The engine coolant drain plug in a 4-cl 1996 Mazda can be found under the hood in front of the passenger seat area. You will see the pipe protruding through the firewall near where the glovebox is.
The Engine coolant drain plug on a 1996 Mazda is easy to find. Crawl under your car and look at the radiator. If your feet are sticking out the front and your head is facing the back it will be on the bottom of your radiator on the right side.
The engine coolant drain plug in the 1996 Ford Probe 4-cylinder is located at the bottom end of the radiator. There is a coolant reservoir at the top of the engine as well.
The engine block coolant drain plug on a 350 Chevy Tahoe is above the oil pan, mid engine on driver's side
It is not repairable it needs to be replaced\Should be located in a removable housing at the engine end of the upper radiator hose Drain about 1 gallon of coolant from the radiatorRemove this housingNote how thermostat is installedClean both surfacesReplace thermostat and gasketRe-fill coolant slowly to prevent an airlockStart engine and look for leaksRun engine to normal operating temperature with heater onRe-check coolant level
Drain coolant from radiator plug located either at bottom or rear of radiator Re-fill slowly to prevent an "airlock"
The Engine Coolant Temperature sensor is on the back of the engine, right in the middle (and unfortunately the most difficult place to reach!). It is mounted on the coolant outlet that connects to the heater hoses up on the firewall. It is connected by a single electrical harness and screwed in. I can't remember exactly, but I believe you can get at it with a 17mm wrench size. The same answer will apply for 1990-2005 Mazda Miatas.
The 1996 Deville drain plug is in the bottom of the radiator close to the bottom hose. It is in a very hard place to reach.
You can find an exploded view of the 1996 Mazda Millenia 2.5 liter engine at most Mazda dealerships. You can also find the exploded view in most Mazda service manuals.
In the engine bay
open da hood. see the coolant resevoir? under that is the lower radiator hose. follow it to where it goes into the engine, and under that flange is the thermostat
Perhaps low coolant level Perhaops thermostat is not opening allowing coolant flow through the engine
Drain the coolant, remove belt, remove two bolts & water pump. Clean the sealing surfaces. Reinstall in reverse order
It is part of the right side lower mounting.