Username or Email Address
Do you already have an account?
Forgot your password?
  • Log in or Sign up

    VWVortex


    Results 1 to 4 of 4

    Thread: V6 Passat, Loud Clacking or Tapping from Cylinder Head

    1. 08-16-2012 11:38 AM #1
      The other day, prepping to go up the mountain, and the car starts making a loud, regular clacking from the driver's side cylinder head area.

      I knew I needed to replace the timing belt, so I figured this was a good time to do it. Ordered the kit, getting everything done just right, but I now have a question.

      The camshaft lock lined up correctly when I was taking it down, and it lined up correctly putting it back on. Everything looks dandy. However, turning the crank, I still get the clanking or rattle coming from the same spot in the cylinder head. Turn the crank by hand (slowly) and it goes goes, clatter, goes goes goes, clatter. It's like there's a little shot glass with a marble in it that tips over slowly.

      Any ideas? Do I already have a bent valve? Broken lifter, something else? A little hamster's bleached skull rattling around loose?

      I'd like to know if now is a good time to take apart the cylinder head, since the new timing belt is still exposed and I could get it off and back on the camshaft pulley if I needed to in order to remove the camshaft.

    2. Member koidragon1980's Avatar
      Join Date
      Jul 8th, 2011
      Location
      Astoria, NY
      Posts
      649
      Vehicles
      2001.5 VW Passat V6 FWD (RIP), 2007 Saab 9-3 2.0T 6spd manual
      08-16-2012 02:24 PM #2
      my first guess would be the cam chain tensioner/lifter. it tends to be the usual source of knocking or clacking sounds on our cars.

      with the valve cover off, it's the front driver-side... inspect the plastic guide the chain moves along. those can become worn and or break and cause knocking from the chain due to a tiny amount of slack from the wear.

      the parts aren't the cheapest and the work isn't the easiest, but if it's your problem, it's not as bad as bent valves or rebuilding heads.

      if you notice any of the plastic guide on the lifter missing or looking broken, then you might have to take the time to pull things apart further and inspect for the missing pieces. i've heard stories of a broken guide making it's way in the cylinders and causing the same type of damage a broken timing belt would.
      God bless the homicidal maniacs... they make life worthwhile. - George Carlin

    3. Member koidragon1980's Avatar
      Join Date
      Jul 8th, 2011
      Location
      Astoria, NY
      Posts
      649
      Vehicles
      2001.5 VW Passat V6 FWD (RIP), 2007 Saab 9-3 2.0T 6spd manual
      08-16-2012 02:30 PM #3
      if you do the passenger side as well, the chain and lifter are in the rear of that side.
      God bless the homicidal maniacs... they make life worthwhile. - George Carlin

    4. 08-16-2012 06:59 PM #4
      Thanks for the tip. I knew it was in the back on the passenger side, didn't realize it was in the front on the driver side. I may have to pull the valve cover and check it out.

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •