If you see overheating in addition to that symptom, there may be exhaust gases from a leaking cylinder head gasket finding their way into the cooling system. Possibly a bad radiator cap, or unclamped radiator hose. If you find that a cold radiator shows air at the top of the radiator but the reserve tank has coolant in it, there may be a vacuum leak in the system. You should then see the reserve tank level drop somewhat after cooldown. So after coolant has been drained, you should replace it by filling both the cold radiator and the reserve tank completely full. But if there's too much air in the system, it's hard for the "push air out suck coolant in" routine to work. Even when opening the ventilation cap when filling before starting. A few cycles of that should get rid of all the air in the radiator. The bubbles you noticed were the result of air in your cooling system after maintainance. When the engine cools down, it should suck coolant from the reserve tank back into the radiator to replace the lost air. When the car warms up, any air in the cooling system expands, bubbles to the top of the radiator, is pushed into the coolant reserve tank, bubbles to the top there, and then flows out to atmosphere. Any ideas as I don't want to fork another 2kĬheers.When cold, the radiator should be full to the cap. Sits on 80deg towing the camper and will rise to 95deg on a big hill then come down again reading off the scan gauge. Could the mechanic missed something or the testing of the head been a stuff? Is the some other area that can pressurise this system that we have missed. Going to get pressure tested tomorrow, I've also tried two radiator caps. Just got back from a trip and it's over flowed the bottle and really annoying me now. The cooling system will need to be fixed if the combustion gas leaks into it during the test. Use a cylinder leakage tester and turn off the engine. Checking the vehicle’s cylinders is an easy way to confirm this. If you see bubbles in your overflow tank, it is either overheating or (more probably) it has a blown head gasket. I have been running to work(60km) round trip with no problem but even after two days sitting and you remove the radiator cap there's to much pressure there for my liking. Bubbles in your coolant and the overflow tank are typical, but they might potentially indicate a head gasket leak. System was bled and we found no air bubbles coming out of the radiator cap when running at operating temperature after air was bled. The machenic did not replace the heater hoses at the time of repair so I changed out the radiator, water pump, thermostat, fan clutch. Ran good for a few thousand k's the started all over again. The head was pressured tested and refitted with new gaskets with no trace of a problem in that area. It is normal to see bubbles and movement in the tank when the engine is in the process of getting to operating temp. We were convinced the head or head gasket was gone so off it came. After a 300 km trip it would fill the over flow and not return into the radiator. I had coolant coming through the heater core so we bypassed that. Then it started this popping noise(air) into the over flow bottle after shut down. I bought this vehicle in April and ran fine for two months. I have a 3.2 ML which is causing us quite a headache.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |