Oil rings - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Oil rings by cervelorod on 08 Jun, 2014 21:10
• I am assembling a CY motor that has been honed and hot tanked with stock pistons and new goetze rings.  I cannot get the oil ring compressed enough to slide the piston into the cylinder.  The ring itself is sized fine, but with the coil spring underneath it on the piston I can't get compressed.  Is there a special German adjective I need to know because I've used all the English ones without being successful..  My ring compressor isn't a top quality unit, but it can compress the top 2 rings without any problems.
  
  Thanks,
  Rod
• #1 by Toby on 08 Jun, 2014 21:38
• Have you fitted the rings into the bore and measured the end gap? What was it?
  
  Have you cleaned ALL of the carbon out of the ring grooves?
  
  have you checked to be sure that the rings will go deep enough into the ring groove to be below the piston outside diameter?
  
  Did you knock the ridge out before you honed the block?
  
  Try fitting the oil ring to the spot above where the rings ride and see what the end gap is there.
  
  If all of the above are all right you may need to tap on the area where the rings are on the OD of the ring compressor with a hammer handle as you tighten the ring compressor.
• #2 by cervelorod on 08 Jun, 2014 21:45
• Quote from: Toby on 08 Jun, 2014 21:38

  Have you fitted the rings into the bore and measured the end gap? What was it? Within spec, but don't have the numbers in front of me.
  
  Have you cleaned ALL of the carbon out of the ring grooves? Yes, they were cleaned and graphite coated by a shop in Auburn.
  
  have you checked to be sure that the rings will go deep enough into the ring groove to be below the piston outside diameter?   Without the coil spring underneath the oil ring it will, I can compress by hand to get it into it's bore.
  
  Did you knock the ridge out before you honed the block?  Yes
  
  Try fitting the oil ring to the spot above where the rings ride and see what the end gap is there.
  
  If all of the above are all right you may need to tap on the area where the rings are on the OD of the ring compressor with a hammer handle as you tighten the ring compressor.   I need three hands, LOL.  I will try that tomorrow
  

  
  Thanks!