The last time my wife took our 2006 Toyota Sienna in for service, the service manager reminded her that the next visit would be the 90,000 mile service and told her that in addition to the belts (timing belt as well as the serpentine belts as called for on the maintenance schedule), the water pump w…

I agree with you that the water pump should last another 90,000 miles until the next timing belt. But, changing out the water pump adds almost nothing to the labor charge when they’re changing out your timing belt. The timing belt drives the water pump. So instead of risking that the water pump l…

Dealers’ (not factory) aggressive-maintenance policies are often money-driven. You should consult 1) All details of your warranty, 2) Your owners-manual, 3) Factory-Service manual. On the last item, I would go to a different dealer, ask to see the Service Manual on the Sienna without telling them …

There is no set maintenance interval on water pumps because there is no reliable indicator of lifespan. All moving parts wear and fail. It’s entirely reasonable to expect a water pump to last 100,000 miles. It’s not as reasonable to expect it to last 200,000. If the you replace the water pump now pr…

Did you ask how much extra the water pump will cost? Sounds like you went to a dealership. There’s no need to take an out-of-warranty car to a dealer for this kind of work. You may find that a good independent non-chain shop can do the 90K service with a water pump for less than the dealer price …

The cost/benefit of replacing the pump with the timing belt became very apparent and from about 1990 on I refused to replace a timing belt unless the customer agreed to the complete package including all timing belts, the tensioner and idler pulleys and the water pump and also the cam and crank seal…

As a consumer, I think it is prudent to go ahead and replace it. Basically you are paying for the cost of the part to insure that it won’t fail between timing belt intervals. By comparison, I just replaced a water pump on my MPV (has timing chain) at 158K miles. If this were a timing belt engine …

Although I have only replaced two water pumps since 1956 (on a 1941 Chevy and a 1984 Impala), I agree that the difficult location on many cars with timing belts, the pumps should be replaced at a modest extra cost on those vehicles when the timing belt is done. I was in an office once in New York,…

At 90,000 miles on my 2002 Sienna, Toyota recommended INSPECTING the water pump when replacing the timing belt, and it was good. At 180,000 miles, they recommended replacing it. Much will depend upon maintenance. If you have been pumping sludge and acid in your cooling system, your water pump sho…

Although I agree with changing the pump at the same time as the belt, let me ask a different question: How many times has a replacement pump failed prematurely? Of those times, how many pump failures took the timing belt with it, and then wrecked the engine? Any real difference between OEM pumps …

Replacing the water pump on a Toyota Sienna before it fails?

Maintenance/Repairs

Rod-Knox November 13, 2011, 5:11pm 9

A fleet customer with many vehicles had 6 vans that were driven in 2 shifts up to 600 miles each day by female college students carrying aging, invalid patients. We kept the vans running without a failure for years and each had in excess of 300,000 miles when they ended the program. It is amazing how reliable a vehicle can be if properly maintained.

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Replacing the water pump on a Toyota Sienna before it fails?

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