Serpantine Belt Replacement ??

If you are going to replace the belt, pulley and tensioner on a high mileage 5.7L, is it also a good idea to replace the water pump while you are there even if it's not leaking? Is there any other preventative maintenance one should consider while doing this?

In my case, I have no idea if it's the original H2O pump or not, but I do know that it's not leaking.

 

Well, I think Toyota sees water pump replacement as maintenance. I have a 06 4Runner and recall it being recommended to replace the water pump when those other items were replaced, as a maintenance item. So, while you are in there it may be cost and time effective to handle that at the same time.

 

If it were a GM, I’d replace it. Since it is a Toyota, if it looks good and works good I wouldn’t touch it.

 

Belt takes 5 min to replace. I believe the pump is a lot more in depth(radiator, fan etc needs to be removed).

I’d leave it until it needs it.

 

Replace the pulleys while you're at it if you're hearing a slight squeal or just as preventative maintenance:
https://www.tundras.com/threads/diy...rpentine-timing-belt-and-idler-pulleys.12189/

 

I used that thread to locate and order a DAYCO brand belt, pulley and tensioner.

 

Rex, what year is Tundra you are referring to (your profile shows two: 2002 & 2007) and how many miles is "high mileage"?

 

I thought the "5.7L" would give it away... 2007 with 296,000.

 

Oh, good point, Rex. I am a victim of public schools, so there's that. Anyway, with 300k miles, and assuming that it is the original water pump, YES, I would indeed swap out the water pump while you are balls deep in there.

 

My 07 tensioner got tweaked when changing belt. Had to replace it to. It is a good idea.
As mentioned if temps are good and no leaks, I would leave it alone.

 

$56 Dayco 89502 Idler/Tensioner Pulley

Dayco 89502 Idler/Tensioner Pulley

$66 Dayco 89378 Belt Tensioner

Dayco 89378 Belt Tensioner

Dayco 5080950 Serpentine Belt