What is used as coolant in the radiator of 1994 4runner? water or something else?

Most radiators have a 1/4" drain cock at the bottom of the reservoir.



If not??? (haven\'t seen one yet) then remove the bottom hose.



Make, year & model of the vehicle will help. And if the radiator is original.

Its not too difficult. The is a canister that contains the coolant. Just undo the cap and top up. Be sure you use coolant to the same specs that is already there. If not, you'll have to drain out the old one and top up with completelty new coolant

The water pump is enclosed on the front of the engine. The bottom radiator hose connects to the water pump inlet.
You do not add coolant to the water pump. You add a 50-50 mix of antifreeze and water into the radiator cap opening. Or you can buy the coolant already mixed with water and just pour it into the radiator.

The coolant system uses the water pump to circulate the coolant through the engine and then into the radiator via the upper radiator hose for cooling it off, and it then goes back into the engine through the bottom radiator hose. When the engine is warmed up, the coolant constantly circulates through the engine to radiator and back into the engine.

what i did was use some printer ink "yellow" and put it in my radiator. its water soluble and then ran it for a day and i found the leak at the water pump bearing im not shure where yours might be but this will help you locate it. hope this helps. take care.

Stop leak is a temporary solution and never a long term fix. You need to locate the source of the leak and replace the faulty part. I also doubt that the coolant overflow reservoir is leaking unless something has been done to the vehicle to damage it.

Using water rather than the correct spec coolant mix as a top up is NOT recommended (even for a short period) because, among other things, the coolant mix provides lubrication for the water pump. Constantly adding water rather than the correct coolant mix dilutes the coolant mix and it becomes ineffective.

Your engine needs an efficient cooling system to survive so have the leak investigated and fixed saspo.
If you allow the engine to overheat you will cause very expensive engine damage and end up with a car you will not be able to drive. It is always cheaper to fix the problem.

unscrew the freezeplug located on the bottom corner of the radiator

Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005 Water Pump - Removal & Installation 4.8L, 5.3L & 6.0L Engines

1. Remove or disconnect the following:
   Air outlet duct Coolant Inlet radiator hose from the water pump Upper fan shroud Cooling fan and clutch assembly Drive belt Radiator outlet hose from the coolant pump Surge tank hose Heater hose Water pump
   
   
   Fig. Exploded view of the water pump assembly-4.8L, 5.3L and 6.0L engines
   

To install:

NOTE DO NOT use cooling system seal tabs (or similar compounds) unless otherwise instructed. The use of cooling system seal tabs (or similar compounds) may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine overheating and/or damage to the cooling system or the engine components/assembly.

1. Install or connect the following:
   Water pump. Install the water pump bolts. Tighten the water pump bolts first pass to 11 ft. lbs. (15 Nm); tighten the bolts final pass to 22 ft. lbs. (30 Nm). Water pump drive belt pulley and bolts (if applicable). Tighten the pulley bolts first pass to 89 inch lbs. (10 Nm); tighten the bolts final pass to 18 ft. lbs. (25 Nm). Surge tank hose Heater hose Outlet radiator hose to the coolant pump Drive belt Cooling fan and clutch assembly Upper fan shroud Inlet radiator hose to the water pump Air inlet duct Coolant

1. Remove or disconnect the following:
   Air inlet and outlet duct Coolant Inlet radiator hose from the water pump Upper fan shroud Cooling fan and clutch assembly Drive belt Radiator outlet hose from the coolant pump Surge tank hose Heater hose Water pump
   
   

To install:

1. Install or connect the following:
   Water pump. Install the water pump bolts. Tighten the bolts to 11 ft. lbs. (15 Nm) for the first pass; then tighten to 22 ft. lbs. (30 Nm) for the final pass. Water pump drive belt pulley and bolts (if applicable). Tighten the bolts to 89 inch lbs. (10 Nm) for the first pass; then tighten to 18 ft. lbs. (25 Nm) for the final pass. Surge tank hose Heater hose Outlet radiator hose to the coolant pump Drive belt Cooling fan and clutch assembly Upper fan shroud Inlet radiator hose to the water pump Air inlet and outlet duct Coolant

Hope this help to solve it (remember comment and rated this).

please rate, thx Coolant Recovery System NOTE: When the water thermostat (8575) is closed, there is no flow through the radiator coolant recovery reservoir (8A080).

Trapped air in the cooling system must be removed. A pressurized radiator coolant recovery reservoir system is used which continuously separates the air from the cooling system.

• When the water thermostat is open, coolant flows through the small hose from the top of the radiator outlet tank to the radiator coolant recovery reservoir.
• The radiator coolant recovery reservoir separates any trapped air from the coolant and replenishes the system through its radiator coolant recovery hose to the water thermostat housing.
• The radiator coolant recovery reservoir serves as the location for:
  • service fill
  • coolant expansion during warm-up
  • system pressurization from the pressure relief cap and
  • air separation during operation
• The radiator coolant recovery reservoir is designed to have approximately 0.5-1 liter (0.53-1.06 quarts) of air when cold to allow for coolant expansion.

If you are blowing coolent out around the drive belts you have a bad water pump. Use a repair manual and replace.