HI so im wondering i thought i read that out ES300h being hybrid did not have water pump or alternator that ran on a serpentine belt ?
but how come if im looking on MyLParts.com or other OEM lexus parts online stores it shows there is a Belt for the vehicle.
did i miss understand what we do and dont need for maintenance on the ES300h ?

https://www.mylparts.com/v-2016-lexu...ts-and-pulleys

 

I don't know much about the hybrid ES but it has an I/C engine that requires cooling and the electrical accessories require power. So, a water pump and alternator driven by a belt would be a necessity...

 

Obviously a mistake on this site. No belts of any kind in ES300h drivetrain. Consult parts.lexus.com for accurate info.

 

Hmmm. I guess I know less than I thought. Thanks for the info...

 

ok thank you. so im a bit wondering how does the engine stay cool if no belt for the water pump.
I can understand ok the alternator is something special that doesn't require a belt to charge the system since its a hybrid system there is probably some high tech alternator that sends power to everything. and the P/S is electronic. But i am wondering how does it stay cool ? if no belt for the water pump is it an electronic water pump ? or no W/P at all so don't even have to worry about one of those ever going bad?

I know i was surprised when i saw that it says inverter does not have to be flushed or fluid changed until 150k but then i saw that the engine coolant needs to be changed on maintenance intervals of 100k
does anyone recommend going the full 150k before changing the inverter converter fluid? im kind of curious why its 150k first time than says 50k every other time.
isn't the fluid for the inverter converter the exact same as the long-lasting pink or red Toyota coolant? so why would one be ok at 100k and one need every 50k after the first 150k?
and if im driving 60k per year on average do i really need to do the inverter every 50k after the first 150K or would say giving it just a straight 2 year intervals no matter ho much i drive it be ok ? i would like to plan on getting 5 years before my next vehicle purchase so that would mean 365k on the vehicle in 5 years from now. thats with the 63k on it now.

 

ESh has an electric water pump, an electric power steering pump, an electric AC compressor. There is no alternator as MG1, the small motor charges the hybrid and 12V battery. There are no belts. There is a timing chain for the camshaft and oil pump.

Dont know much about fluid change intervals other than no harm being a little cautious.

 

cool thank you for the info helps me to understand more

 

i think it’s Electric Power Steering, i.e. an electric motor assists the steering. No pump or fluid involved.

 

From an engineering standpoint the inverter fluid does not go through the same heat cycle changes as the coolant for the engine. One would surmise therefore that changing the inverter coolant can happen later than the regular engine coolant because the engine coolant would break down faster.