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if you have a blown head gasket in the engine this could cause the pressure to increase on the cooling system., A radiator specialist can put a radiator cap on the radiator that has a pressure guage attached to it to test this . A compression test on the engine would also rule out or confirm a head gasket or warped or cracked engine head. Coolant may be getting into cylinder 3 via a blown head gasket and cause a mis fire or ignition failure in the cyclinder of the engine. You may see steam coming out exhaust pipe also !
If your having to put that much water in it I would lean towards a bad head gasket your other symptoms would make me think possible water pump. I'd check them both 1 of the 2 is most likely the prob or possiobly both. Good luck.
Check Fans, turn on a/c and see if the fan or fans come on while vehicle is running. If they come on then that is not your problem. Check temperature with infrared thermometer at thermostat housing and at lower radiator hose. If both readings are near the same temp possible Thermostat problem. Do a block test or compression test to make sure a blown head gasket does not exist or cracked cylinder head or engine block. The the hoses have pressure squeeze them should be firm at operating temperature. Is your coolant full. Does it boil back out of the reservoir if so possible thermostat or head gasket problem. If the coolant was changed recently system may need bled. May have partially plugged Radiator. Flush maybe.
It could be due to age. Split hoses aren't uncommon.
However, it could be due to either a radiator blockage or a cylinder head problem - which is allowing exhaust gases to find their way into the cooling system via a leaking head gasket. When this happens the cooling system becomes pressurised by the exhaust gases.
To check if your radiator is blocked, run the engine until it is hot. The coolant goes into the radiator via the top hose and into the engine through the bottom hose.
Carefully feel the top and bottom hose. If the bottom hose feels much cooler than the top hose, then that indicates a radiator blockage. If the bottom hose feels 'flat' and 'squashed' that is another indicator - though it also can point to head gasket problems.
To check if there are head gasket problems, first check the oil on the dipstick. If it is a 'creamy sludge' then that indicates coolant has found its way into the lubricating system via a leaking head gasket.
Also remove the cap from the raditor expansion tank (where you fill it with coolant/water). Is there any sign of oil/sludge in the expansion tank? Another sign of head gasket problems.
With a COLD engine, remove the cap from the radiator expansion tank and then fire the engine up. Watch the coolant as the engine ticks over ... at first bubbles will appear as air in the coolant escapes. The bubbles should stop after a few moments as the engine warms. If the bubbles continue -or there is 'violent bubbling' that's teling you there is a head gasket problem.
I presume that your car hasn't been overheating or 'running rough' at times, as you haven't mentioned that. Overheating and 'running rough' can also be symptoms of head gasket problems.
All being well .. no radiator blockage or apparent head gasket problems, it is more than likely that the hose burst due to age/mileage.
Overheating can be the result of several things including: No coolant, stuck thermostat, cracked head, blown head gasket, bad water pump, cracked radiator side tanks, and poin holes in one or more hoses.
Start with the easiest things first. Check coolant level, if it's low you need to find out why. If it's at a normal level you know the coolant is not circulating through the motor. To test this run the car to temperature then feel the upper radiator hose, it should be hot and firm to the touch. Next feel the lower radiator hose it to should be hot and firm to the touch. If it's not the coolant isn't flowing through the motor which is the result of a stuck thermostat.
If the thermostat checks out ok crawl under the car and check all the connections between hoses/motor/radiator. Look at the side tanks of the radiator. If there's a carack in one they will only leak while the system is under pressure. Next check to make sure the water pump is circulating the coolant and not leaking. A siezed water pump will usually stop the pulley from turning resulting in a broken belt.
NExt look around the area of the head gaskets for signs of leakage, again this will only leak while the system is under pressure. Check the oil, if it looks milky there's coolant in it which is a sure sign of a gasket failure or cracked head. Good luck.