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Absolutely not. If the radiator is hot it will explode antifreeze and give u severe burns. Now if you need to put water in it or antifreeze u can open up the overfill tank anytime. The overfill tank is a plastic tank on the side of the vehicle. Now some cars don't have overfill tanks. Take a Crown vic for example, their radiator IS a plastic chamber with a plastic cap which tells you, do not open when hot.
Overfill tanks are plastic tanks
Not all plastic tanks or overfill tanks.
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Why White smokecomes out tailpipe that smells like coolant?
You have a blown head gasket. Open your radiator while the engine is running. You should find exhaust coming from it.
Do you check the radiator liquid when the cars on?
NO! That would be dangerous. Cars' coolant systems are pressurized, so if you open the radiator cap while the engine is running, it will spray HOT radiator fluid (water mixed with ethylene glycol, usually) all over you, and sometimes drain the radiator of coolant.
Will running open headers while its cold out side hurt a engine?
No.
Oil sputter while engine is running and oil cap open?
Oil sputter is going to be a normal thing if the oil cap is not on while the engine is running. The engine should never be run with the oil cap open. The engine actually has less compression when the oil cap is open, and this could hurt the engine.
Should you put antifreeze in a car while it is running?
It is best to do it while your vehicle is running so it will circulate through the system. You should add it to the reserve tank, never open the cap on your radiator (if it has one) while the system is hot.
How do you open side doors with remote on 2000 Windstar SEL while engine is running?
The van must be in park
How do you add antifreeze to a car?
Open the radiator cap when the engine is cool, check the radiator's fluid level, and add appropriately. NEVER OPEN A RADIATOR CAP WHEN THE ENGINE IS HOT OR OVERHEATING. Check your car's owner's manual for specific details.
How do you refill the radiator to make sure the block has water in it?
Have the vehicle running when refilling the radiator, or top off radiator after engine warms up, and thermostat opens (temperature gauge will drop). Some engines have a cooling system bleeder you can crack open and fill the radiator until coolant comes out of the bleeder. The bleeder is generally located at the highest point of the cooling system on the engine.
How do you change coolant in 2002 Honda 1800 motorcycle?
search for the drain cup on the radiator, remove the lower radiator belt from the radiator and aim at a bucket to clean the antifreeze out of both the radiator and the engine. Crank engine over for a maximum of 5 seconds, remove sparkplugs so engine can't start. Once the engine and the radiator have stopped leaking coolant (may take 20-30 minutes), re-attach lower rad hose to both lower engine and radiator. Open vent cap on radiator look at the thermostat housing for a bleed valve, fill radiator, re-install spark plugs, crank engine over to force coolant from radiator to engine, leaving bleed valve open while you continue to fill the radiator until you have a steady stream with no air being released from the bleed valve, close bleed valve. Replace rad cap, allow engine to run 2-3 minutes, check temp gage for engine temp. Open rad cap, check level of coolant in rad. Top up fluid to just below the rad cap or the marked fill line on the radiator spout. If the engine is running warmer than normal, allow engine to continue to run, re-open bleed valve until vapour lock exits bleed valve and you again have a steady stream of coolant allowing engine to continue to run. Check temp gage to verify thermostat is operational and engine is at normal operating temp. If still running warmer than usual, redo the steps to remove any trapped air (vapour lock) until engine runs at normal operating temp. Fill engine coolant reservoir to maximum line and you should be fine
Is it better to open radiator with car on or off?
Off, with a cold engine.
What is an interference engine?
It refers to an engine where the area occupied by the valves when they are open is occupied by the piston when the valves are closed. If the timing belt lets go while the engine is running the piston will smash the open valves doing loads of damage.
What is special about changing the coolant in a 1995 Buick Regal -- why would a manual say not to open the radiator cap?
The assumption is, the engine is hot and if you open the radiator cap you will be sprayed with hot radiator coolant. If I'm not mistaken, didn't the 95 Buick use the "permanent" radiator coolant? If so, don't change it until the specified time. Just don't open it while it's hot. Do it when the car is cool.
