Hmm my water pump failed again!!!! Could it be the pulley?!?!

[Astroman]

If that's the case, then why is this the first problem with the water pump with hundreds of thousands (if not a million) miles by everyone using the pulleys? Redlining the crap out of a car is more likely to cause stuff to break than a pulley.

[Tamago]

Originally Posted by Astroman

If that's the case, then why is this the first problem with the water pump with hundreds of thousands (if not a million) miles by everyone using the pulleys? Redlining the crap out of a car is more likely to cause stuff to break than a pulley.

if you say so.



the ratio of water pump failures stock vs pulley tells the tale..

[advocate]

Originally Posted by Tamago

if you say so.



the ratio of water pump failures stock vs pulley tells the tale..

There are definitely quite a few people who've had water pump failures with the aftermarket pulleys.

[Astroman]

The only water pump issues I've ever had was with the ol' '71 Ford. Any mechanics you could take it to that might be able to chime in? I just find it odd I've put over 50k miles with a full pulley setup on (not overdrive) without issue. Time will tell I suppose.

[Astroman]

What about the ratio of people who redline their engine? Again that is also the other factor. And if the shop didn't install the last one correctly that could lead to premature water pump failure.

It might be worth it to run with the stock pulley for a while too, since they're in there anyway it shouldn't be a big deal.

[Tamago]

Originally Posted by Astroman

What about the ratio of people who redline their engine? Again that is also the other factor. And if the shop didn't install the last one correctly that could lead to premature water pump failure.

i've redlined my xA every day for 70Xthousand miles and never had a water pump (or any other) failure. stock pullies. redlining has nothing to do with it.

[AlexNet0]

Originally Posted by Tamago

i've redlined my xA every day for 70Xthousand miles and never had a water pump (or any other) failure. stock pullies. redlining has nothing to do with it.

^+1

74k miles, redline a lot, stock pullies

[supmet]

Originally Posted by Tamago

i've redlined my xA every day for 70Xthousand miles and never had a water pump (or any other) failure. stock pullies. redlining has nothing to do with it.

trini_performance has beat the hell out of his yaris for 350,000+ miles and is on the original water pump

[posaunemeister]

The denial comes from ignoring the blatant admission of redlining the car everyday. Redlining DAILY will definitely do some damage under the hood. If your car was designed to cruise at 6/7/8 RPMs, then there wouldn't be a red line, period. I'm sure you've been doing some serious damage to your engine, especially considering that you most likely have stock (economic) internals. I don't see how anyone can argue in favor of redlining and against an aluminum pulley that is only 10% less than the stock pulley in circumference!

[1NZYaris1]

Originally Posted by Tamago

if you say so.



the ratio of water pump failures stock vs pulley tells the tale..

Could it be due to people over tightenning the BELTS

[fmicle]

Originally Posted by Tamago

the ratio of water pump failures stock vs pulley tells the tale..

I beg to differ. This is a typical mistake people make, just because there is a correlation between A and B it doesn't mean A caused B or vice versa.

Let me explain with an example: studies show that households with more books have smarter kids (correlation between books and kids), so a mayor in Illinois thought he'll simply give away free books and make kids smarter. Needless to say, the plan didn't work. Because it's not the number of books that cause the kids to be smart, it's their parents' education, status, emphasis on school, etc. And those families are likely to have more books to begin with. So, there is another parameter C that causes both A and B to go together.

Back to our situation: people with aftermarket pulleys have more water pump failures than the ones driving stock (that's the correlation). So some people incorrectly infer that the pulleys must cause the failure.

Imagine this: people who install aftermarket parts and tune their cars are more likely to drive their cars more aggressively, therefore putting more stress on their parts than those driving stock (grandma, grandpa, uncle Jimmy).

Just remember the basic principle: correlation does not imply causation. For more details check it out on Wikipedia: Correlation does not imply causation

[PHXDEMON]

Originally Posted by fmicle

I beg to differ. This is a typical mistake people make, just because there is a correlation between A and B it doesn't mean A caused B or vice versa.

Let me explain with an example: studies show that households with more books have smarter kids (correlation between books and kids), so a mayor in Illinois thought he'll simply give away free books and make kids smarter. Needless to say, the plan didn't work. Because it's not the number of books that cause the kids to be smart, it's their parents' education, status, emphasis on school, etc. And those families are likely to have more books to begin with. So, there is another parameter C that causes both A and B to go together.

Back to our situation: people with aftermarket pulleys have more water pump failures than the ones driving stock (that's the correlation). So some people incorrectly infer that the pulleys must cause the failure.

Imagine this: people who install aftermarket parts and tune their cars are more likely to drive their cars more aggressively, therefore putting more stress on their parts than those driving stock (grandma, grandpa, uncle Jimmy).

Just remember the basic principle: correlation does not imply causation. For more details check it out on Wikipedia: Correlation does not imply causation

Wisdom