between 205 and 212
Normally between 232 degrees to 235 degrees.
No onions will not turn any stock sour. A stock can turn sour if left at room temperature for around 24 hours with or without onions.
It is on the intake manifold near the thermostat.
Warning lights come on when there is an issue. A Oil change light with turn off when an oil change has taken place.
I beileve its located under the driver side of the dash up by sterring colum
Cooling fan should come on either when coolant temperature reaches 235 degrees or the A/C or defroster is turned on
If you are asking about the engine thermostat, they are not adjustable. You buy them by the temperature setting.
Press and turn
The turn signal relay for a 1981 Camaro should be mounted in on the fuse box. It is on the upper left hand corner.
A Haynes Manual will give you that information and more. You can buy one at a parts house or bookstore.
On the turn signal stalk
Behide the stereo