Welcome to PriusChat

We'd love to have you join our community and participate in the conversation! Sign up for FREE today.

Sign Up

1G Prius engine reseal

Discussion in 'Gen II Prius Technical Discussion' started by galaxee, Mar 22, 2007.

Social Buttons

  1. galaxee

    galaxee mostly benevolent

    Joined:
    Mar 14, 2005
    Messages:
    9,810
    Likes Received:
    373
    Location:
    MD
    Your Vehicle Year:
    2005 Prius
    Model:
    N/A
    phone camera pics, kinda low quality, but you get the idea.

    oil leak where the head meets the block, along the edge of the timing chain cover.
    [​IMG]

    exhaust port on head. on the port on the right, you can see the valve stem through the port.
    [​IMG]

    rear main oil seal and end of crankshaft
    [​IMG]

    transmission minus engine
    [​IMG]

    lower oilpan removed, oil pickup tube exposed. on lower right is where the oil filter screws on, with the threaded centerpost missing
    [​IMG]

    carbon and oil buildup on intake port
    [​IMG]

    flywheel: note in the next 3 pics the very small area clutch plate actually contacts.
    [​IMG]

    clutch plate
    [​IMG]

    pressure plate
    [​IMG]

    engine minus valve cover
    [​IMG]

    engine, upside down, timing cover removed, timing chain exposed
    [​IMG]

    ends of camshafts. on the left is the vvt sprocket.
    [​IMG]

    camshaft lobe sticking up
    [​IMG]
  2. Frank Hudon

    Frank Hudon Senior Member

    Joined:
    Jan 11, 2004
    Messages:
    4,147
    Likes Received:
    6
    lots of varnish build up on the interior and from the angle it looks like a lot of play in the timing chain. How many miles on this car and any history on the oil change interval and the brand of oil used? Thnx the DH for providing them.
  3. galaxee

    galaxee mostly benevolent

    Joined:
    Mar 14, 2005
    Messages:
    9,810
    Likes Received:
    373
    Location:
    MD
    Your Vehicle Year:
    2005 Prius
    Model:
    N/A
    109k on it, and DH also noticed the varnish. no clue as to the oil change history, he hasn't looked it up in the customer service history.
  4. tochatihu

    tochatihu Senior Member

    Joined:
    Apr 10, 2004
    Messages:
    4,016
    Likes Received:
    598
    Location:
    Kunming Yunnan China
    Your Vehicle Year:
    2001 Prius
    Would like to see if there is less varnish in a big-odometer Prius that has been on a diet of synthetic motor old. Perhaps the simplest place to look would be in the sump, at the expense of a new gasket.
  5. bwilson4web

    bwilson4web 03 and 10 Prius

    Joined:
    Nov 25, 2005
    Messages:
    12,302
    Likes Received:
    3,577
    Location:
    Huntsville AL with 2003 Prius
    Your Vehicle Year:
    2010 Prius
    Model:
    III
    <div class='quotetop'>QUOTE(galaxee @ Mar 22 2007, 12:43 AM) [snapback]410011[/snapback]</div>

    Great photos but can you tell if the crank throws impact the oil in the pan if it is overfilled?

    One of the hypothesis about overfilled oil is the crank throws impacting the oil in the pan.

    Bob Wilson
  6. hobbit

    hobbit Senior Member

    Joined:
    Mar 23, 2005
    Messages:
    4,084
    Likes Received:
    413
    Location:
    Bahstahn
    Your Vehicle Year:
    2004 Prius
    Model:
    N/A
  7. glenk

    glenk Member

    Joined:
    Dec 13, 2005
    Messages:
    104
    Likes Received:
    0
    Location:
    Cupertino, CA
    Your Vehicle Year:
    2006 Prius
    Model:
    Three
    Does the title of the thread sugggests that this engine was in for repair of an oil leak(s)?

    Anyways, thanks for the pictures. My guess is this Prius was just "driven". I've seen less varnish on engines with twice the mileage.

    It appears that the water passage looks clean though.

