[Vwdiesel] aaz

[Roger Brown]

On 2/7/2011 9:34 AM, Bryan Belman wrote:
> From what I have learned over the years, the bottem end of the 1Y is
> different, the case is stamped 1.9 D, the AAZ bottom end is stamped 1.9 TD.
> That says enough for me.  The heads are the same, for sure.  Bottom ends are a
> bit different, I have heard rods and pistons are different, the TD block has the
> boss tapped for the oil return line coming down from the turbo, on the 1Y, the
> boss it there, but not drilled or tapped.
> 1Y most likely doesn not vent crank case back up to the breather ontop of the
> Valve cover plate, I took the breather hose, or flattened plastic thing, off an
> AAZ and put it on my 1Y.  Not sure if it helped any, but I did it.

On my 1Y, there was a breather fitting down on the bottom of the block, not sure if it was 
original or added by the shop that installed the engine for the PO of the vehicle.  I 
suspect it may have been added as that fitting has traces of the old green block paint on 
it and the 1.9D block is painted black.

In any event, the fitting was there, but the gasket behind it had no hole in the center. 
I drilled out a hole and attached a breather hose to it and ran that up to the valve cover 
breather, that is apparently off an early TDI:
	http://www.4crawler.com/Diesel/Images/vw82_engine.jpg

-- 

   Roger