1Z/AHU differences - page 2 - TDI Engine -General Info - VWDiesel.net The IDI, TDI, and mTDI source.

• #15 by A2TD on 13 Jul, 2006 12:02
• Quote from: caddy

  head of 1z and ahu are different , valves axle are in 8mm on 1z and 7mm on ahu.
  some 1z tdi engine come with single stane injectors.

  
  
  Not in NorthAmerica.
• #16 by houseofdiesel on 27 Jul, 2006 13:03
• Early north american 1z motors had 8mm valves, up to engine number 770000, after that 7mm. All AHU were 7 mm I think as they came out in 97 not 96 and even the AAZ changed over in late 96 to 7mm valves. Never noticed different injectors though.