Going overboard?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by benwray1, Jun 28, 2025 at 3:14 PM.

  1. benwray1

    benwray1 Junior Member

    Joined:
    Aug 3, 2023
    5
    0
    0
    Location:
    Olathe, KS
    Vehicle:
    2010 Prius
    Model:
    N/A
    Hey all, I am doing some maintenance on my Gen 3 Prius IV, with 162K miles on it. The engine bay is super dirty, mostly because of a valve cover gasket leak that I am fixing. Here's a list of what I'm doing:

    1. New Plugs/Coils
    2. Valve Cover Gasket
    3. EGR valve cleaning, Throttle Body cleaning, Intake Manifold and Intake cleaning
    4. EGR cooler/tube cleaning
    5. PCV replacement
    6. Oil Catch Can Install
    7. Fuel injector cleaning - I bought a tool on Amazon to clean them after you remove them.
    8. Struts? - I'm not sure if I need to do this or not. This Prius IV is louder than my other Gen 3 Prius I as far as tire noise.
    9. New weatherstripping/window seals
    10. Sound absorption spray under wheel wells.
    11. Sound absorption panels in doors.
    12. Transmission fluid
    13. Coolant and Inverter Coolant

    None of this is due to poor performance, but I'd like to get the best MPG and have the car last as long as possible. I feel like I may have taken on too many improvements. I'm following some of the other posts in this thread but would appreciate your thougths. Thanks!
    Ben
     
    #1 benwray1, Jun 28, 2025 at 3:14 PM
  2. NutzAboutBolts

    NutzAboutBolts Senior Member

    Joined:
    Mar 5, 2013
    1,552
    1,640
    0
    Location:
    Bay Area
    Vehicle:
    2012 Prius
    Model:
    Four
    I wouldn’t replace the ignition coils if it’s not bad.
    But everything else seems like good preventative maintenance. You better brush up on how to replace the headgasket for the future.
     
    #2 NutzAboutBolts, Jun 28, 2025 at 11:09 PM
    Mendel Leisk, Brian1954 and benwray1 like this.
  3. benwray1

    benwray1 Junior Member

    Joined:
    Aug 3, 2023
    5
    0
    0
    Location:
    Olathe, KS
    Vehicle:
    2010 Prius
    Model:
    N/A
    Thanks! And thanks for all your helpful YouTube Videos!
     
    #3 benwray1, Jun 29, 2025 at 12:02 AM
  4. benwray1

    benwray1 Junior Member

    Joined:
    Aug 3, 2023
    5
    0
    0
    Location:
    Olathe, KS
    Vehicle:
    2010 Prius
    Model:
    N/A
    Would you consider replacing the struts to be preventative?
     
    #4 benwray1, Jun 29, 2025 at 12:03 AM
  5. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,431
    4,182
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    Shocked that te standard engine oil and trans fluid replacement was left out.
     
    #5 Grit, Jun 29, 2025 at 4:18 AM
  6. adrtho4

    adrtho4 Junior Member

    Joined:
    Jul 12, 2016
    45
    10
    0
    Location:
    Houston, TX
    Vehicle:
    2014 Prius
    Model:
    Three
    When I did my head gasket job I...

    1. Replaced the engine coils and spark plugs (bought a kit that had both)
    2. Replaced PCV valve
    3. Replaced Head gasket
    4. Replaced Water Pump (will replace again as the water pump I bought isn't running properly)
    5. Replaced Timing chain tensioner gasket
    6. Changed Filter, oil, and coolant
    7. power washed the egr, timing chain cover, and intake manifold and cleaned those parts very well.

    I didn't bother with the fuel injectors as I didn't remove those. The rest of the stuff, honestly sounds like "extra credit" or stretch goals. I do need to replace the weather striping on my car however but struts? Maybe I could do the same. Interested in that fuel injector kit you mentioned however. What did you end up buying?
     
    #6 adrtho4, Jun 29, 2025 at 8:53 AM
  7. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    58,863
    40,519
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    First cleaning?
     
    #7 Mendel Leisk, Jun 29, 2025 at 9:07 AM
  8. benwray1

    benwray1 Junior Member

    Joined:
    Aug 3, 2023
    5
    0
    0
    Location:
    Olathe, KS
    Vehicle:
    2010 Prius
    Model:
    N/A
    Yes I will do those too. I forgot to write them down.
     
    #8 benwray1, Jun 29, 2025 at 11:09 AM
  9. benwray1

    benwray1 Junior Member

    Joined:
    Aug 3, 2023
    5
    0
    0
    Location:
    Olathe, KS
    Vehicle:
    2010 Prius
    Model:
    N/A
    Yes, I bought it with about 150 K. And it's pretty dirty.
     
    #9 benwray1, Jun 29, 2025 at 11:11 AM
  10. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    112,257
    51,068
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    do you get your parts from olathe toyota?
     
    #10 bisco, Jun 29, 2025 at 1:44 PM
(You must log in or sign up to post here.)