Radiators Caps Kaneohe HI

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Auto World Specialists
(808) 206-7240
140 Pu'uhale Rd
Honolulu, HI
Hours
Monday 8:00 AM - 5:00 PM
Tuesday 8:00 AM - 5:00 PM
Wednesday 8:00 AM - 5:00 PM
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday Closed
Sunday Closed
Memberships and Certifications
Certifications : ASE
Services
Air Conditioning/Heating, Alignment, 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 M
Service Types and Repair
Acura, Aston Martin, Audi, Auto Clutch, Auto Drivetrain, Auto Engine, Auto Interior, Auto, Bentley, BMW, 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

Midas Kailua
(808) 262-6544
174 Hamakua Drive
Kailua, HI
Hours
Monday - Saturday 7:00AM - 5:00PM, Sunday 8:00AM - 2:00PM

Carquest Auto Parts
(808) 832-2090
1322 N King St
Honolulu, HI
Services
Auto Parts

Airport Carquest
(808) 839-5220
2760 Waiwai Loop
Honolulu, HI
Services
Auto Parts

Kalihi Carquest
(808) 832-2090
1322 N King St
Honolulu, HI
Services
Auto Parts

Goodyear Waipio
(808) 664-5211
941201 Ka'uka blvd
Waipahu, HI
Hours
Monday 7:30 AM - 6:00 PM
Tuesday 7:30 AM - 6:00 PM
Wednesday 7:30 AM - 6:00 PM
Thursday 7:30 AM - 6:00 PM
Friday 7:30 AM - 6:00 PM
Saturday 8:00 AM - 6:00 PM
Sunday Closed
Memberships and Certifications
Certifications : ASE
Services
Air Conditioning/Heating, Alignment, 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 M
Service Types and Repair
Acura, Aston Martin, Audi, Auto Clutch, Auto Drivetrain, Auto Engine, Auto Interior, Auto, Bentley, BMW, 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

Napa Auto Parts
(808) 841-6272
1130 Sand Island Pkwy
Honolulu, HI
Services
Auto Parts, Car Washes, Car Detailing

Auto World Specialists
(808) 833-4464
3047 Koapaka St
Honolulu, HI
Services
Auto Parts,Oil Change and Lube,Towing Service,Alignment Repair,Auto Body Repair,Auto Repair,Brake Repair,Electrical Repair,Fabrication and Restoration,Retail Tire,Truck Detailing

Midas Honolulu
(808) 841-7361
1415 Dillingham Boulevard
Honolulu, HI
Hours
Monday - Saturday 7:00AM - 5:00PM

Carquest Auto Parts
(808) 841-8018
1425 Middle St
Honolulu, HI
Services
Auto Parts

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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