Which radiator hose goes to the thermostat?
upper radiator hose
Radiator Hose. Most vehicle cooling systems are comprised of four main hoses. The upper radiator hose is connected to the thermostat housing and to the radiator. From the bottom of the radiator, is the lower radiator hose that is directed to the water pump.
Is the thermostat on the upper or lower radiator hose?
A conventional thermostat is a simple temperature-controlled two-way valve that opens at a specified temperature. In most cars, a thermostat is installed on the engine and is connected to the upper or lower radiator hose.
Why is my bottom radiator hose not hot?
One such reason behind not heating up the lower radiator might be the improper amount of coolant in the engine. The coolant is elated in and out of the radiator by upper and lower hoses. Thus, making the lower radiator hose to heat up. As a result, the lower hose emits cold air.
Should bottom radiator hose be hot or cold?
Once the thermostat opens, hot coolant will flow to the radiator. The top hose will be hit, and the lower hose will be somewhat less so. If the lower hose remains cold, it means that there is a blockage in the radiator.
Why are both radiator hoses hot?
Usually the top radiator hose is connected to the thermostat. The thermostat will open when the engine coolant reaches a certain temperature. If the top radiator hose gets hot quickly, it could mean that the thermostat is opening too early or is stuck open.
Why is my lower radiator hose not running?
If your car is overheating and at the same time won’t heat the lower coolant hose – You most likely have a problem with your thermostat, which needs to get replaced. The thermostat should be closed when the engine is cold and not running.
Where is the thermostat located on a Nissan SR20DE?
Nissan SR20DE (T). All cooling systems have a by-pass from cylinder head outlet to pump inlet. That allows coolant to circulate before the T-stat opens. You will see that the hot return from the by-pass is directed on the T-stat’s wax capsule at the back of the T-stat.
When to close the radiator thermostat when not running?
The thermostat should be closed when the engine is cold and not running. Regulation of water by the thermostat prevents engine hot spots. Once the optimal temperature has been reached, the coolant water will be let into the radiator for energy dissipation.
Where is the thermostat located on my car?
All cooling systems have a by-pass from cylinder head outlet to pump inlet. That allows coolant to circulate before the T-stat opens. You will see that the hot return from the by-pass is directed on the T-stat’s wax capsule at the back of the T-stat. This controls T-stat opening and the temperature of water coming out of the engine.