How do I make sure coolant is flowing?
One way to check for proper coolant circulation is to check the upper and lower radiator hoses. The upper radiator hose should be hot, around 190–200 °F. (The safest and most accurate way to get this temperature reading is with an infrared thermometer.)
Why is coolant not getting sucked back into the radiator?
I had the problem of coolant not being sucked back into the radiator on a 1993 Oldsmobile 88 that I once owned. The problem was the hose between the radiator and the reservoir. The hose would allow the coolant from the radiator to flow into the reservoir, but would collapse when the radiator would try to suck it back in as the car cooled.
Why does coolant disappear from the engine reservoir?
Call it antifreeze, a coolant, or even radiator fluid; the purpose is to maintain the engine’s cool. There may be times when the coolant system may fail due to one reason or another. The mystery arises though when magically the coolant disappearing from reservoir is noticed with no potential signs of leakage. Has this happened with your car too?
What does it mean if your car is losing coolant but no leak?
However, you may breathe easy if the mechanic does not find any trace of exhaust gases in the coolant. It means that the liquid has not reached the engine yet. The radiator cap can deteriorate over time, letting antifreeze slip through when you are driving. A clogged radiator system could be a problem too as it blocks the flow of the liquid.
Why does coolant come out of the overflow tube?
While this may seem to be a minor issue, it can lead to dire consequences. In normal circumstances, the coolant gets ousted out from the reservoir overflow tube, the moment the engine starts warming up. This leakage is visible and may result from bad reservoir cap. Go through maintenance tips for consequences of the overfilled coolant reservoir.