Antifreeze leak at lower raditor housing? antifreeze dripping down oilpan by dipstick tube and aircondition compressor only when hot.

Sounds plausible that if the dipstick housing is broken, has a crack or hole that fluid could come out and drip on the exhaust manifold causing smoke. This works similarly to an oil dipstick, if you check the fluid cold and notice where the oil is on the dipstick then start the vehicle and shut if off and check the fluid again the oil will be higher on the dipstick (pressure).

I hope this helps!

have a cooling system pressure test done to see if there is a leak

If anti-freeze is actually coming out of the drain tube then yes, you could very well have a bad heater core. You may also be able to smell antifreeze while inside the vehicle if it is leaking. [Its a kind of sickly sweet smell] If just clear water is dripping out then this is most likely from normal condensation that is collecting and dripping off of the air conditioning evaporator core as the air conditioner runs. This condensation collects in the heater, a/c housing then drips out of the same little drain. Water from normal condensation will evaporate off of cement or pavement pretty quickly but antifreeze takes quite a while to evaporate away and feels slimy to the touch. It doesn't take much of an antifreeze leak before the cooling system gets low on so make sure you don't run low on coolant which can cause the engine to overheat.

I would ask for a clarification request, but lets see if I can help you. Dependent on where the transmission is leaking would help greatly, but a few minor things to look at are such things like your transmission dipstick. Yes, the transmission dipstick, when removed, you'll notice a small "vent" hole in it, where it goes into the tube of the transmission dipstick. This is to allow the transmission to "vent", for if it weren't allow to vent internal pressures, then the front seal could start leaking as well as the rear seal of the transmission. If you're experiencing a leak around the transmission's pan's gasket, then a DIY (Do It Yourself), Transmission Service is in order. To know how to perform this task, I recommend a Haynes Manual (located at any Auto Parts Store), for your particular vehicle.

Should the drip or leak be at the front seal, which you will see evidence of the drip around the bell-housing or the part that bolts to the Engine, then the transmission would have to be removed to have the front seal replaced...However, BG® sells automotive products and they do sell a "Transmission Conditioner" that will lubricate dry seals or expand them to stop the leak. The old shade tree way (which I wouldn't recommend), is adding Brake Fluid to the transmission which causes the seals to swell and "perhaps", stop the drip.

Once again, should it need to be taken out to repair the front or rear seal(s), remember to clean the Vent Hole on the transmission dipstick or the problem will occur again.

Hope this helps,

~00 Buck~

"Still living on the Right Side of Dirt..."

check and record all fluid levels ,then figure out which one is really going down(it is hard to diagnose a leak if you don't have a lift to see underneath)

It is normal for all cars that have an air conditioner. It is the condensation of the water in the passenger compartment air.

Like a house window air conditioner, the water collects on a pan and drips out a tube.

Likely you are overtightening the housing. If you have paper gasket type, try using a double gasket. If "o" ring type, just use the gasket. When tightening the housing take up small amounts on both sides, alternating from one to the other. Tighten till it is firmly mounted but stop there. After filling system, check for leakage. if seepage is noted, take up on bolts one quarter turn or less till drip stops.always alternating from side to side. Unless you have the wrong thermostat in there this pretty much has to work.

a bolt most likely vibrated loose and is letting transmission fluid leak out. try finding it and tighten it back up. or your dipstick housing is loose and the pressure is allowing fluid to leak out.

your heater core is bad. It will not leak very much anti_freeze but it will get worse. And can try a raditor stop leak but i would change it.