In the morning... when you first start it open the hood FIRST. Remove the radiator cap and then start the engine. If water gushes out of the radiator cap hole the head gasket is leaking into the water jacket of the engine. The only fix for this is to have the head gasket replaced. Also an indicator of water exiting the exhaust system is that the tail pipe will have more than normal / usual water exit the tail pipe and possibly appear quite clean at the outlet of the tail pipe.. i.e not condensation water that often appears during the first start of the day.
A compression test of the engine (all cylinders) would most likely reveal what cylinder is losing compression due to a head gasket problem.
Additionally.... if you remove the spark plugs one at a time.. the spark plug of the cylinder that is leaking will be cleaner than the rest of them.
Just note that if you find that there is a lot of water exiting the radiator cap hole just after first start of a COLD engine that the situation will only get worse and continued operation of the engine without repairs can be very costly.
Thanks for using FixYa.
Kelly
You may have a small pin hole in one of your hoses that is only leaking under pressure. Of course you may not notce it with the vehicle idling because the pressure is higher as the rpms rise while you are driving.
More importantly though, you need to check your oil dipstick. If the oil looks "milky" you may have water leaking into your oil. This can happen if you have a problem with your "heads" such as a small crack. A cracked head can lead to a blown motor so check it out as you are checking all of your hoses on your cooling systems.
Good Luck!
The overheating of the car can be due to many
reasons and you need to check on each one to confirm the working of the system.
1. In the first place the working of the engine must be assessed. it must be
smooth with a good indication that the tuning timing and the power seems good.
This will confirm that the settings of the engine is good and so there is less
scope that the engine seems to heat up on its own.
2. Secondly the radiator pressure cap must be tight and good, the radiator MUST
not loose coolant after a run or in a few days time- since this must be a
sealed system and there is no scope of water overflow or loss unless there is a
leak- sometimes the leak is too microscopic as under high pressure only steam
might escape and so reduce the coolant. So check for leaks while the engine is
hot , specially the radiator, the hose
or the fittings.
3. The working of the water pump must be good to ensure a good flow and
circulation, so check for leak in the water pump, check for presence of water
in the exhaust or leaking on the engine gaskets.
4.Make sure that the coolant is good and clean if not drain and refill , if
there is presence of rust please have a good flushing of the radiator or else
the chances are that the radiator ports can be blocked and reduce the
efficiency of the cooling .
5. Finally the cooling fan, the radiator fan must be working, check the
thermostat/thermistor to work accordingly with good flow, have a good water jet
wash on the radiator for a clean radiator cooling fin exposure.
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