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First oil change

Discussion in 'Gen 5 Prius Care, Maintenance and Troubleshooting' started by lohikaarme, Sep 10, 2023.

  1. lohikaarme

    lohikaarme Active Member

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    Slightly disappointed. There panel to remove seems much larger compared to the gen4, however, the engineering is really beneath toyota. The panel has two jobs: allow for access to the oil filter and the oil plug.

    There is almost NO ROOM to get a tool in next to the filter. The plastic panels on the bottom of the car make it nearly impossible. (I have an adapter on this, even without, the plastic gets in the way, it is hard to picture, you guys will see wen you try to do an oil change)
    upload_2023-9-10_12-6-32.png

    Forget using a proper attachment like:
    upload_2023-9-10_12-9-55.png

    you are going to be stuck having to use inferior crap like this that slips
    upload_2023-9-10_12-10-45.png

    The problem is not getting the old filter off, that can be pulled with an oil filter wrench. But if you are someone that likes to torque things correctly, not just "give it a turn until tight and go 3/4 more" on the filter, it is going to be impossible.
     
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  2. Mendel Leisk

    Mendel Leisk Senior Member

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    You might try the honda oil filter socket, stamped heavy-gauge steel. There's only one size if I'm not mistaken (and it's what you need), and it's quite compact (but heavy duty). Couple it with a 17 mm ratcheting socket (or fixed), and it'll fit in tight quarters. Could be the TOY socket would work thus too, but it does look a little bulkier, cast aluminum?

    Appreciate you're missing out on the torque wrench, but IIRC Toyota specs 13 lb/ft OR 3/4 turn past first contact. I've found the latter method closely matches the former. Put a blob of masking tape at 6 o'clock, then tighten till it's come 'round to 3 o'clock.

    IMG_2151.jpeg
     
    #2 Mendel Leisk, Sep 10, 2023
    Last edited: Sep 10, 2023
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  3. PhoS

    PhoS Active Member

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    I used a strap wrench to get it off, worked great. There's too many variables involved to bother trying to torque an oil filter. I just put it on by hand.
     
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  4. lohikaarme

    lohikaarme Active Member

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    Update. I finished the oil change and went to home depot to get a very shallow socket. the torque wrench I have in this range (I am going to use 18ft-lbs) is a 3/8 driver. The toyo is 15/16. I managed to find a socket just shallow enough to get the toyo adapter with the torque wrench seated and torqued. The toyo didnt really like it, I had to give it some taps to allow it to come off. The filter actually screws in on a slight angle, it is not 90degree to the engine.

    On the filter itself. I picked up a replacement filter from toyota when I got the car. The filter given was 90915-YZZN1. While it looks pretty identical to what came off the car, the original filter is a different part number! 90915-10009. Below see the original filter in the replacement box:
    upload_2023-9-10_14-31-38.png

    I installed the Fumoto F133S valve. This is the updated valve that has a higher flow rate. It is the same thread spec as the plug: M12-1.25, however, it is impossible to tighten it to the 27ft-lbs spec of the plug. I really snugged it on, and checked it after the trip to home depot. It appears to be holding. It does come with a new crush washer.

    ! warning for the novices getting under there. When you pull the oil plug, the crush washer stays behind. It takes some effort to get it to come off. The bottom of the oil pan should be smooth. If it appears there is a "lip" around the oil plug hole, you left the crush washer on.

    A replacement crush washer is not provided in the oil filter box. You can probably get away with reusing the crush washer but it is recommended you change it.

    The F133S comes close to the bottom. The plastic cover fits over it with no issues. If you take a direct hit under the car in the area it will probably cause some major damage to the valve. In prius of the past, the plug was on slightly more of an angle. Looks like toyota really engineered this layout great ...... (sarcasm), worst layout I have seen across all 5 gens.

    upload_2023-9-10_14-38-32.png

    upload_2023-9-10_14-38-50.png
     
  5. Hammersmith

    Hammersmith Senior Member

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    90915-10009 is the filter used on the assembly line. You should only see it on brand new cars. 90915-YZZN1 is the correct replacement size. 90915-YZZF2 will also work in a pinch if you can't find an N1 for some reason.

