it is inside the steel pipe in front of the throttle body. Just follow the upper radiator hose from the radiator. It will lead you to the thermostat housing.
Don't know what year you have but some sensors are temperature sensitive and you should run a 195 degree thermostat.
Yes it will bolt right up to it.
It should be on the front of the intake manifold directly above and behind the water pump.
The fuel lines around the filter; you will need an adapter.
.043
.43L. 1000ml=1L
4L60/E l
43L of 18-k gold
There is one before and one after the catalytic converter.
The EGR valve on your Astrovan is on the backside of the intake manifold just under the throttle body attached by two bolts. After installing a new gasket be sure and torque the BOLTS to 17-18ft lbs or the NUTS (if yours has studs) to 15ft lbs)
There is no adjustment required, but you can clean it with a carb cleaner.
0 degrees,should say right on the fan shroud on the same sticker that tells the spark plug gap. In order to time it correctly you must unhook the esc electronic spark control wire which is a tan wire with a black stripe located under the black cover on the passenger side firewall. It may set off a service engine soon light. When your done timing it unhook the battery cable and the light should go out.