if it only leaks during starting then thats really strange. but if you have a leak some where, then when you turn engine over it will turn water pump that will pressurize engine. if it leaks while running the engine then be careful and try to find source of the leak, it is most likely a bad seal, having bad seals is really really bad, it could leak into oil, not good for lubrication, find the source of your leak, or if its small enough leak, then put some stop leak threw it i wouldnt trust it farther than you can throw it, but if it works then i would suggest replacing all of your coolant to be on the safe side
A bad head gasket , a warped head usually from overheating , would allow engine coolant into an engine cylinder
Yes, it controls the coolant flow around the engine block, without coolant the engine would overheat.
Coolant added to engine oil? It would run but it would do serious damage to internal parts of the engine and drastically shorten the life span of the engine. Don't run it! Have the oil and filter changed NOW.
No, if the coolant circulates too quickly it will not have time to cool down and re-cool the engine. The coolant would become extremely hot, and cause your engine to overheat and thus causing possible engine damage.
Low coolant would be because the coolant is low or the sensor has failed, Check engine light would be because the computer has detected a problem and set a code.
Probably coolant in the oil from a blown head gasket which might also cause excessive steam from the tailpipe and hard starting. The coolant also could get into the oil through a crack in the engine block.
That would be the thermostat.
water pump, oil, water, engine coolant....main cause would be engine coolant, just check to see if you have a leak.
The normal direction of circulation in the coolant system would push the coolant out the thermostat opening.
Does the engine continue to run on it's own after you gave it a squirt of starting fluid? If so, try replacing the ECT (engine coolant temperature) sensor. If the engine runs only on starting fluid but not on it's own I would suspect the fuel pump is bad.
how to changing engine coolant on a 1993 mercury grand marquis gs.
Coolant Temperature Sensor