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  • #1

    1.7 Rocker arm bolt failure

    Well, it's been a nice week driving my car around with the new Comp Cams Pro Magnum 1.7 Roller Rockers. Leaving class today, everything was fine. Car felt great, made no noises or anything. Then as I'm getting on the interstate I notice a rocker arm clattering pretty loud. Get home and this is what I find:

    http://www.leadingedgesim.com/mkapro...ockerBolt1.jpg
    http://www.leadingedgesim.com/mkapro...ockerBolt2.jpg
    http://www.leadingedgesim.com/mkapro...ockerBolt3.jpg

    The head of the bolt popped right off the shaft. You can see the head in the last pic. Thank god it didn't go any further into the motor.

    All the bolts were torqued to spec (25 ft*lbs according to the instructions from ZZP, and confirmed with Zooomer before the install), and all the others are still tight.

    Does anyone have a clue what the hell happened?
    Matt
    1998 Mystic Teal Camaro M5
    Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.
    Tags: None
  • #2
    Looks like a casting failure with the bolt. Even reputable companies like comp screw up sometimes.

    Call zoomer, rip his ***, get another one for free.

    Inspect the hell out of that cylinder head to make sure there is no metal debris floating around in the oil. THere will be nothing worse than fodding out an engine and spinning a bearing because of negligence.
    1999 red camaro v6 M5: with a turbo<br />13.52@107.99<br />No, seriously: Who Farted? <br /><a href=\"http://www.cardomain.com/memberpage/600086\" target=\"_blank\">http://www.cardomain.com/memberpage/600086</a>

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    • #3
      Originally posted by malice10985:
      Call zoomer, rip his ***, get another one for free.
      I don't know about that. When I was first installing them, I was stupid and accidently messed up a different bolt. I talked to him and he sent me a replacement. After waiting for a week I gave up and had him send me one via Next Day delivery, but I had to pay $25. 3 weeks after he says he sent the original replacement, I've yet to receive it. Maybe it did get lost in the mail or something, but my patience with these damn rockers is gone. I'm not really complaining about having to pay for the shipping...it sucks, but it was my fault so that's fair enough. What annoys me is that I never got the original bolt. I honestly don't know if he ever really sent it.
      Matt
      1998 Mystic Teal Camaro M5
      Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.

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      • #4
        Ok, I just heard from Zooomer. I'm gonna send the rockers back for a refund until they get Grade 8 bolts (instead of the current Grade 5).
        Matt
        1998 Mystic Teal Camaro M5
        Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.

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        • #5
          maybe use a telescoping magnet through the spark plug hole to fish out ant metal debris in the cylinders on that side of the engine. fish around in the head while the valve cover is off as well.

          bummer.
          01 Firebird A4 3.42
          Powerdyne @ 6 PSI
          and other mods
          Visit Project Unleashed for guides and info.

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          • #6
            Change the oil when you put the car back together, then change again after a few hundred miles. That should take care of anything that got into the engine.

            - Justin
            <a href=\"http://www.njfboa.org\" target=\"_blank\">New Jersey F-Body Owners Association</a><br />1987 Camaro LT - 400sbc, Aluminum L98\'s w/valve job, Comp XE 274, Q-Junk 750, 3.23 posi, 4.10\'s soon.<br /><br /><a href=\"http://www.njfboa.org/forums/viewforum.php?f=11\" target=\"_blank\">East Coast F-Body Nationals - August 14, 2005</a>

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            • #7
              Would you be able to just buy some grade 8 bolts from the hardware store, and possibly even have zoomer just refund you the cost of the bolts? It wouldnt be more than like $15-20 for 12 grade 8 bolts. That'd save you the time of reinstalling the old rockers, and then doing the same process all over again in a few months. I'd imagine they use a standard threading and size you could pick up from home depot or something.
              AIM: Alientr8tr<br /><a href=\"http://www.cardomain.com/memberpage/583450\" target=\"_blank\">1998 Camaro 3.8L</a><br />Flowmaster 80-series, !FRA, Eibach Springs, KYB AGX, SLP sway bars, 3.42/LSD, Wings West kit, Z06 Motorsports, Silverstone Metallic paint<br /><a href=\"http://www.shift5.com/\" target=\"_blank\">Shift 5</a> - My Band

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              • #8
                Originally posted by AlienInv8r:
                Would you be able to just buy some grade 8 bolts from the hardware store, and possibly even have zoomer just refund you the cost of the bolts? It wouldnt be more than like $15-20 for 12 grade 8 bolts. That'd save you the time of reinstalling the old rockers, and then doing the same process all over again in a few months. I'd imagine they use a standard threading and size you could pick up from home depot or something.
                doint go to home depo for parts this important and that take alot of stress like these do

                you call ARP and get a set from them
                www.turbov6camaro.com
                1997 3800 Series II Camaro
                4600 Stall for my ride to the mall :chug:
                7.18 @ 99.77 1/8 -1.8x sixty (current quickest v6 fbod)
                11.23 @ unk 5 1/4 - 7.19 1/8 - 1.83 sixty

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                • #9
                  They're not standard bolts. Probably specially made or something.

                  The car is now running with the stockers back on. I miss the rockers, but I'll be glad to get rid of the constant trouble they've brought.
                  Matt
                  1998 Mystic Teal Camaro M5
                  Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.

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                  • #10
                    Glad the car is running and seems OK. Hope you get the 1.7s back in, that should be a nice little gain.
                    2001 Firebird 3.8L V6 M5,<br />It once had....<br />NX Nitrous Wet Kit, ZZP X-P Hot Cam, <br />3.42 LSD, Pacesetter Headers, <br />36# Injectors, HP Tuners<br />322 RWHP, 379 RWTQ<br />13.596 @ 102.56 w/100 shot

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                    • #11
                      Get up, put on your clothes and shoes, get in a car that runs, and go to look around. I'll almost bet there will be a bolt store somewhere close to you that has exactly what you need.
                      <b>Black</b> 1998 Pontiac <i>Firebird</i> A-4 swap<br />271.4rwhp/259.4rwtq NA<br />13.30@102.44 <br /><a href=\"http://www.freewebs.com/wickedsix98\" target=\"_blank\">www.freewebs.com/wickedsix98</a>

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                      • #12
                        I'd bet most performance shops around you would have grade 8 bolts. Good luck, sorry to here bout this.
                        2001 Arctic White Firebird With Black Drop Top<br /><br />3:42 Gears<br />Zexel LSD<br />BMR upper A-Arms<br />Trans Am exhaust with 3\" I-pipe and cutout<br />Modified intake<br />Mecham Hood<br />Trans Go shift kit<br />Making rear control arms and panhard

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                        • #13
                          hmmmm? That's usually the end result of over torque, but they were torqued specifically ??? Probably a bad lot, but then again grade 8 sounds better than 5. Good luck to ya
                          BLAHHHH!<br /> <a href=\"http://members.cardomain.com/chris98\" target=\"_blank\">http://members.cardomain.com/chris98</a>

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