Wanted to continue my experience of replacing the water pump in a 2008 Toyota Avalon Limited. This is a job that can be done by the backyard mechanic but is not a job that can be accomplished easily in one day. I had the luxury of having an extra car to drive during the time it took me to figure out the removal and installation of the water pump.
Top line tips to accomplish this job successfully:
1. Raise the right front of the car off the ground, remove the front right tire. Put this side of the car on jack stands. As you do this job, there are parts of the water pump that you have to access from the top of the engine and other parts that you access from the right hand side wheel well.
2. The top engine stabilizing bracket is easy to remove, but keep track of the bolts that are used to install and hold this on since there are 6 bolts and all different lengths.
a. Refer to this drawing for reference on the brackets: http://www.villagetoyotaparts.com/sh...ssembly=334967
3. For the Engine Mounting Bracket Front No. 1 LH, this is a bit tricky to remove since there are quite a few bolts that hold this onto the engine also. Refer to the posting from Mike about the removal of this part.
4. You will have to remove the serpentine belt from the engine bay so that you can get to all of the bolts on the water pump.
a. To do this, you need to relieve the tension on the belt by locking the belt tensioner into place, there is a ¼” hole in the tensioner and you can slip in a drill bit to lock it into place.
b. Remove the belt from the engine bay.
c. Remove the two idler pulleys, front and rear, and make sure that you keep the bolts and the two washers in the correct order. I taped them together and marked them ‘Front’ and ‘Back’. b.
c. Remove the pulley from the belt tensioner; there is a left handed thread on this bolt. There is no need to remove the tensioner from the engine.
d. I replaced the serpentine belt, $33.00 from Mid Atlantic Toyota (http://www.midatlantictoyotaparts.co...ts-and-pulleys
5. When you loosen the 4 bolts that hold the pulley to the water pump, you will not be able to remove the pulley. You will have to remove all of the bolts on the water pump, there are three that are hidden behind the pulley, and then take the water pump out with the pulley dangling. Remember to do the reverse when you put the water pump back in.
6. Keep track of where the bolts go on the water pump, there are 18 bolts total that hold this on to the engine, with two different size bolts, a 10 MM head and a 12 MM head. I drew a picture of the bolt locations on a piece of cardboard and as I removed the bolts, I punched a hole in the card board to store the bolt. This trick made the installation really easy ( I learned this from my father).
7. There are two bolts on the water pump that are just blocked a bit by the pulley on the power steering pump. You can only loosen or tighten these only with an open ended wrench. There is no room to get a socket in there nor is there room to get the boxed end part of a wrench in there. Once the bolts are loose, you can just slip them past the power steering pulley, so no need to remove the power steering pump.
8. There are two o rings (16325-31010 HOUSING GASKET) that are on the thermostat housing (Part Number 16323-0P030 HOUSING) replace these as a precaution. I purchased the parts from Mid Atlantic Toyota (http://www.midatlantictoyotaparts.com
a. Delivery from Mid Atlantic took 3 business days and this was during the holiday rush around Christmas.
9. The water pump can be removed from the engine bay without jacking up the engine, you sort of pull up a bit on the whole pump, maybe an inch, then rotate it about 25 degrees in a counter clock wise rotation to take it out, you will have to be very gentile with it, but it does come out of the bay. Installation is the reverse.
Good luck if you have to do this job.
Lastly, and this is to Toyota, I hope you monitor these posts, I am disappointed in the quality of this water pump and how short the life of this part was, since the car only has 80,000 miles on it. The water pump is not designed for maintainability and has made me consider not purchasing a Toyota next time I get a car.