Join Date: Jan 2007
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I am curious how many garages are using the correct inspection and diagnostic steps before just replacing the water pump?
There is a T-SB-0117-11 that walks through the appearance of coolant outside the system near the weep hold, pulley and hood. Its a good read and basically indicates that the weep hole is also for temporary blockages between the mating ring and seal ring. It will result in weeping until the blockage is resolved and the mechanical seal is returned. Meaning that quite often there will be residue on this pump assembly in some form or fashion.
When I did my coolant change last month, I had hood sling residue and a fair amount of build up on the weep hole. I was expecting to have to replace the WP for sure. But what was a lot to me only resulted in "light coolant deposits" per the document. I have no consumption of coolant, no squealing to date...so only long term time will tell.
I had some black debris that I did flush out of the system over quite a few gallons. I am curious if I flushed out that blockage or if moving to the Toyota Red altered something? Its nothing Ill be able to prove it one way or the other.
But I am curious if water pumps are being replaced prematurely in some of these vehicles just because there is some presence of "coolant deposits".
2007 Rav 4 2AZ-FE (Auto )
1991 MR2 3S-GTE (Gen III, 5 Spd )
2011 Hyundai Sonata Limited (Auto )