1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

I snapped my exhaust camshaft...pics

Discussion in 'Auto Multi-Media' started by D See 2, May 30, 2004.

  1. D See 2

    D See 2 Senior Member

    Messages:
    2,405
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    Baltimore, MD
    well i was on my way home from a friends house last night and i was going about 115 or so and i went to shift into 5th but 3rd is what i got. it tached out to about 10,000 rpm.
    -----
    i have:
    comp cams springs and Ti retainers with stage 2 cams (b16a stock shortblock)
    -----
    I didnt think anything really happened. the car seemed to run fine. so i went straight home and didnt mess with it for the remainder of the evening. Anyhow, i woke up this morning and popped the hood then fired her up. It started fine and I stood in front of the car listening for anything unusual... it sounded fine. As i was looking around, i noticed the exhaust cam gear was sticking out about 3mm more than the intake cam gear. right then i was like FUCK! so i shut her down and pulled the valve cover off. sure enough, the exhaust cam snapped over the #4 cylinder between the vtec lobe and the far left lobe... have a look see. the first pic is what it should look like. the second and third are with it pulled apart.

    i'll pull the head later this week to see the extent of the damage. but luckily, i didnt hear anything unusual, and it seemed to run decent.

    [​IMG]

    [​IMG]

    [​IMG]

    :cliffs:
    i fucked up and shifted into 3rd instead of 5th @ 115 mph and broke my exhaust camshaft.
     
  2. MikeBergy

    MikeBergy Blah blah blah....

    Messages:
    3,646
    Likes Received:
    1
    Joined:
    Oct 9, 2003
    Location:
    Central Coast, CALI
    Shoot!! only 10K, I'm BUILDING my motor to handle like 13k and make power at 10k; I hope my skunk2s don't snap like that...
     
  3. BigJ

    BigJ I'm just about that action Boss. VIP

    Messages:
    11,091
    Likes Received:
    408
    Joined:
    Oct 4, 2002
    Location:
    Washington
    :doh: That sucks, but thank god that's all the damage. My buddy did the same thing in his semi-built gsr, and the rod went through the block and left a hole the size of a silver dollar.
     
  4. pissedoffsol

    pissedoffsol RETIRED

    Messages:
    49,693
    Likes Received:
    54
    Joined:
    Sep 28, 2002
    Location:
    Retirement Home

    :eek:

    wtf for?
     
  5. brian11to1

    brian11to1 Senior Member

    Messages:
    9,203
    Likes Received:
    21
    Joined:
    Jan 9, 2003
  6. jamesA

    jamesA Well known pissed off telephone guy VIP

    Messages:
    16,127
    Likes Received:
    1,020
    Joined:
    Aug 10, 2003
    dayum... I've almost done that... (put it in 3rd instead of 5th) but I caught it before I let the clutch back out.

    That sucks dude...what are you gonna do?
     
  7. civicious

    civicious FüK-VTEC VIP

    Messages:
    9,855
    Likes Received:
    629
    Joined:
    Jun 15, 2003
    Location:
    Houston, TX
    lmfao...a while back, driving Knive's hatch (pre-H22) in houston, i was freeway-racing some fucktard down I45...went from around a 20mph roll...instead of going into 3rd, i hit 1st at about 60mph...


    poor d16.
     
  8. brian11to1

    brian11to1 Senior Member

    Messages:
    9,203
    Likes Received:
    21
    Joined:
    Jan 9, 2003
    Ive never mis shifted, wanna know why?

    I have an automatic... or did, kinda sorta...
     
  9. Bl6CRX

    Bl6CRX Senior Member

    Messages:
    1,553
    Likes Received:
    0
    Joined:
    Jul 14, 2003
    Location:
    UCLA
    ouch! yeah when we were tunning my friends' car, a toda stage 3 cam snapped in 5 pieces and a valve shot out of the megaphone and went flying across the floor!, it sounds like the damage will be minimal with being able to drive it home with no bad noises and all...
     
  10. D See 2

    D See 2 Senior Member

    Messages:
    2,405
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    Baltimore, MD

    turbo time :)
     
  11. D See 2

    D See 2 Senior Member

    Messages:
    2,405
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    Baltimore, MD
    BACK FROM THE DEAD THREAD!!!

    !!!UPDATE!!!

    I got the head back from the machine shop a few days ago. It turns out that the cam journal was all chewed up from the cam lobes sliding side to side and grinding into them. So they had to hone that out.
    Also, I bent 11 valves. All 8 exhaust and 3 intake valves. They had to be replaced and re-ground to match the head's valve grind.
    Additionally, the pistons were hit on the exhaust side and are getting replaced.
    14 of the 16 Ti retainers had to be replaced. And ZEX (Comp Cams) replaced the exhaust cam free of charge.
    I had to send them both the exhaust cam and intake cam. They checked and tested the intake cam to make sure it was okay. And it was.
    The valve springs checked out okay as well.
    The Head now has:
    -GSR Valves
    -GSR Springs and retainers
    -GSR Cams
    Ready for TURBO!!!!
    We figure that the reason all of this happened, is that the timing belt jumped a tooth or two due to the sudden surge of "downshifting".
    And of course the ppics of the head as it now sits:

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  12. ExplicitSnow

    ExplicitSnow Senior Member

    Messages:
    142
    Likes Received:
    0
    Joined:
    Jul 19, 2004

    just dont shift into 3rd when youre trying for 5th...ive done stuff like that, i went back into 1st trying to get to 3rd...felt like a serious car accident...the car pretty much stopped and whipped me forward...ill make sure never to do that again
     
  13. reckedracing

    reckedracing TTIWWOP VIP

    Messages:
    21,057
    Likes Received:
    1,180
    Joined:
    Dec 5, 2002
    Location:
    NY
    damn...

    i can't believe you were able to drive it home...

    HOLY FUCK...
     
  14. asmallsol

    asmallsol Super Moderator

    Messages:
    8,074
    Likes Received:
    3
    Joined:
    Sep 28, 2002
    Location:
    Houghton/Livonia Michigan

    werd.
     
  15. pissedoffsol

    pissedoffsol RETIRED

    Messages:
    49,693
    Likes Received:
    54
    Joined:
    Sep 28, 2002
    Location:
    Retirement Home
  16. D See 2

    D See 2 Senior Member

    Messages:
    2,405
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    Baltimore, MD
    i guess i have someone watching over me. :thumbsup:
     
  17. D See 2

    D See 2 Senior Member

    Messages:
    2,405
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    Baltimore, MD
    also, here's what most of the Ti retainers looked like...
    The more i think of it, my motor had to tach out way beyond 10k...

    [​IMG]
     
  18. asmallsol

    asmallsol Super Moderator

    Messages:
    8,074
    Likes Received:
    3
    Joined:
    Sep 28, 2002
    Location:
    Houghton/Livonia Michigan
    b, where is the spread sheet that you type in the tranny and tire size, and it tells you all the diffrent speeds at verious RPMs. I would like to put 115 as the speed for third gear, see what RMP he was at.
     
  19. nfn15037

    nfn15037 Senior Member

    Messages:
    670
    Likes Received:
    0
    Joined:
    Mar 1, 2004
    Maybe you should check the installed height of the valvesprings to prevent bind and cam breakage in the future......nice that they replaced the cam though!
     
  20. D See 2

    D See 2 Senior Member

    Messages:
    2,405
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    Baltimore, MD


    a well known machine shop installed the springs so as far as i know everything was at spec. The reason the exhaust cam broke was because all valves hit pistons.
     
Verification:
Draft saved Draft deleted

Share This Page