I bought Radiator Flush for my 95 Maxima?

After changing the Radiator Hoses, Thermostat, and Water pump i still overheat. when the car idles it is fine. The rattle i think is the timing chain off? The Mechanic shop said i had a cracked neck, but the radiator holds pressure. So i wasn%26#039;t trusting their assumption. top hose hot, lower hose not. Can%26#039;t even go around the block before heating up. Shop told me head gasket was fine. Should i flush the radiator with a hose? Use the Chemical Flush stuff? or should I start with the timing chain--maybe not operating the pump properly?|||If it heats up THAT fast, you likely have something more serious going on.


I have seen water pumps that the vanes break off. If you have that rattle noise, I would bet your water pump has internat parts broken and not moving the coolant.





Your timing chain should not drive your water pump and if the timing chain is loose or broke you will notice other problems prior to overheating so I cross that out as the culprit.





Take the drive belt off your water pump and try spinning it by hand, see if it makes noise or feels like it is turning rough. I bet it is the pump.|||I would flush the radiator first and see what happens, it%26#039;s possible that the radiator needs replaced or taken to a radiator shop and rodded out, doesn%26#039;t make sense that it doesn%26#039;t heat up just sitting idling, are you sure you temperature gauge is working properly? or the temperature sending unit isn%26#039;t bad?|||did you make sure you put the thermostat in the correct way?its easy to install them the wrong way ,or if your cetain its correct , did you bleed out the system when you replaced these things, when you operate on hoses and everything air could have gotten into the system causing %26quot;hot spots%26quot;there should be a bleeder screw on your thermostat houseing try opening it up to release the air untill you get antifreeze come out ,try replacing you radiator cap or have it pressure tested also check the fins on your radiator if there all pressed in it might not be disapaiting the heat properly causing it to over heat.also do you have the correct 50/50 antifreeze and water mixture, they either come prediluted or you mix antifreeze with distilled water if you use tap water you can clog up the small tubes in you radiator with calcuim build up ect.Any of these could do the trick.Just process of elimination.Normally its recommended to get your cooling system flushed every 2 years.