    (Apparently N1 used to be made a Denso factory in China. During the Trump presidency, tariffs were added to Chinese products, so Toyota switched to F2 which was compatible with N1 but not produced in China. Toyota switched back to N1 during covid as those tariffs were suspended and Biden didn't renew them. Also, Denso switched N1 production to a factory in Thailand, so it was a moot point anyway.)
     
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    That one is longer? If so, maybe not a good idea; clearance for socket and wrench is just doable, with the shorter filter.
     
  7. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    The 3/4 turn distance on a thread is better than a torque value, or at least as good, because we are talking about a thick rubber o ring or flat gasket not metal to metal. 3/4 turn gives a precise compression distance on the gasket. 16 threads per inch = .0635” per turn. Torque is depending on the gasket resisting turning on the grease or whatever is on the gasket and the rubber. So you should use a Toyota oring type filter as aftermarket Fram etc gasket has a completely different rubber and cross section. I would say 3/4 turn is a far better way. Of course Denso proclaims theirs are torque stopper so turn until stops by hand. Using a wrench may cut a groove in the oil filter mount if gorilla force is used.
     
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  8. Mendel Leisk

    Mendel Leisk Senior Member

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    Considering taking the full panel off, at least occasionally. This affords a better view, say for leaks, and keeps its fasteners from becoming seized with grit or rust (plastic and steel fasteners).

    it’d be cool if someone could post the 5th gen oil change instruction. FWIW this stuff used to be published in Owners Manuals.
     
  9. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    My first 2020 bought new had that oil filter. Red anti drain valve. Made in China by Denso. The N1 is sort of green valve made in Thailand.
    My post on oil filters had a mistake, 16 threads is .0625” per turn gasket compression. Good way to see if anyone actually read it. Looks like not.
    I think I may source a USA made filter though, if ever I work through the three N1 I have left.
     
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  10. Blackat

    Blackat Member

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    I've never torqued an oil filter on, always by hand.
    375K miles on my Tacoma doing this every 5K.
    I also don't know of any mechanic that does that.
     
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  11. RRxing

    RRxing Senior Member

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    Toyota did not design it for use with a Fumoto valve...
     
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  12. Mendel Leisk

    Mendel Leisk Senior Member

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    Would you be averse to the following the alternate degree-of-turn spec? For example, with the spin-on filter on later 4th gen year Prius it’s 13 lb/ft or 3/4 turn past first contact.

    “Hand tighten” is gonna be quite a range, depending on your arm/hand strength, how high you’ve raised the car, even how you’re feeling. And, do you go full-bore, or just nonchalant snug-it down?

    I’d agree not all torque specs need to be slavishly followed, but something critical to engine survival, I’d respect it.
     
    #12 Mendel Leisk, Oct 2, 2023
    Last edited: Oct 2, 2023
  13. lohikaarme

    lohikaarme Active Member

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    toyota does not design any pan for use with the valve, the valve is aftermarket and the aftermarket company designs to be used with toyota.
     
  14. Mendel Leisk

    Mendel Leisk Senior Member

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    Sometimes you need to retreat. It's not easy, especially after investing some $'s and effort, but it's part of life. I think the orientation of that valve would keep me awake at night. Hit just the right road debris and your engine's life blood would be a trail down the road. These valves have their fans, but I'd pass.
     
  15. Blackat

    Blackat Member

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    I hand tight pretty well til it doesn’t move much anymore. As long as the filter seals, it’s good
     
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  16. ColoradoBoo

    ColoradoBoo Senior Member

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    Dang, that is a tight fit for a wrench!

    And Toyota Part numbers will give you gray hairs.....But the 90915-YZZN1 Replaces: 08922-02005, 15600-13051, 15600-16020, 15600-16021, 15601-01010, 15601-13010, 15601-13011, 90080-91034, 90080-91058, 90915-03001, 90915-10001, 90915-10003, 90915-10009, 90915-TA001, 90915-YZZA2, 90915-YZZF2, 90915-YZZM1

    Come on, Toyota....KISS (keep it simple stupid)

    I was pleasantly surprised that my old 2008 Corolla and 2017/2021 Priis all use the YZZN1 filter so I buy them in bulk. (I also buy the drain plug crush washer in bulk but some newer car models' filter have them in the box....my daughter's Hyundai and son' VW both do.