From your signature line, you should be the teacher with your experience
.
If I were to do this in advance of a leaky head gasket replacement....
(I would wait awhile unless you have already done the HG)
I would remove the intake manifold because it is easier to work on.
Now would be the time to send out the injectors to
www.whitchhunter or do a DIY clean from the
tech info center instructions above.
Replace all the pinch OEM clamps on the big vacuum hoses with injector clamps or non perforated screw type.
Have new rubber mounts for the ICV/ISV valve and clean the valve. Replace the heater control valve if it is old and has a white deposit on the pivot. Change the small coolant tube above the heater control valve. Put a piece of tape over the TDC hole on the bell housing.
Regap the sensors. Clean the grounds on the bell housing. Put a piece of tape over the TDC hole on the bell housing (2nd time mentioned).
Oh and then remove the AOS to replace the 2 "O" rings.
There are a few things I missed but you will notice them when they break or have deterioated.
GL
John_AZ
1988 924S + 1987 924S DD
1979 924 + 1977.5 924 + 1970 914 1.7 +++===gone, past tutors