How much does it cost to switch out a piston?

Discussion in 'OT Driven' started by slimjim, May 14, 2009.

  1. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    Swapped out my spark plugs a while ago which temporarily fixed a misfire problem. Then a few weeks later I started getting the misfire again. I remember when I was taking out the old spark plugs, one of them was broken completely in half. I didn't think anything of it but now I'm thinking one of the pistons is coming up too high and hitting the bottom of it, which is what caused it break and most likely why it's misfiring again. So. Pricey or reasonable?
     
  2. T0nyGTSt

    T0nyGTSt New Member

    Joined:
    Dec 29, 2004
    Messages:
    973
    Likes Received:
    0
    it's not possible for the piston to hit the spark plug

    are you using shitty spark plugs? I cracked most of my spark plugs because they were underrated for the job

    i use iridiums now
     
  3. americanwit

    americanwit OT Supporter

    Joined:
    Nov 28, 2004
    Messages:
    1,192
    Likes Received:
    1
    Location:
    Houston, TX
    jesus christ the ignorance
     
  4. CJPA

    CJPA New Member

    Joined:
    Jan 14, 2002
    Messages:
    114,304
    Likes Received:
    0
    Location:
    AZ, USA
    HAY GUISE WHAT'S GOING ON IN HERE?
     
  5. you know me

    you know me OT where the douchbags play

    Joined:
    Dec 7, 2001
    Messages:
    84,671
    Likes Received:
    17
  6. Justintiime

    Justintiime OT Supporter

    Joined:
    Sep 25, 2005
    Messages:
    3,767
    Likes Received:
    65
    Location:
    Roanoke, VA

    tru.

    I would check your tune up parts first. Then use GOOD plugs. If that doesnt solve it, its more than likely a problem with the head depending on what your mileage is.

    Unless this is a troll post.
     
  7. victimizati0n

    victimizati0n New Member

    Joined:
    Jun 16, 2005
    Messages:
    47,046
    Likes Received:
    0
    wrong, it is possible for a piston to hit a spark plug

    but it sounds like detonation is what destroyed the thread starters plug.
     
  8. alltracman78

    alltracman78 New Member

    Joined:
    Nov 11, 2006
    Messages:
    316
    Likes Received:
    0
    The piston can definitely hit the plug.
    It's unlikely only one cylinder would do this though [assuming you used the same plugs in all the cylinders].

    Take a look at the plug in that cylinder again, see what it looks like.

    Misfire can be caused by a crapload of things.

    Dot
     
  9. Smelly-Kitten

    Smelly-Kitten Dept. of Redundancy Department *Side Pipes

    Joined:
    Sep 19, 2003
    Messages:
    5,709
    Likes Received:
    0
    Location:
    UCSD
    on certain engines it's possible, others are non-interference like old 2V volvo engines. Unless you change the squish it's never going to hit even the valves.
     
  10. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    Nope, just ignorant :)


    I did use Autolite plugs, maybe that's the problem?
     
  11. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    The fact that you came out from lurking in the shadows to post this means I said something really stupid :rofl:
     
  12. alltracman78

    alltracman78 New Member

    Joined:
    Nov 11, 2006
    Messages:
    316
    Likes Received:
    0
    It won't happen on any engine if you have the correct pistons and plugs.

    It can happen on any engine if you have the wrong pistons or plugs [more likely].
     
  13. alltracman78

    alltracman78 New Member

    Joined:
    Nov 11, 2006
    Messages:
    316
    Likes Received:
    0
    You have a Pontiac, correct?
    IIRC Autolite is Ford?
    If you do have a Pontiac I would suggest AC Delco or NGK. Whatever the stock spec is.
     
  14. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    Yeah I have a Grand Am. I just went to Advanced Auto Parts and that was the plug they recommended :dunno: I hear great things about AC Delco and NGK though.
     
  15. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    Ok I just took them all out again. They all looked pretty normal, no corrosion and no wetness, but the misfiring plug's gap was around .020 in, and I know for a fact that they were all gapped properly before being put in. Something has to pushing that terminal upwards.
     
  16. Smelly-Kitten

    Smelly-Kitten Dept. of Redundancy Department *Side Pipes

    Joined:
    Sep 19, 2003
    Messages:
    5,709
    Likes Received:
    0
    Location:
    UCSD
    Haha, well yeah. Your saying if everything is how it should be it wont hit the SP, well I'd hope so. I doubt a non interference engine can hit a sparkplug unless that bitch is one protruding erection
     
  17. rockstar b

    rockstar b no OT Supporter

    Joined:
    Jun 25, 2007
    Messages:
    4,866
    Likes Received:
    7
    Location:
    Athens, Georgia
    if one piston were hitting a plug, all of the pistons would be hitting their respective plugs.
     
  18. Justintiime

    Justintiime OT Supporter

    Joined:
    Sep 25, 2005
    Messages:
    3,767
    Likes Received:
    65
    Location:
    Roanoke, VA
    put in Delco plugs.
     
  19. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    Is it possible that it's the fuel injector? I want to look at it while the engine is on to see if it's still giving a nice conical spray, but I'm not sure how to get at it.
     
  20. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    If there was a bubble in the ceramic, it could heat up unevenly and crack apart at that spot.
     
  21. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    Okay, this has to be trolling. Not only does detergent gasoline keep injectors clean, and not only is spraying gas near a running engine a fantastically bad idea, but the spray also doesn't last nearly long enough for a human to see what shape it is. Oh, and not all injectors have conical spray patterns. The ones on my car have a 4-hole pintle design.
     
  22. slimjim

    slimjim New Member

    Joined:
    Dec 14, 2004
    Messages:
    8,231
    Likes Received:
    0
    Location:
    Lawrence, KS
    Nope, like I said, I'm just new to this kind of thing. This is my first car and I'm trying my hardest to learn a little something something about it.

    So why does it say in repair manuals and such that if your injector isn't spraying in a conical pattern then it's clogged. How is one supposed to tell if he can't even see it?

    And I don't use detergent gasoline, too poor.
     
  23. Mr3GTP

    Mr3GTP OT Supporter

    Joined:
    Jan 1, 2006
    Messages:
    30,603
    Likes Received:
    0
    Location:
    O motherfucking HI-O
    Carbon? Built up on the piston? Longshot, but I'll throw out a wild guess...
     
  24. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    You don't have a choice about using detergent gasoline; they all come with detergents mixed in nowadays.
     
  25. Justintiime

    Justintiime OT Supporter

    Joined:
    Sep 25, 2005
    Messages:
    3,767
    Likes Received:
    65
    Location:
    Roanoke, VA

    [​IMG]
     

Share This Page