2008 Toyota Prius piston soak

Discussion in 'Gen 2 Prius Main Forum' started by Jordanburch, Jul 29, 2018.

  1. Jordanburch

    Jordanburch Junior Member

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    Yes i am. not every fill up but every so often

     
  2. oil_burner

    oil_burner Active Member

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    I use MMO for fuel injector cleaning too, it fixed a rough idle that gum out fuel injector cleaner and a premium gas couldn't. If you are afraid of hydrolock just leave the spark plugs out and let the car try to start the engine, leave a rag on top of the holes cause it will come shooting out.
     
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  3. padroo

    padroo Senior Member

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    That is really good news and glad it worked out for you. Give it some more time and report back again please.:)
     
  4. dbailey

    dbailey Junior Member

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    Hi all - I'm getting ready to replace the plugs and PCV valve on my 2007 (235k miles) and I would like to do a piston soak, too. I'm burning about 1 qt of oil per 3k miles. How did you make sure there was no fluid left in the cylinders before replacing the plugs? Were you able to turn it over at all with the plugs removed?
     
  5. wnrsm

    wnrsm Junior Member

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    The engine is easier to turn over with the plugs removed. I'm getting ready to do it to my Prius. I checked my oil and saw that it was barely reading on the dipstick! I have never had to add oil between changes before. It looked really clean when I had the valve cover off.

    To ensure you haven't left too much oil in the cylinders, leave the spark plugs out and turn on the car. The starter runs the engine with enough speed to violently force any dangerous amount of oil to spray out the spark plug holes. You might want to cover the holes with a towel else it will get messy.

    Any oil left behind will be insufficient to be a threat. The car will smoke really bad when you start it after it is all together. Do it at night so your neighbors don't have to see it. :)
     
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  6. Calimobber

    Calimobber Member

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    I just did a full seafoam job in my 2008. poured like 1/2 a can in the gas tank and the rest in the oil. I drove another 200miles or so and drained all the oil and filled with mobile 1 and a OEM filter.

    Yesterday I forced the car into maintenance mode so the engine stayed on and slowly dripped seafoam into the intake below the MAS sensor for about 2 minutes and then shut the car off. I waited a few minutes and then took it for a good hard drive. She sure smoked a bunch while I was seafoaming it but it burned off.

    Its been burning oil pretty good and I put a camera down when I chaned the plugs and it was pretty nasty. Ill try and get some before and after picks soon and update on the oil burning.

    I have about 237k miles on the motor, factory battery never replaced.
     
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  7. Lord Byron

    Lord Byron Member

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    098BD85C-15DD-4AA3-8A0B-E0D94C5CAA12.png
     
    #27 Lord Byron, Aug 14, 2019
    Last edited: Aug 15, 2019
  8. Lord Byron

    Lord Byron Member

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    I used one of these syphons to check for any mmo left in the spark plug holes. I was able to turn it over, but it took about 5 seconds because it ran the electric engine first. It was a loud bang and pushed mmo everywhere. I had had rags in the holes, covered with cardboard and taped down. Needless to say, that didn’t hold at all. Be prepared for clean up if you turn it over (without plugs of course). There was no mmo left when I checked with the syphon in the end.. better to check!
     
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  9. Skibob

    Skibob Senior Member

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    They sell that same pump at harbor freight for less. It’s almost always on sale for 5 or 6 .99.
     
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