Answering "Where is engine coolant drain plug for a 1.8 Nissan sentra engine?"
The location is engine specific. Which model Sentra do you have and which engine does it have?
NO SE TU....
PUT IT IN THE RADIATOR. MAKE SURE YOUR ENGINE IS COOL AND USE THE DRAIN COCKPIT LOCATED ON THE BOTTOM OF YOUR RADIATOR TO DRAIN ENOUGH OF THE FLUID TO ACCOUNT FOR HOW MUCH ANTIFREEZE YOU ARE ADDING.
at the bottom of radiator
No, the only way to drain a fuel tank is to take the tank off, or to syphin the gas out.
From the drain plug located at the bottom of the radatior
Should be a drain plug either at bottom or rear of radiator or remove lower hose
It is located on the bottom or bottom side of the radiator. You will actually turn the stem to drain your radiator.
Has the Sump drain plug been put back in and tightened
Normally on the bottom of the radiator. You can always just remove the lower radiator hose to drain it.
The oil drain plug is located on the deepest part of the oil pan.