridewith]

Are these mostly replaced due to seals leaking? Any impeller seizures...which would probably make the serpentine belt squeal. (And wasn't there a recent post here somewhere about the impeller coming loose on the shaft?)

[IllusionX]

Are these mostly replaced due to seals leaking? Any impeller seizures...which would probably make the serpentine belt squeal. (And wasn't there a recent post here somewhere about the impeller coming loose on the shaft?) my first one had a bearing failure

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[CoryM]

I'd guess it comes down to who has had their belts changed or even just R&Red. It's easy to over-tighten the belt and put abnormal load on the small water pump bearing.

[IllusionX]

I'd guess it comes down to who has had their belts changed or even just R&Red. It's easy to over-tighten the belt and put abnormal load on the small water pump bearing.Car was 3 years old when the bearing failed and on the original belt, so I don't think this was the issue.

Later pump had a small leak, so I had it replaced at the same time as redoing the seal of the timing chain cover.

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[bronsin]

Are these mostly replaced due to seals leaking? Any impeller seizures...which would probably make the serpentine belt squeal. (And wasn't there a recent post here somewhere about the impeller coming loose on the shaft?)

Mine leaked for about three months before it was fixed. It might’ve leaked a cup a month. Classic water pump failure involves massive leak very quickly. I’ve never never heard of a loose impeller. Water pump failure used to mean a loose shaft in the bushing. Yaris as failures are not like that.

[bronsin]

I'd guess it comes down to who has had their belts changed or even just R&Red. It's easy to over-tighten the belt and put abnormal load on the small water pump bearing.

That’s another possibility and there’s no belt tensioner to prevent that

[DarkShadowFox]

the engine itself isnt really designed to race in the beginning. try adding a coolant with a higher boil off point and a TRD sport thermometer.

unfortunately you have to get the Sport thermo from japan.

[dogsridewith]

my first one had a bearing failure

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Were you able to hear it and keep driving long enough to fix it before it started to leak or cook the serpentine belt or something?
(I was thanking Chevy 350V8 for original 71 waterpump and alternator that made bearing noise while still working perfectly.)

[dogsridewith]

Car was 3 years old when the bearing failed and on the original belt, so I don't think this was the issue.

Later pump had a small leak, so I had it replaced at the same time as redoing the seal of the timing chain cover.

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But you didn't know how much over-tightened it may have been for the first 3 years.

[IllusionX]

Were you able to hear it and keep driving long enough to fix it before it started to leak or cook the serpentine belt or something?
(I was thanking Chevy 350V8 for original 71 waterpump and alternator that made bearing noise while still working perfectly.)It never leaked I don't think. I had it quickly replaced before it was out of warranty. I was about 4000km shy of running out :)

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[CoryM]

I bought my car when it was 3 years old with under 40,000km, and the belt had some cracks in it already. I left it on for as long as possible because:
-I know the w.pump bearings are weak and didn't want to replace the w.pump.
-I was curious to just how bad a modern belt can get before it breaks.

I replaced the belt a few months ago as I was doing a couple track days in it and didn't want to risk a mechanical issue. I used a good belt, and was as light as possible on belt tension (to the point that I actually had to adjust it a few days later... I am a mechanic and haven't had to re-adjust a belt in years). Car now has 100,000 km, 9yrs, ~100 autoX events, two track days, two days of TSD rally on the OE water pump. I don't think driver abuse is the cause of the failure. Most cars have auto-adjusters on them and belts last much longer than they used to. I think people just don't remember/know how to manually tension belts anymore. Not a poke at anyone, just an observation. I would also expect if everyone looked at their maintenance records there would a correlation between belt replacement (or belt R&R) and w.pump replacement less than a year later.