On the passenger side of the block at the rear of the motor.
There are block coolant drains on both sides of the block. Drivers side block drain is towards the front and the passenger side is towards the rear. They take a large allen wrench to unscrew.
To circulate coolant through the engine block, radiator and passenger compartment heater core.
No, I would suspect a stuck open thermostat, a failing (worn) water pump or clogged heater core. Also chedk for a sticking heater control valve in the coolant circuit if fitted. It could also be a internally swelled heater hose from the block to the heater core blocking proper coolant flow..
YES. If you look at the passenger side of the engine block just in front of the starter you will see a small plug that is screwed into the side of the block. That is a coolant drain plug so you can get all the coolant out of the block. Remove it and screw the knock sensor in it's place.
Assuming this is a 4.3 engine, remove the block coolant drain plugs. There is one on each side of the block. The passenger side is towards the front of the block and the drivers side is towards the back.
check your sensor on the back of the engine block and under the intake manifold, passenger side. check your sensor on the back of the engine block and under the intake manifold, passenger side.
If this still has the factory motor it should be either a 3.0 V6 or a 4 cyl. Both of them should have the freeze plugs located in the side of the block. It is identifiable by the circle shaped "cups" inserted into the side of the block.
Drain coolant from radiator and engine block Remove passenger's side rear freeze plug and replace with block heater kit
Follow the top radiator hose back to the engine block. The thermostat is usually behind the housing that connects the radiator hose to the engine block. To be more specific Its on a housing on the passenger side of the engine block.
If you mean drain holes for coolant... There is one located at bottom of the radiator. And two more on each side of the engine block.
The 2002 Tacoma engine block will have two coolant drain plugs on each side of the block. The coolant drain plugs will be near the front and the rear of the engine block.