To understand what a car radiator does, it might help to understand the nature of the engine it protects. A car's engine has numerous moving parts, and where there is movement there is friction. Friction creates heat. Motor oil is pumped throughout the to provide some lubrication, but it isn't enough to overcome all of this excess heat energy. As a result, parts of the engine become boiling hot as part of normal operations. This is where the radiator system comes into play. The engine block must be kept relatively cool to avoid serious problems like overheating and seizure. If the pistons cannot slide freely in their cylinders due to excessive friction, they will eventually snap and cause total engine failure. To prevent this from happening, a mixture of water and anti-freeze is pumped through chambers in the engine block to absorb the excess heat and draw it away from vital areas. My car is a Chevrolet Lumina 2001. About 2 months ago I changed the radiator of my car because it was leaking, the guy that changed the radiator got the radiator in a junk yard place for cheap price. My car was overheating, and the mechanic explained the radiator, and radiator hose was bad. I have decided to look up some of the basics on maintaining a vehicle.As far as 'superheated' goes, i decided to take the info as it is, instead of criticize.People, find something to do. When this superheated engine coolant exits the engine block, it returns through a large rubber. This component is designed to maximize surface area through a significant number of internal folds and chambers. As the hot engine coolant moves through these nooks and crannies, excess heat is drawn out through the walls. An electrical or belt-driven fan may force cooler outside air through the radiator to accelerate this cooling process. As the car moves, the front of the radiator is also cooled by the outside air coming through the car's grill. By the time the superheated engine coolant has made its way through all of the chambers, it should be cool enough to make a return trip through the engine block. Free download games for android lg optimus l5 e460 printer. However, if the coolant flow should be reduced by a blockage or loss of fluid, the engine block will not be cooled down and the remaining engine coolant will boil over. This is why maintaining a full coolant level is so important, especially during hot weather or long drives. A radiator does not contain any electronic parts of its own -- special sensors register the temperature of the coolant as it exits. Engine coolant does not have to be especially cool in order to be effective, so there is usually a wide range of temperatures considered to be within normal parameters. If anything goes wrong with the radiator itself, such as a leak or broken hose, the operating temperature of the car can reach a dangerous level within minutes. The engine must be allowed to cool down naturally before the vehicle can be driven safely to a mechanic. I have a 2006 Dodge Grand Caravan. During cold weather, sometimes smokes or steam (can't tell which) comes out in small bits from either the front of the car or the front left side (right in front of the windshield) and there's a distinct sweet smell. I had it in for an oil change and they checked the fluid levels and said everything was fine. Retrieved 2017-07-07. Ps3 remote play pc app. Retrieved 19 March 2015. The engine temp rises only very slightly from normal operating temperature when the smoke appears and if I turn on my heat full blast the smoke/steam goes away. @Kansas 07: You have probably figured this out by now, but here goes anyway. You say 'both radiator hoses were sucked tight like all the air was sucked out of them'. We have been having problems with overheating recently on our Rover 75 (at the moment it is intermittent) and I spoke to one of the garages that deal with Rovers and they explained that if the rad pipes are old they will need replacing as over time they lose rigidity. If they don't have rigidity then the coolant cannot flow through them (i.e. They are sucked closed) and then the engine overheats. So if you replace the pipes that may solve your problem? I have a 99 isuzu trooper and we are having overheating problems. I am not bragging but we are pretty good mechanics, we know what to do for the most part. We changed the thermostat the water pump and the clutch fan. We did it one at a time and after every replacement we get closer and closer. Before we would only drive a quarter mile before overheating. We have took infrared heat temperatures throughout the motor and heads and all. All temperatures are close or right on. We checked down in the pistons and oil, no moisture, no signs of head gasket leaks. Icelandic knitting association. It can idle all day with out overheating. We can drive forever but every half mile. I have a used 98 Chevy Malibu LS. For a while the low coolant light was on but i didn't know what it was. I thought it was oil so i checked and it wasn't it. I drove the car from Richmond, Va to Norfolk, VA and everything without knowing it was low on coolant. A couple days later the car had steam coming from the antifreeze tank. I stopped pulled up the hood and checked everything. Saw there was only water in the coolant tank and put in some antifreeze. It's like five days later and it's still doing the steam thing and sounds like it's boiling under the hood when I drive. Is it the radiator? ![]() What makes a car radiator boil over? I have replaced the radiator, radiator cap, upper radiator hose, lower radiator hose, thermostat, thermostat housing, water pump, hose clamps, belts, water and gaskets. ![]() The radiator still boils over and escapes out the overflow tube and completely and totally purges. Antifreeze seems to be a complete and total waste of money. I've gone so far as to open the fan clutch and added new heavy viscosity oil! Nothing works! What have I missed? Regards, Tony Tampa Bay, Florida. I have a 1990 Chevy P/U 4.3 Liter V6. What To Do About A Crack Radiator In CarCooling system has not leaks, internal or external. Engine runs hot, but not to the point of boiling over. Replaced thermostat twice, replaced upper and lower hoses (both in rough shape) and replaced the water pump. Also flushed radiator with GUNK radiator cleaner. Still no success. Checked engine temp gauge and replaced engine temp sensor. The top hose on the radiator is not hot at all, and that side of the radiator is cold. The side with the lower hose is hot. Think it's a clogged radiator that needs replacement? The coolant inside a radiator can become boiling hot after the engine runs for a relatively short time. The cap on a hot radiator is under a lot of pressure and is holding back a lot of steam and hot fluids. The radiator won't 'explode' if you remove that cap, but it will spew steam and hot fluid everywhere. Never remove a radiator cap until the radiator has had a chance to cool down. For the poster with the Windstar, I'm wondering if you have enough coolant and water in the radiator itself to prevent evaporation. The radiator system will draw additional coolant from the reservoir as needed, but if you're already running low, it will take every last drop and still require more. When the engine is completely cool, open the radiator cap, not the reservoir tank, and check the coolant level.
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