Hmm my water pump failed again!!!! Could it be the pulley?!?! - Toyota Yaris Forums

YarisSedan · 09-26-2009, 05:15 PM

Okay so i went out this morning to check the tightness of the belt. When i installed the pulley before i marked the position of the altenator with white out. So the tightness of the belt is the same as the factory installed when i was done. So assume from factory it was isntalled with the correct tightness that would not be the culprit of the original water pump failure.

I have put on about 1k miles since it was repaired previousely after the just put in a new water pump and failed again. This time i look at it the mark i made is still there and it is tighter than what is marked. I did the pinch test and the belt is pretty tight. Not insanely tight but is tighter than it should. So i would attribute the undamped pulley compounded with the overtightend belt causing it to fail much more rapidly this time.

To me that can be the only explination. I have a feeling if the factory pulley was ont he even with a overtightend belt it woudlnt have failed at 1k miles. But more like 50k or later.

I do know overtightend belts cause things such as bearings to faull preamaturely but not at only 1 month after it has been done. Unless superman was doing work on the car and there was no belt deflection at all then even then within amonth still seems kinda fast.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Water Pump issue, after taking in for Recall	GeneralDon7	General Yaris / Vitz Discussion	34	05-27-2012 09:04 PM
Yaris Fuel Pump	HTM Yaris	General Yaris / Vitz Discussion	12	03-22-2012 04:34 AM
Water pump belt and pulley - replaced at 36,000mi	cleong	DIY / Maintenance / Service	3	03-06-2009 01:12 AM
bye bye water pump	cali yaris	Performance Modifications	29	01-03-2009 06:06 PM

09-26-2009, 05:15 PM	#11
YarisSedan Drives: 08 Yaris Sedan Join Date: Oct 2008 Location: California - Bay Area Posts: 2,773	Okay so i went out this morning to check the tightness of the belt. When i installed the pulley before i marked the position of the altenator with white out. So the tightness of the belt is the same as the factory installed when i was done. So assume from factory it was isntalled with the correct tightness that would not be the culprit of the original water pump failure. I have put on about 1k miles since it was repaired previousely after the just put in a new water pump and failed again. This time i look at it the mark i made is still there and it is tighter than what is marked. I did the pinch test and the belt is pretty tight. Not insanely tight but is tighter than it should. So i would attribute the undamped pulley compounded with the overtightend belt causing it to fail much more rapidly this time. To me that can be the only explination. I have a feeling if the factory pulley was ont he even with a overtightend belt it woudlnt have failed at 1k miles. But more like 50k or later. I do know overtightend belts cause things such as bearings to faull preamaturely but not at only 1 month after it has been done. Unless superman was doing work on the car and there was no belt deflection at all then even then within amonth still seems kinda fast.