How to get the top radiator hose to be hot?

1 Remove the splash tray and push the coolant catch tray in. 2 Remove the thermostat cap, usually on the top hose at the engine. 3 Clean the stat seat on the engine and cap. 4 Lube the new stat seal with fresh coolant and fit it, check the orientation (Jiggle valve up). 5 Tighten down the cap bolts and torque to approx 10Nm (89in lbs).

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 should my radiator hose feel like after a drive?

While the engine is warm after a drive, squeeze the radiator hoses, paying particular attention to areas where the hose bends. A radiator hose in good condition should feel firm, but not hard. A radiator hose in poor condition feels very hard, spongy, or soft.

How do you check the consistency of a radiator hose?

Touch the hose between your thumb and forefinger to check its consistency. Start with the portion clamped to the radiator and work your way back. New hoses feel firm but not hard and often crinkle when touched. If the hose feels very hard or soft, replace it right away.

How is a cabin heater similar to a radiator?

Cabin heater core – The Core is not unlike a radiator, it’s used to transfer engine heat to the cabin. The heater fan blows air across the core to demist the windshield and/or warn occupants. Thermostat – Used to regulate coolant flow around the engine. The stat remains closed until about 180 deg F, this helps the engine warm up quickly.

Why is my radiator hose warm after a cold start?

If the top and bottom radiator hose are equally warm after a cold start. The thermostat is likely stuck in the open position. John Cunningham is an Automotive Technician and writer on Rustyautos.com.

Why does my car heater keep my toes warm?

Modern cars as you know use computers to control fuel and emissions, but those systems don’t work until the engine is warm. The stat blocks flow so as to get the engine up to operating temperature ASAP. And as the heater core is plumbed on the hot side of the stat, your toes get warm too.

Where does the heater hose go on a small block Chevy?

Heater Hose Routing Small Block Chevy. One of the fittings [the passenger side of intake] goes to the heater core inlet. The hole on the Bigger hose = outlet, smaller hose = inlet. Currently the heater hose goes from the driver side front on the intake.

When do I need to know the heater hose routing?

Discussion in ‘ Engine & Performance ‘ started by Lonewolfwd, Dec 5, 2020 . I have an 03 Ram 1500 with 4.7 and I need to know the correct routing for the heater hoses.

Which is heater hose sends water toward the heater core?

Posts: 11, Does it make a difference which heater hose (upper or lower) is connected to the the same as a standard system except for the engine’s internal fluid routing. The smaller one (5/8″) is the hot and connects to the manifold. Which hose sends water toward the heater core?

Which is heater hose is connected to the engine manifold?

Share to Location: Chevy Chase MD. Posts: 11, Does it make a difference which heater hose (upper or lower) is connected to the the same as a standard system except for the engine’s internal fluid routing. The smaller one (5/8″) is the hot and connects to the manifold.

What does it mean when your radiator hose is soft?

If a radiator hose can be squeezed, it only means there isn’t pressure in the cooling system, but this can indicate a problem. Cooling systems are designed to hold pressure. This raises the boiling point of the coolant so it can run above 212 degrees Fahrenheit. These signs suggest that maybe the thermostat is stuck open.

When did upper radiator hose stop sucking flat?

Discussion in ‘ Engine Topic ‘ started by Philly78LT, May 11, 2005 . Hey guys we replaced the radiator cap and the upper radiator hose and the problem of the hose sucking flat stopped and the car was running at normal temp for awhile.

What causes a radiator hose Cap to collapse?

Engine overheating is not necessarily a cause or effect of a collapsed hose. The most common cause for radiator hose collapse is a vacuum issue caused by a faulty radiator cap. Caps are rated around 14–16 psi.

Why does upper radiator hose keep building up pressure?

Q: Upper radiator hose keeps building up a lot of pressure and popping off. Car loses coolant and over heats. My upper radiator hose keeps building alit of pressure and popping off and car loses coolant and overheats. I changed radiator cap after reading that could be problem. My car has 191400 miles. Hello, thank you for writing in.

What to do if lower radiator hose collapses?

The lower radiator hose is subjected to the most suction pressure so car makers usually install a spring inside the hose to help it maintain it’s shape. However, if someone has replaced the hose and not installed the spring, the lower radiator hose can collapse.

What happens to a rubber radiator hose as it ages?

Rubber radiator hoses degrade over time and lose their ability to hold their shape.Rubber hoses deteriorate with age from the inside out. But they can also be damaged by oil. If you spill oil on a rubber radiator hose, you clean it off. Deteriorated radiator hoses lose their firmness and feel “spongey”.

What are the symptoms of a bad radiator hose?

Symptoms of a Bad or Failing Radiator Hose. Cost of Replacing a Bad or Failing Radiator Hose. Common signs include leaking coolant, engine overheating, the Low Coolant Light coming on, and radiator hose damage or collapse.

Where does the radiator hose attach to the engine?

The upper hose attaches from the top of the radiator to the top of the engine at the thermostat housing. The lower hose attaches from the bottom of the radiator to the water pump of the engine. If you suspect either radiator hose is failing, watch for the following symptoms:

If the top and bottom radiator hose are equally warm after a cold start. The thermostat is likely stuck in the open position. John Cunningham is an Automotive Technician and writer on Rustyautos.com.

