I believe it wasn't until 2001 or 2002 that the engine fans on the Detroit diesels came on automatically when the temperature rose. You're probably required to flip the engine fan switch on manually.
That is an engine block heater. It heats the engine coolant.
crack the engine block and oil mixes with water or antifreeze.
It decreases
The 1999 Saturn S-Series engine heats up the coolant, the thermostat valve opens and the coolant circulates between the radiator and the engine. Then the radiator fans turn on to cool it back down. The fans are also turned on when the air conditioner is turned on to aid in cooling the radiator and the air conditioner condensor.
Yes, on most cars it will.
Fuel Pressure Regulator - would do that -
Yes, when the engine heats up or the AC is turned on.
if it is the z32 model more than likely its the variable timing sprocket
The O2 sensor is BAD and needs to be replaced. Whats happening is when the engine is cold the sensor sends an air to fuel mixture signal to the computer that satisfys the engine's requirements at start, but when the engine heats up the sensor then send a leanner mixture (To much Fuel) that the engine can't burn off so the Sparkplugs get wet and misfire stalling the engine.
bad thermostat or bad heat gasket
The gas and water mix up and heats up to make fire.
Check the engine coolant... Is it full? yes coolant level is full