- Joined
- Nov 2, 2021
- Messages
- 1,116
They're running "0w20" through that new turbocharged v6
Toyota's new electric oil pump.
- Thread starter Bill7
- Start date
ls1mike
$50 Site Donor 2025
I didn't read everything, but even my 3500HD has a variable displacement oil pump. It adjust based off a few things, but is routine to see oil pressure sitting at 20 to 25 at idle with 5W-30. It will get as high as 50 to 60 and will sit at 35 to 38ish cruising down the road with a trailer.
OVERKILL
$100 Site Donor 2021
Variable displacement pumps have been quite common for the last while, but they are electrically actuated/controlled, not operated. They are still a mechanical pump.
So on a regular mechanical non sophisticated oil pump, as RPM increases, more oil pressure PSI should be produced by the mechanical oil pump.
That is how most cars work. But the Toyota electric oil pump is changing that gradual increase in oil pressure to a fixed 10psi for example. Therin lies the potential for increased wear if your RPM = 2999 you would get 10psi (as the Toyota oil pump increases from 10psi to 40psi at 3,000 RPM).
That is how most cars work. But the Toyota electric oil pump is changing that gradual increase in oil pressure to a fixed 10psi for example. Therin lies the potential for increased wear if your RPM = 2999 you would get 10psi (as the Toyota oil pump increases from 10psi to 40psi at 3,000 RPM).
- Joined
- Nov 2, 2021
- Messages
- 1,116
"It's for an example " to make the layman understand. It's an electrical motor that takes care of business on the fly. Stop trying to find fault.. a barista gets a drink wrong @ 15 bucks an hour.
ls1mike
$50 Site Donor 2025
No I get it, I was more addressing people being worried about low oil pressure. I had some LT1 cars that run at 5 to 10 warm/hot idle after 100,000 miles for 100,000 more miles.
Toyota knows that 99.99999 % of the people that buy a vehicle with an electric oil pump wont know and if they did they would not care.
ls1mike
$50 Site Donor 2025
You are not wrong.
And it is interesting that BMW has gone back to engine driven pumps on their latest generation 4 and 6 cylinder models (B48/B58)
A brilliant idea. Bringing the oil pressure up before starting the engine would do a lot to reduce wear.
BMW did that because their electric cooling pumps would croak at about 60k miles. Why? The electric motor was getting the full heat from the coolant as it wasn't insulated in any way.
Yea, the BMW pumps looked like a turbo or a Vortex blower with the motor mounted inboard. Made by Conti.
The Aisin electric one Toyota uses on the 2ZR-FXE and the second version of the 1NZ-FXE for the 3rd/4th gen Prius and Prius C have the electric motor sticking out from the accessory drive end of the engine. Failures of them are heard of but rare.
Decided to ask the all wise, all knowing Google and found this… took a whopping 2 minutes to find…
https://toyota-club.net/files/faq/18-03-20_faq_df_r4_eng.htm#A25A-FKS
https://toyota-club.net/files/faq/18-03-20_faq_df_r4_eng.htm#A25A-FKS
Attachments
Last edited:
There's no doubt that fully modulated electric oil and water pumps, and electric fans all are in the direction of maximum efficiency. We are adding complexity for more efficiency.
- Joined
- Nov 2, 2021
- Messages
- 1,116
That's what us humans do.
Great details on there, thanks. Enjoyed the details. Perhaps translated from Japanese? (but absolutely vicious "economical" replaceable paper cartridges.)
As the Sales department used to say....it's time to shoot the engineers and ship the product.
Good find. Lots of polymer inside these motors. That will freak out some.
I enjoyed the oil filter description:
“It is a normal spin-on type filter, unlike the popular on previous engine generation but absolutely vicious "economical" replaceable paper cartridges.”
Increased efficiency is a bad thing, if it means increased engine wear and shorter engine life.
Similar threads
