RedBelliedJet

<center><img src="http://pictureposter.audiworld.com/54386/img_3128.jpg"></center><p>I bought a motor for my Urquattro which has a WX block, but has a hydraulic lifter head. The casting number is: 035-103-373AB. It also has the fitting (top far right in photo) that my old WX didn't. Just to satisfy my curiosity, what engine code would this head correspond to?

Thanks,

Black-Wolf

not sure about codes but looks like my mc2 head fitting and all..

cuatrokoop

There is one key difference, the newer heads have an irregularly shaped passage, and cannot be used on the older blocks (they'd leak).

RedBelliedJet

I don't know, because the motor was rebuilt before I got it, and I am not planning on separating the head from the block (if it ain't broke, don't fix it), but I thought all MC's had the straight -373 casting instead of -373AB. Also, there is a manufacture date on it, and it looks like it says 12/3/84 just above the #5 spark plug, but it's kinda hard to read.

Suffolk

I'm thinking close up picture would help.

RedBelliedJet

<center><img src="http://pictureposter.audiworld.com/54386/img_3151.jpg"></center><p>I'm not sure which part would be helpful, so let me know if you need another shot. Thanks for the help!

RedBelliedJet

<center><img src="http://pictureposter.audiworld.com/54386/img_3152.jpg"></center><p>

RedBelliedJet

<center><img src="http://pictureposter.audiworld.com/54386/img_3154.jpg"></center><p>

RedBelliedJet

<center><img src="http://pictureposter.audiworld.com/54386/img_3153.jpg"></center><p>