1.6TD CY, 5spd G1, rattle on engine decceleration - Troubleshooting - VWDiesel.net The IDI, TDI, and mTDI source.

• 1.6TD CY, 5spd G1, rattle on engine decceleration by kljaja on 04 Oct, 2016 02:00
• Hello, my first post here and of course its about something thats bad.
  
  I've got 1984 TAS Golf 1 thats been converted to 1.6TD CY engine code and 5 speed gearbox mated to it.
  The thing is that since i've bought it, it has a wierd rattle when i rev the engine high and let go off the throttle. Also, the engine seems to vibrate more than it should on higher engine speeds...
  When im standing still in neutral, rev the engine high and let go off the throttle, the rattle is heard from the engine bay directly in front of me (gearbox area) and it sounds like a bearing thats shot and is slowing down with grinding noise because of too much friction, or an angle grinder thats been turned off, it slows down as revs go down.
  When im moving, lets say accelerating with WOT, every press of the clutch to change gear that same sound is heard but more violent, it has the patter of BOV sound on a gasser engine. It is also heard when going constant speed at high revs leting off the throttle and pushing the clutch pedal. Letting of the throttle without pushing in the clutch pedal the sound is not heard, although engine seems to vibrate more than it should.
  
  Engine mounts are like new, it doesnt rattle with hanbrake engaged in reverse or 1st gear.
  I am thinking of flywheel or some of the bearings near it, as flywheel would have that grinding rattling decelerating pattern as revs go down, and vibrating at higher engine speeds.
  
  I'll try to catch that sound on camera, but I doubt it'll be possible with all the IDI noises
  Thing is I am not much of mechanic and have little tools to work with, so Im trying to narrow down the problems to spend as little time and effort at mechanics shop.
  Cheers!
  
• #1 by TylerDurden on 04 Oct, 2016 07:36
• First, I'd check all the heat shields... those can rattle like crazy.
  
  Can you expand on this: "it doesnt rattle with hanbrake engaged in reverse or 1st gear." ?  Is that with engine loading or...?
  
• #2 by kljaja on 04 Oct, 2016 14:26
• Quote from: TylerDurden on 04 Oct, 2016 07:36

  First, I'd check all the heat shields... those can rattle like crazy.
  
  Can you expand on this: "it doesnt rattle with hanbrake engaged in reverse or 1st gear." ?  Is that with engine loading or...?
  

  
  
  jerking the car with handbrake on while letting of the clutch eather in 1st or reverse doesnt make it rattle so i guess engine mounts are not a problem..
  
  I think i managed to capture the rattle sound on video today, listen carefully when clutch is pressed
  
  newbielink:http://www.youtube.com/watch?v=kXjVQqldw1E
  
  
• #3 by TylerDurden on 05 Oct, 2016 07:06
• That don't sound so good.
  
  Since you can make the sound happen without driving, I'd blip the accelerator in the engine bay and probe around with a mechanic's stethoscope.
• #4 by kljaja on 10 Oct, 2016 06:57
• Few people told me that it's the pressure bearing (?)/ "druck lager" ...Its up for a swap with clutch pack this week so im going to post results!
• #5 by fatmobile on 18 Oct, 2016 14:40
• Same sound with the clutch in or out?
• #6 by kljaja on 18 Oct, 2016 15:11
• Mech changed the cluctch pack with the pressure bearing, even tho the clutch was in mint condition, no more rattles, also the bar that pushes the pressure plate is swapped with the longer one so that clutch grabs at the top of the pedal