Coolant leaking from under throttle body. Is this a head gasket? Where are all the coolant hoses leading to?

Hello, there is a coolant transfer pipe under the intake manifold, it connects to the front of the block under the manifold and exits at the rear between the heads where two hoses are attached for the heater and one for the throttle body, one of these may be leaking, in some cases the transfer pipe is rusted and starts to leak filling up the chamber between the heads until it leaks out at the back.

The throttle body is heated, replace the hose that supplies it hot coolant

Look for vacuum leaks anywhere between the throttle plate/s and cylinder heads. Throttle body gasket or intake manifold gaskets could be bad. A vacuum hose could be bad. Also, try pinching the hose to the brake booster and seeing if the idle returns to normal. You can use aerosol carb cleaner to help find the leak. Spray a little around and listen for the engine speed to increase. When it does, you've found your leak.

You may also have a bad throttle position sensor and/or a bad coolant temperature sensor. Find a buddy with a scan tool and have them tell you what codes are stored. That should get you pointed in the right direction.

FIRST YOU HAVE TO DRAIN COOLANT LEVEL BELOW THERMOSTAT THEN.TO REMOVE THERMOSTAT YOU HAVE TO REMOVE AIR FILTER DUCT AND MAF SENSOR TOGETHER.HAVE TO DISCONNECT ACCELERATOR CABLE AND TRANSMISSION SHIFT CABLE FROM THROTTLE BODY BRACKET. YOU HAVE TO REMOVE THROTTLE BODY UNIT REMOVE THE SMALL COOLANT HOSES FROM THROTTLE BODY,YOU NEED TO GO TO DEALERSHIP TO BUY THE SMALL COOLANT HOSES ATTACHED TO THE THROTTLE BODY.WHEN YOU REMOVE THE THROTLLE BODY UNIT.THEN YOU CAN REMOVE THERMOSTAT HOUSING TO REPLACE THERMOSTAT.YOU NEED TO BUY NEW THROTTLE BODY GASKET DONT REUSE OLD ONE.IF DO YOU WILL GET A VACUUM LEAK AND HAVE HIGH IDLE PROBLEM.

This most certainly sounds like a water pump issue. The thermostate is located inside the water pump housing and if the pump is bad you'l lose fluids and need to add every day or so. The temp guage will run hot and often the heater won't warm up. You have even notice fluids on the ground below the front passenger side of the car. Try getting a pressure test first before replacing anything. That's a good place to start the diagnosis.

do you have a 3.1 or a 3.4 liter V-6?

If so my first guess is that the lower intake gaskets are leaking. These are very common to fail on these motors. If you look under the thermostat housing ad see a pool of red coolant, Or you see the trail of coolant if you look down back behind the throttle body than that will usually confirm the problem.

You can also have leaking throttle body heater hoses, Or the hoses to the heater core may be leaking as well.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Uh oh...You may have the Ventures infamous head gasket/intake manifold gasket failure. First check your coolant level,not just in the bottle but in the radiator itself. Change your radiator cap. Make sure the rubber hose leading from the overflow tank to the radiator neck is not kinked and allows water to flow in both directions, not just into the bottle under pressure. Dex-Cool is very sensitive to exposure to air and tends to clog the system if air is allowed in. If you are low in coolant, flush out the system and from my experience I would change over to good old green coolant and change it every 30-40K. If your coolant level isn't low you may have a stuck thermostat (located sideways under the throttle body) or head gasket problem. A cheap check for a head gasket leak thats still small is to open up the radiator on the engine while its cold and start it up. A bad head gasket will send exhaust into the water jacket which will force the water to bubble up the radiator neck before the engine is even warm. A bad intake manifold will burn antifreeze out your exhaust and drain your radiator without any sign of a leak.

FIRST OF ALL YOU HAVE TO DRAIN SOME COOLANT.JUST ENOUGH SO COOLANT WONT FLOW ALL OVER ENGINE.AND COOLANT TO EXPENSIVE ON THE GROUND.TO GET TO THERMOSTAT.YOU HAVE TO DISCONNECT CONNECTORS TO MAF EGR IDLE SPEED CONTROL AND IAT SENSOR.. REMOVE THROTTLE AND SHIFT CABLES FROM BRACKET.REMOVE AIR FILTER ASSEMBLY WITH MASS AIR FLOW SENSOR.REMOVE BOTTOM PORTION OF AIR FILTER HOUSING.REMOVE COOLANT HOSES FROM THROTTLE BODY.THEN REMOVE THROTTLE BODY ASSEMBLY.YOU HAVE TO DISCONNECT SMALL COOLANT HOSE TOP WATER PUMP.REMOVE SMALL BOLT THAT HOLDS METAL COOLANT LINE TO WATER PUMP.THIS LINE HAS TO BE MOVE JUST ENOUGH SO YOU CAN REMOVE THROTTLE BODY.ONCE THROTTLE BODY OUT THE WAY YOU CAN REMOVE THERMOSTAT.BESURE WHEN YOU PUT EVERYTHING BACK TOGETHER.REPLACE THROTTLE GASKET AND THE COOLANT HOSES COME OFF THROTTLE BODY BESURE TO USE OLD COOLANT HOSES MEASUREMENTS FOR NEW HOSES MEASUREMENTS MAKE SURE YOU BUY THE CURVE HOSE FOR THROTTLE BODY. DONT TRY TO USE STRAIGHT HOSE IT WILL KINK AND CAUSE NO COOLANT FLOW.WHEN YOU ARE DONE.FILL COOLANT BACK TO CORRECT LEVEL AND BLEED COOLANT SYSTEM.

if its leaking next to throttle body shift cable side where intake is. its the intake gasket leaking.if its leaking under the throttle body.check top radiator hose.it could be leaking also.

actually it is not good idea to replace your coolant by water only you shoul full your coolant system 50/50 mixture coolant and water because coolant has uniqe smell and color so easier to identified leaks.
first check your oil condition and coolant reservior for any coolont oil mixture for figure out head gaskets condition if you have any oil coolant mixture in oil or coolant you have a blown head gaskets this will send you to mechanic if everthing looks clear then go front driver side bottom of radiator and open the drain **** (make sure car is cool and put container under because coolant is toxic and mess up your drive way )open reservior tab too and drain all the water close back drain **** probably your vehicle prefer dexcool(red color)
fill 3 qt dexcool then water or just buy ready mix run the engine with reservior tab open and check coolont level add more if necesery suquize collont hoses for air inside when engine start hit up close reservior tab. on passanger side front of the engine has a coolant drain plug open with number 8 wrench untill you see the coolant come out( bleed the system for air) make this several times turn on your heat too and bleed again and watch your upper and lover hoses for any visible leaks fallow small coolant lines like under throttle body check thermostat housing under throttle body on 3.4l engines check under radiator if your pressure cab dosen't look good get a new pressure cab .shut of the car and check for leaks once you find out where is leak from easy to fix it.