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 thermostat on lower radiator hose?
Coolant & Overflow Hoses The vehicle’s thermostat remains closed upon start up until coolant reaches a designated temperature. To prevent coolant from traveling to the radiator for cooling, the fluid is directed back to the engine block, through an externally-mounted bypass hose.
Should lower radiator hose be cooler than upper?
The water coming out of the rad at the bottom should be cooler than at the top where the hot water is going in. If your temp is getting above normal and the lower rad hose is still cool, then there’s something wrong. The hose with the thermostat usually has the flow out of the engine going into the rad.
Why is my car radiator hot at the top and cold at the bottom?
If your radiators are cold at the bottom but hot at the top, this can only mean that the flow of hot water is somehow being restricted or redirected so it’s not reaching the whole of the radiator. If several channels are blocked, the whole of the bottom part of the radiator will not be getting any hot water.
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.
What to do if top radiator hose is hot?
Remove the thermostat cap, usually on the top hose at the engine. Note the stat’s orientation, it is possible in most cases to fit it back-ways, which causes an overheating condition. Clean the stat seat on the engine and cap. Lube the new stat seal with fresh coolant and fit it, check the orientation (Jiggle valve up).
Is the top of the radiator hot or cold?
You’re in the right place, all your questions are covered here. The top radiator hose is usually but not always the location of the thermostat. Either-way, the top hose gets hot after the thermostat has opened. The time the thermostat takes to open depends upon factors such as:
Why is the thermostat on my Car located on the lower?
I know of a few like this, The primary reason is the manufacturers are controlling cylinder head temperature first. Controlling head temp allows for higher compression ratios and more efficient engines.