Does anybody know where I can get a diagram of the engine with all its components so I can figure out what is what. I am taking out the cylinder head and need help with locating the idle air control valve, manifold air pressure sensor, throttle postion sensor, the four injector connectors, canister purge valve, fuel regulator etc,,, can you use another head from a different year since 1996 was a bad year for Saturn heads... I have a SOHC..

thanks

DM

Heads:
The '91 DOHC head is a freakshow-leave it alone.
91-94 Heads interchange. (compatible with any year block.)
95-98 Gen2 heads - Linear EGR valve, otherwise compatible with 91-94 heads. Compatible with any year block.
99+ Gen3 Heads are NOT compatible with older heads. Completely redesigned. Compatible with any year block.
2000 (or 1999?) - 2002 Have the roller-rocker design with the small ports.

95 Heads do not interchange with any other year correctly. While yes all the heads up to 99 will interchange physically they will not have proper electronics and egr connections. The 95 head is the first year of the electronic egr valve. And the head has two coolant temp sensors. Now the 91-94 had a vacuum controlled egr valve and also had two coolant temp sensors. The egr mount is completely different between the vacuum and the electronic. Now the 96+ heads also came with the electronic egr valve but they only had one coolant temp sensor due to the fact that 96+ years went to the obd II pcm and only called for one coolant temp sensor.

'91-'94 heads can be adapted to later year engines and use the new style EGR valve if you get the adapter from Saturn that was used on 1994 DOHC cars (http://www.saturnfans.com/forums/showthread.php?t=88699#) sold in California, Part#21006753

You can use a '95 DOHC head all the way up to '98 all you have to do is buy one extra temp sender and screw it in the "spare" hole. Alternately, you can install the sender from an Autometer electric coolant temp gauge-it's a direct fit.