What should I use to refill my air conditioner coolant?

If you intend to reuse the coolant, have a little extra to hand for replacement, as a little spillage is inevitable. Most manufacturers recommend a 60 to 40 per cent water and antifreeze mixture. Some specify a 50-50 mix.

Where does the coolant go after draining a radiator?

Instead, a pressure cap is fitted to the system, and a tube leads from the top of the radiator to a glass, plastic or metal tank or container. Coolant which has expanded as the system warms up passes down the tube into this tank, and is drawn back into the radiator when it has cooled.

When to replace a radiator or heater hose?

Heater hoses should be inspected for wear and failures when inspecting other coolant hoses such as the radiator hoses. Occasionally the heater core will trap air inside (post repair) the core producing a bubbling noise which should dissipate. Always clean the hose sealing surface (fitting) to ensure a good seal. Replace hose clamps with new units.

How often do coolant hoses need to be replaced?

Carmakers do not consider coolant hoses a routine maintenance item, so it follows that there can be a lack of guidance about how often these hoses should be replaced. Without a specific mileage point or time interval to use as a reference, it’s crucial that you stay informed about how coolant hoses work and how they wear out.

Where does the coolant go in a hot engine heater?

Heater hoses transfer hot engine coolant into the heater core where it’s processed into warm air and utilized by the heater system. Some systems are designed with a fluid control valve which stops coolant from flowing into the core which should also be replaced with the hose set.

How are the radiator and heater hoses connected?

Radiator hoses are connected to both the radiator and engine to direct coolant to the radiator so it can be cooled and then back into the engine so it can maintain a certain temperature, preventing overheating. Heater hoses are used to transfer heated coolant into the vehicle’s heating unit or heater core.

What happens if there is no hot air coming from the heater?

If there is no hot air coming from the heater it is usually do to no hot coolant circulating in the engine. So if you have no hot heater air AND you have an overheating engine…this could mean you have no coolant in the engine, or not enough coolant.

What does the thermostat on a radiator do?

The thermostat has a special function within the circuit, it’s job is to restrict coolant flow back to the radiator when coolant temperature is below 180 deg F (83 deg C). Above this temperature a wax filled cylinder within the stat melts and expands causing the valve to open proportionally until fully open at about 199 deg F (93 deg C).

How does a thermostat work on a car heater?

A thermostat prevents the coolant from flowing until the motor gets warm enough. Rubber hoses carry the coolant from the motor to the radiator, and also to the heater core, which is basically a smaller radiator under the dashboard.

Why is my lower radiator hose Cold instead of hot?

If you have a problem with your coolant temperature and realize that the lower radiator hose is cold instead of hot, you could be experiencing problems with the coolant system that needs to get fixed. You will need to look at the various parts that influence the radiator temperature to properly diagnose a lower radiator hose cold problem.

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.

What happens when a radiator hose is not replaced?

Radiator hoses circulate coolant from the radiator to parts of the engine that need to stay cool. Over time, radiator hoses can weaken. If they are not replaced when necessary, they can completely collapse, causing the engine to overheat and unable to run. In extreme cases, a collapsed hose can cause the engine to burst.

What are the different types of radiator hoses?

There are 3 different types of radiator hose connections, gear clamps, banded clamps and wire clamps. Gear clamps, which are sometimes called worm clamps, and banded clamps, which are also called screw clamps, are typically made of stainless steel and wrap around the hose. You adjust these types of clamps with a screwdriver.

What does a radiator hose do?

A radiator hose is a one that transfers coolant from an engine’s water pump to its radiator.

Where is the radiator hose?

There are two hoses that connect to the radiator. The upper hose attaches from the top of the radiator to the top of the engine. The lower hose attaches to the bottom of the radiator to the water pump of the engine.

What is a thermostat housing?

The thermostat housing (along with similar coolant ports) serves as an access point between the engine and other parts of the cooling system. It contains the thermostat, which helps regulate an engine’s temperature by controlling the flow of coolant to and from the engine.

Why is the lower radiator coolant not reaching the heater?

You might know that if the thermostat is not able to provide a signal to the car that the engine is hot, the coolant will not drive to the heater and the air will remain cool. As a result, the coolant will not reach the lower radiator and will produce cool air only.

Is the lower radiator hose hot or cold?

The upper radiator hose is extremely hot, the lower radiator hose is cold. The thermostat has been replaced 3 times now. They have all been put in boiling water, and they all opened. The car has been parked on an inclined and filled with coolant, been jacked up and filled, we’ve used the cap to vent, we’ve used the bleeder to vent.

When is the top of the radiator supposed to be hot?

Either-way, the top hose gets hot after the thermostat has opened. The time the thermostat takes to open depends upon factors such as: In this post you’ll learn how the coolant system works, when the top hose should get hot and what you should do if it doesn’t. The coolant system after the oil system is the next most critical system.

How can I get the thermostat out of my car?

The thick black hose runs from the side of your radiator and attaches to the top or side of your engine block with a tube clamp. Use a screwdriver to loosen the nut on the tube clamp and then pull the hose off of the engine. Set the end of the hose aside for now so you can access the thermostat housing on your engine.

How to get the top radiator hose to be hot?