those are frost plugs used for machining out passages during manufacturing can also be used to install block heater
On a 2003 Ford Ranger : The 2.3 litre four cylinder engine has a thread on cap on the engine coolant reservoir , that is the pressure cap / radiator cap ----------------------------------------------------------------------------------------------------- On the 3.0 and 4.0 litre V6 engines , I believe there is a radiator cap on the top of the radiator , but with the engine cool you should add engine coolant to the engine coolant reservoir - it has a cold fill mark
It should be at the bottom of the radiator plus there is at least in the engine block.
I'm not sure on that particular engine but it can be found in water jacket on cylinder head, it should have 2 wires and if you remove it there should be coolant behind it.
Look for the radiator drain it should be on the side of the radiator facing the engine next to the fan.
Should be at the bottom of the radiator.
The coolant should circulate through the entire water system.
Most vehicles have a coolant reservoir (a clear plastic tub) with a phrase "engine coolant only" printed on the cap. This is where you should add engine coolant.
The transmission fluid could be leaking into the engine coolant through the transmission cooler in the radiator. You should be able to see the transmission fluid in the engine coolant recovery tank. It will look like a oily film on top of the coolant. White smoke (steam) out of the exhaust indicates engine coolant is leaking into a cylinder.This can be a result of a blown cylinder head gasket or a cracked cylinder head. Have the engine coolant system pressure tested to detect the leak.
Yes , on my 1995 Ford Explorer XLT there is a cold fill mark . When the engine is cold the coolant level should be up to the mark
Look on the side of the coolant overflow bottle. There should be a low mark for the coolant for a cool engine, and one for a hot engine.
it should be in one of the coolant lines leading up to the radiator.
That is the temperature sending unit for the engine coolant and it should be in the drivers side head between the first 2 spark plugs.