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    Thread: timing belt then blow up????

    1. 03-12-2012 12:47 AM #1
      i just did a timing belt and head gasket on a 2.8l avant.
      it ran before i did this.
      i got it all back together today and cleared all the fault codes. none popped back up.
      i did a TBA and it went through well and it still idled funny and no throttle response after.
      i was holding the gas to the floor and it started to idle better. then there was a loud bang twice and then it just jumped up to red line and then shut off...

      any input please help.
      Quote Originally Posted by SoIAteAPancakeToday View Post
      it would whisper in your ear, "lrn2offsetbrah."

    2. 03-13-2012 06:24 PM #2
      bump i just had someone on the A4 B5 forum say i blew up the motor and i dont see how that couldnt happened. everything was oiled and this happened in under a minute it wasnt hot or anything. ugh please anyones input please.
      Quote Originally Posted by SoIAteAPancakeToday View Post
      it would whisper in your ear, "lrn2offsetbrah."

    3. Member Slimjimmn's Avatar
      Join Date
      Apr 8th, 2006
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      Rochester, MN
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      02 GTI 1.8t
      04-08-2012 12:01 AM #3
      cam timing off
      valve hit piston
      valve broke off
      engine locked up


      the car is on an inclined driveway and up on jack stands in the front only
      02 GTI 1.8t:> 42DD 3" turboback, BFI full stg1 mount kit, Evoms CAI, Forge boost hoses, Tacotaco sidemount, Ebay TIP, IE 2.0 coil conversion, IE manual tensioner, 20th front brake conversion, IE emissions delete, 42dd catch can, Koni STR.t & WRD sport springs, Samco Coolant hoses, SMF vr6 clutch kit.

    4. Member
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      2012 Jetta Tdi, 2007 Jetta 2.5, 1985 gti 20v swap
      04-17-2012 03:15 AM #4
      no good
      2012 Jetta Tdi
      H&R sport springs
      15% tint
      VW Technician
      VAGCOM equipped, willing to help with it if in pacific NW area. Hit me up.

    5. Member
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      '04 Bugatti wagon, '85 V65 Sabre
      04-19-2012 12:48 PM #5
      I agree, things do not sound good. I'm currently repairing a 30V V6 that had the timing off a notch and it bent two intake valves (cyl1&4). Those pistons are dished and virtually no clearance.
      Good luck.
      Form is temporary; Class is permanent

    6. 04-22-2012 01:56 AM #6
      so if valves are bent but not broken, replacing the valves will solve the problem?

      I mean, the piston looks good in my car, I was wondering if there could be some damage beyond what is visible in such case.

    7. Member
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      '04 Bugatti wagon, '85 V65 Sabre
      04-25-2012 05:46 PM #7
      Typically replacing the valves is all it takes, providing pistons are o.k.. You have to have some proper equipment to do the job, like a spring compressor and a timing bar when you put it back together.
      Form is temporary; Class is permanent

    8. 04-28-2012 05:04 AM #8
      so what exactly makes the difference between bent and broken valves? or is it just a matter of luck?

    9. Member tryin2vw's Avatar
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      99 MK3 and 98 MK3 2.0, '01 B5.5 1.8T
      05-05-2012 09:57 PM #9
      Luck between bent and broken. In the original TB replacement, was the cam-bar/crank pin used to set the timing? Were the cams and chain tensioner installed properly in both heads? These are items that can cause rough idle when replacing heads.

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