Radiators Caps Lewiston ID

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Joey's Auto Service
(208) 503-7278
3003 4th AVe
Lewiston, ID
Hours
Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
Services
Air Conditioning/Heating, Alternator, Battery, Belts & Hoses, Catalytic Converter, Clutch Cylinder, Cooling System, Diagnostics, Drive Belt, Electrical System, Exhaust Systems, Filters & Fluids, Fuel Injector, Fuel Pump, Fuel System, Head Gasket, Headlight/Headlamp, High Performance Service, Ignition, Inspection, Muffler, Oil Pan, Oil Pump, Oxygen Sensor, Parts, Radiator, Restoration Service, Shocks & Struts, Spark Plugs, Starter, Thermostat, Timing Belt, Tune-Up, Water Pump, Window Motor, Windo
Service Types and Repair
Acura, Aston Martin, Audi, Auto Clutch, Auto Drivetrain, Auto Engine, Auto Interior, Auto, Buick, Cadillac, Chevrolet, Chrysler, Classic Car, Diesel Engine, Dodge, Emergency Auto, Exotic Car, Fiat, Ford, GMC, Harley Davidson, Honda, Hyundai, Infiniti, Isuzu, Jaguar, Jeep, Kia, Land Rover, Lexus, Lincoln, Lotus, Mazda, Mercedes Benz, Mitsubishi, Motorcycle/ATV, Nissan, Oldsmobile, Pontiac, Porsche, RV/Bus, Saab, Saturn, Small Engine, Subaru, Suzuki, Toyota, Truck, Volkswagen, Volvo

Kenworth Sales Lewiston
(208) 746-7087
1643 Old Spiral Highway
Lewiston, ID
Services
Truck Parts

Lake City Trucks
(208) 743-9438
529 22nd Street North
Lewiston, ID
Services
Truck Parts

Shraders Truck and Auto Repair
(208) 746-6580
1485 Old Spiral Highway, # 4
Lewiston, ID
Services
Truck Parts

Rudolphs Auto Service
(208) 746-2304
502 B St
Lewiston, ID
Services
Auto Parts,Service Stations,Truck Repair

Western States Equipment CO
(208) 746-3301
16772 Hatwai Bypass
Lewiston, ID
Services
Truck Parts

AutoZone
(208) 743-2446
1121 21st Street
Lewiston, ID
 
Auto Paint and Parts
(208) 746-8640
1005 Main Street
Lewiston, ID
Services
Truck Auto Body,Truck Parts

Idaho Truck Sales CO Inc
(208) 743-2547
2934 North And South Highway
Lewiston, ID
Services
Truck Parts

Rotool
(509) 758-8590
1125 14th Street
Clarkston, WA
 

Radiators Caps Are Important Too

By Bill Siuru   

While radiator caps look simple and do not cost much, they are critical for a properly Operating cooling system. A faulty cap can result in overheating, loss of coolant or major engine damage, so it is important that it is checked periodically and replaced if necessary.

To prevent overheating and coolant loss, cooling systems are pressurized raising the coolant's boiling point about 3-degrees F for each additional psi above atmospheric pressure. The cooling system is pressurized as the engine warms up and the coolant expands. The radiator cap's pressure relief valve allows pressure to build up to a specified level, then lets excess pressure to escape. In an "open" systems found in older vehicles, excess pressure escapes to the atmosphere through an overflow tube. As the system cools, air enters through the overflow tube and coolant is lost. Therefore, "closed" or reservoir cooling systems are used in later model vehicles. Here, as the coolant expands it goes through the over- flow tube into a reservoir. The radiator cap now serves as a vacuum relief and siphon valve allowing coolant to be siphoned back into the radiator as the engine cools and the coolant contracts.

Radiator caps also serve as pressure relief valve to prevent excessive pressure in the cooling system after the engine is turned off. Unchecked high pressure could cause damage to the radiator, heater core, hoses or water pump seal. The pressure cap also prevents radiator hoses and tanks from collapsing due to the partial vacuum which would be created if air was unable to enter.

Check the radiator cap during routine maintenance, when coolant is tested or when coolant is replaced. Check only when the engine is cool. Then with the engine off, place a rag over the cap and remove it. Turn it counterclockwise about 1/4-turn until it reaches the safety stop. Allow all pressure to vent before removing the cap by pressing down and turning it counter-clockwise. On some vehicles, the radiator cap is located on the overflow reservoir.

Once the cap is removed, Pressure test the cap noting the maximum pressure when the cap valve opens. Caps come in a variety of pressure ranges: 4-pound caps (3-5 lbs.), 7- pound caps (6-8 lbs.), 13- or 14-pound caps (12-16 lbs.) and 15- or 16-pound caps (14-18 lbs.). The cap should be replaced if it fails to hold the rated pressure for one minute. Using a cap with the wrong pressure rating can cause over pressurization or...

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