on the 94 there is a bleed valve on the top of the intake manifold right next to the air idle control valve. it is just a bolt sticking up. check out the haynes repair manual. they show a nice pic of it.
There is no reason to ever bleed a cooling system.
The cooling system of a BMW 318i is bled by opening the radiator cap and squeezing the upper radiator hose. This purges air from the system which can then be replaced with more coolant.
If a head gasket is bad, the pressure of combustion can be transferred into the cooling system. The addition pressure in the cooling system can blow out the radiator. Assuming your not replacing it with a used one. Used radiators are usually temporary.
Low coolant? Cooling fan not working? Radiator plugged or restricted? Water pump not circulating coolant? System air bound? Defective radiator cap?
you might want to check for a blown head gasket or a cracked head or block. espically if it loosing water out of the radiator with out leaking on the ground.
Air in the system. Bleed the cooling system and remove any trapped air pockets.
you may have trapped air in the cooling system..try bleeding the cooling system
The cooling system.
Once the cooling system has had time to depressurize, open the radiator cap and pour your coolant in.
The radiator is part if the cooling system.
Motor cooling system? The engine cooling system consits of the water pump, radiator, hoses, cooling fans, etc.Motor cooling system? The engine cooling system consits of the water pump, radiator, hoses, cooling fans, etc.
Rust and sediment can accumulate in the cooling system. Flushing the radiator helps keep the cooling system clean.