Ford Focus Coolant leak on nearside,all hoses seem to be ok coolant running down gearbox but cant locate where from.

It sounds like you may have a slight heater core leak and when you turn on your air, it's simply "stirring up" the smell. I've never seen this issue ina Focus but i have in a '97 Bonneville. The heater core is located behind the dash and requires complete dash removal to locate. It's a rough job to tackle alone. A lot of shops can run a "leak test" where they run a pink dye through your A/C system and see if it leaks anywhere. You may simply have a dry-rotted hose or bad seal. But my bet is the heater core, as thats the only place antifreeze enters the interior of a vehicle. Try smelling up under the dash on the passenger side and see if the smell exists there. If so, it's a heater core leak. Hope this helped!

some 3.0 engines hive a head gasket leak on the rear head on the corner hear the water pump..

Yes this could be a hose, a heaterhose, fill the cooling system and run the engine so that preasure build then before it gets hot shut it down and look for mhoses and squeeze them and try to locate coolant coming out , a preasure tester would be a great tool to find this leak but by you squeezing the hoses you should find the leak or even when the engine runs it may push water out, or sometimes when filling the system you can find the leak. hope this is helpful.

There are only 2 ways water can appear that I know of.
(1) Naturally occurring from combustion while you warm up the engine. It lays in the exhaust until it evaporates with heat or makes its way out little bleed holes in the mufflers.
(2) Air conditioner condensation off the evaporator which is SUPPOSED to drop thru a drain hose to the street. The hose can get plugged and it could leak out higher up maybe.
Your air conditioner works even in cooler temps to dehumidify the windshield(in DEFROST or MIX modes). This resulting water is supposed to drain thru that hose off your heater plenum.
don-ohio

You may be developing a worn head gasket which can allow oil to flow into the engines cooling jacket. If your engine is running rough this is usually a good idication that there is a head gasket leak.

really this could be one of several issues, does the vehicle run Hot, are you having to fill the reservoir with water or coolant, there is a hose that runs from the cap (overflow hose) to the reservoir, in addition to the upper and lower hoses, finally the water pump. the water pump is equipped with weep holes, which allow fluid to weep out when the pump is bad. finally the thermostat, hopefully one of these can solve your issue, good luck!

No it sounds like your water pump bearing has worn causing the leak.Change the water pump.

is the car looping at idle...if so it could be your head gasket..had to change mine

Water pump. No question in my mind, water pump.

check the oil for water by pulling the dipstick if its muddy brown you have a bad headgasket, also check inside on the passenger side carpet for wetness, does the car run okay? check engine light on ? please rate and good luck -jeff