1. The site is migrating to a new server this week, so there will likely be some downtime during that process. You can follow along here for updates.

Ignition coil gasket/seal

Discussion in 'Gen 2 Prius Main Forum' started by Ernie stires, May 25, 2023.

  1. Ernie stires

    Ernie stires Member

    Joined:
    Jun 28, 2022
    80
    26
    0
    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    Base
    I discovered that water had splashed up (big puddle) and water had gotten into my #1 spark plug tube causing misfire. Took out the coil pak, fried everything off including the tube and reinstalled the coil, but I was not sure which way the gasket sits and if it is designed to just sit on top of the valve cover. I installed with the flat side up, tightened the 10mm and my bad miss is solved but I’d like to avoid this happening again
     
    #1 Ernie stires, May 25, 2023
  2. pasadena_commut

    pasadena_commut Senior Member

    Joined:
    May 2, 2019
    1,091
    336
    0
    Location:
    Southern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Does your car have both front fender liners and the plastic splash guards behind the bumper? If those are in place it really shouldn't get that wet in the engine compartment. Unless by "big" you meant "deep", in which case all bets are off unless you have an amphibious vehicle.
     
    #2 pasadena_commut, May 25, 2023
    Ernie stires likes this.
  3. Ernie stires

    Ernie stires Member

    Joined:
    Jun 28, 2022
    80
    26
    0
    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    Base
    Yes the liners and guards are there but I know not fitted correctly, loose. The puddle was much deeper than I anticipated, a clogged drain at an intersection. In any event I will look more seriously at the splash guards.
     
    #3 Ernie stires, May 26, 2023
  4. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,152
    3,614
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    It is more likely to be water overflowing from the wiper tray that gets into the spark plug tubes. Check that the drain holes in the wiper tray are clear from obstructions and able to drain freely. Also, check the seal strip that goes along the rear (underside) of the hood is firmly attached and undamaged.
     
    #4 dolj, May 26, 2023
    Ernie stires likes this.
  5. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,091
    4,778
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    If the car lives outside it may well have clogged water vents from leaf debris like dolj said.

    There was a TSB out on that water dam seal failing many many years ago. i would just replace it with a new oem seal. The new seal is better. I replaced mine.

    To check the water vents take a water hose and fill up the water dam at the bottom of the windshield. Water should run out the back of each front tire on each side. Nice good stream. If not its clogged. Any overflow of water from a clog or the seal failing will fall right on top of the motor and foul the cops.

    Its fairly easy to remove the plastic dam and clean it out. Just need to take the wiper arms off.

    Btw, removing that dam for a cleaning is the best time to replace the spark plugs its wicked easy with that dam tray out of the way.

    Here's what it looks like under the dam:
     

    Attached Files:

    #5 edthefox5, Jun 6, 2023
    Ernie stires likes this.
  6. Ernie stires

    Ernie stires Member

    Joined:
    Jun 28, 2022
    80
    26
    0
    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    Base
    Yes, they were totally clogged from Honey Locust Tree pollen! Plus the seal was wrapped, I did clean it and flip the seal, but I’ll
    Try to get a replacement seal. Thx’
     
    #6 Ernie stires, Jun 15, 2023
    edthefox5 likes this.
  7. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,091
    4,778
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Excellent!
     
    #7 edthefox5, Jun 15, 2023
    Ernie stires likes this.
  8. Ernie stires

    Ernie stires Member

    Joined:
    Jun 28, 2022
    80
    26
    0
    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    Base
    Side note, the coils have grommets to seal them and keep water out. I expect they loose their effectiveness over time, I did replace one as the original slipped out of my hands and landed somewhere in the back of the engine.
     
    #8 Ernie stires, Jun 17, 2023
  9. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,091
    4,778
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    #9 edthefox5, Jun 17, 2023
(You must log in or sign up to post here.)
Loading...
Similar Threads - Ignition coil gasket
  1. pmelc1

    Multiple misfires / repeated ignition coil failure, need help with some odd symptoms

    pmelc1, Jul 30, 2023, in forum: Gen 2 Prius Main Forum
    Replies:
    1
    Views:
    399
    Tombukt2
    Jul 30, 2023
  2. SkyRides

    Advance ignition timing issue on 2nd Gen.

    SkyRides, May 11, 2021, in forum: Gen 2 Prius Main Forum
    Replies:
    8
    Views:
    1,774
    dolj
    May 17, 2021
  3. Prius in Maryland

    Ignition Starts, but ready light and dashboard light off

    Prius in Maryland, Jan 1, 2020, in forum: Gen 2 Prius Main Forum
    Replies:
    11
    Views:
    3,714
    Priuslover09
    Jan 15, 2020
  4. jonsmilburn

    12 volt battery and ignition coil replacement

    jonsmilburn, Jul 7, 2010, in forum: Gen 2 Prius Main Forum
    Replies:
    10
    Views:
    5,155
    Patrick Wong
    Jul 12, 2010
  5. tallen

    Picture needed: Ignition coil

    tallen, Nov 2, 2008, in forum: Gen 2 Prius Main Forum
    Replies:
    7
    Views:
    2,564
    jayman
    Nov 4, 2008