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

• comparrison by shegel on 05 Dec, 2007 18:21
• what is an easy way to tell if a car has a 1.6 hydro head or a mech head...im considering the 1.6/1.9 franken motor.
• #1 by vanagonturbo on 05 Dec, 2007 19:52
• easy way is to notice an extra oil return galley between cylinder one and two. It is similar to the oil return between three and four but a little bit smaller.
  
  I think you will need to look for a hydro block and not the head if you intend to build the 1.6/1.9 combo.
• #2 by shegel on 05 Dec, 2007 20:04
• Quote from: "vanagonturbo"

  easy way is to notice an extra oil return galley between cylinder one and two. It is similar to the oil return between three and four but a little bit smaller.
  
  I think you will need to look for a hydro block and not the head if you intend to build the 1.6/1.9 combo.

  ok...but is that the easiest way to tell if i have a hydro engine or a mech engine.
• #3 by vanagonturbo on 05 Dec, 2007 20:34
• yes. Yours should be hydro if its original. I have seen scarier things though. I have a rabbit truck at the shop right now and it should have a 1.6l in it but alas, it has a 1.5l.
• #4 by burn_your_money on 05 Dec, 2007 22:00
• 86 is the change over year, it could be either
• #5 by shegel on 06 Dec, 2007 09:22
• pre-?=mech
  
  post-?=hydro
• #6 by jtanguay on 06 Dec, 2007 09:35
• mechs are louder and have a little extra power.  there might be a sticker somewhere on the car that says you need to adjust the valves every 15'000km or however many miles.  if it doesn't have this it could have just worn off, but is probably hydro.
  
  hydro pro's: no valve adjustment
  hydro cons: sticky valve lifters
  
  mech pro's: more power, no sticky valve lifters
  mech cons: need to adjust valves on a regular basis.
  
  i wonder if using really good oil could reduce the wear on the shims & cam... hmmm
• #7 by shegel on 06 Dec, 2007 09:42
• Quote from: "jtanguay"

  mechs are louder and have a little extra power.  there might be a sticker somewhere on the car that says you need to adjust the valves every 15'000km or however many miles.  if it doesn't have this it could have just worn off, but is probably hydro.
  
  hydro pro's: no valve adjustment
  hydro cons: sticky valve lifters
  
  mech pro's: more power, no sticky valve lifters
  mech cons: need to adjust valves on a regular basis.
  
  i wonder if using really good oil could reduce the wear on the shims & cam... hmmm

  
  
  im really hoping i have the hydro head....if i look on the car for when its made when did they go to the hydrolic head.
• #8 by burn_your_money on 06 Dec, 2007 10:16
• Quote from: "shegel"

  pre-?=mech
  
  post-?=hydro

  
  
  pre-86=mech
  
  post-86=hydro
  
  VW makes it difficult once again
  
  Read this thread and if you still have questions keep asking