ClubLexus - Lexus Forum Discussion - Water pump replacement parts

ClubLexus - Lexus Forum Discussion (https://www.clublexus.com/forums/)

- ES - 5th Gen (2007-2012) (https://www.clublexus.com/forums/es-5th-gen-2007-2012-180/)

- - Water pump replacement parts (https://www.clublexus.com/forums/es-5th-gen-2007-2012/880615-water-pump-replacement-parts.html)

Water pump replacement parts

trying to replace the water pump on a ES350 2010 exactly what should be replaced? the pump assembly the serpentine belt, should all the pulleys go? is there a timing chain to be replaced? thanks Robert

Don’t worry about the timing chain.
I did WP replacement at 70000 and I did the
following:

WP+gasket
Thermostat with all the o-rings
Coolant
Belt roller bearings
alternator pulley

The belt was like new so I left it there.

thanks, the roller bearing for the pulleys?,

Quote:

Originally Posted by LjeksesES (Post 10112279)

Thanks, I'll keep these to mind.....

Quote:

Originally Posted by Anglada (Post 10112205)

I think you're confusing replacing the water pump and the timing belt together. An unnecessary recommendation made by many dealers when timing belts dominated smaller overcam engines. The trend has swung back to timing chains and that's what the Lexus 3.5's have.

You just need coolant and the water pump. If the engine has over 100K, definitely consider replacing hoses, thermostat, serpentine belt and idler pulleys. You will not be able to replace the tensioner pulley without replacing the whole tensioner assembly. Although I strongly suspect you can replace the bearing in the pulley as I did in my 07 Tacoma. And I'm going to guess you also need the dog bone shape engine mount on top of the engine, if you haven't already replaced it.

I've seen a couple good youtube videos on replacing the water pump on ES350's.