    Interesting to find out about the clutch mechanism. Maybe to reduce the shudder during engine shutdown/startups?
  8. duanelaugh

    duanelaugh New Member

    Joined:
    Jul 23, 2006
    Messages:
    57
    Likes Received:
    0
    Location:
    Bradenton fl area
    Your Vehicle Year:
    2006 Prius
    <div class='quotetop'>QUOTE(glenk @ Mar 27 2007, 05:31 PM) [snapback]413164[/snapback]</div>


    That's odd, I have always read that the Prius has no clutch....what gives?
  9. Frank Hudon

    Frank Hudon Senior Member

    Joined:
    Jan 11, 2004
    Messages:
    4,147
    Likes Received:
    6
    <div class='quotetop'>QUOTE(Duane @ Apr 1 2007, 05:06 AM) [snapback]415912[/snapback]</div>

    all Prius have the "drive plate" as show to reduce the pulses from the ICE to the drive train. And yes there have been reports of them slipping.
  10. nwprius

    nwprius Member

    Joined:
    Feb 26, 2004
    Messages:
    199
    Likes Received:
    13
    Location:
    Roy, Washington and Nanaimo, Canada
    Your Vehicle Year:
    2011 Prius
    Model:
    Five
    Thanks so much for the pictures.

    Clutch???? Please let us know just how it works.
  11. ekpolk

    ekpolk The Regenerator

    Joined:
    Jul 31, 2006
    Messages:
    368
    Likes Received:
    4
    Location:
    Pensacola FL
    Your Vehicle Year:
    2004 Prius
    Gak! Someone wasn't changing their oil. . .
  12. galaxee

    galaxee mostly benevolent

    Joined:
    Mar 14, 2005
    Messages:
    9,810
    Likes Received:
    373
    Location:
    MD
    Your Vehicle Year:
    2005 Prius
    Model:
    N/A
    updated to put pics back into text.
  13. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    Messages:
    13,350
    Likes Received:
    3,189
    Location:
    Green Valley, AZ
    Your Vehicle Year:
    2007 Prius
    Model:
    N/A
    Hi Galaxee,

    Thanks for reposting this string, I had not previously seen it when I was a PriusChat lurker. I understand that the root problem was an oil leak on the timing chain cover, and that it was necessary to remove the engine and transaxle to gain access to said cover. Considering the mileage and the interior condition of the engine, perhaps the owner would have been better off installing an engine from a salvage vehicle of lower miles, since it seems a salvage engine is relatively inexpensive.
  14. galaxee

    galaxee mostly benevolent

    Joined:
    Mar 14, 2005
    Messages:
    9,810
    Likes Received:
    373
    Location:
    MD
    Your Vehicle Year:
    2005 Prius
    Model:
    N/A
    with higher mileage engines like that, it's not unusual to see carbon buildup and a little varnish. they keep running fine that way. besides, anything you want can be tossed in a parts washer. generally speaking, if it fits it goes in when it's disassembled like that. ;)

    considering the cost would be about the same for a replacement engine, plus the seals would not be new and replaced as such, and condition of the replacement is unknown vs the known engine you've been driving on... it's kind of a toss-up as to whether it would be worth it.

    when DH swapped the engine from our smashed camry into our es250, we stuck with that one because [a] we were cheap and we already knew what to expect from it. (toyota learned their lesson about bottom ends with the 2vz)
Similar Threads: Prius engine
Forum Title Date
Gen III 2010+ Prius Main Forum Need for RPM and engine coolant temperature display on a Prius Today at 4:25 PM
Prius v Care, Maintenance and Troubleshooting What does the Prius v engine sound like? Sep 19, 2014
Gen II Prius Care, Maintenance and Troubleshooting 2008 Prius Engine Light Code Help? Sep 12, 2014
Generation 1 Prius Discussion 2002 Prius lacking power with high revs of engine after a few minutes o driving but restart fixes it Sep 9, 2014
Gen II Prius Main Forum Prius Engine Swap job near Chicago area. Sep 6, 2014