Had a similiar problem look good at the water pump there is alittle hole on it called a weep hole when the pump goes bad the cooland leaks out of it if thats where it is coming from you'll need a new water pump. you can see this hole from underneath slide under and look up whi8le its running with a flashlight. happens all the time. bet thats what it is goodluck
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It sounds like your thermostat is stuck closed. Your thermostat also acts as a heater valve to let hot coolant go to your heater core to blow hot air if your thermstat is stuck close it prevents your coolant to run through your radiator to cool down and to blow hot air from your heater core. A way to check to see if your thermostat is working while its at operating temp feel the bottom and top radiator hose if your lower hose is cold and top is hot your thermo is stuck closed but be careful hoses might be very hot
This is how I like to do it. Make sure the car is parked with the front end at an upward angle. Drain the coolant from the petcock at the bottom of the radiator. Remove the upper and lower hoses at the radiator. Remove the thermostat housing, and the heater core hoses at the fire wall. Flush out the radiator by pouring fresh water into the overflow, and the hole where the thermostat was. Flush the heater core as best you can by pouring fresh water into the heater core hose connections. Let all the water drain out, then button everything back up and replace the thermostat with a new one. Refill the rad and engine by filling the coolant reservoir with a mix of 50% water and 50% antifreeze, or buy the premixed stuff from the auto parts store. (Buy 4 jugs of premix or 2 of straight antifreeze) Run the engine until it reaches operating temperature and the upper rad hose gets hot. Rev the engine a little to help get the air out of the cooling system. When the thermostat opens, the coolant level will drop in the reservoir, so top it up and replace the cap. Check for leaks, and check the coolant level for the next few days, and check for leaks. Dispose of the old coolant responsibly
Your auto is definitely loosing coolant and will overheat. Check your thermostat, hoses, belts, radiator cap and water pump. If you do not fix the leak or coolant circulation problem you can destroy your engine. The smell inside can be being picked up from the outside vent or it could be your heater core inside the ventillation area leaking (which could be your coolant leak).. If that is the case you will need to replace the heater core.
I believe the heater hoses are on the pass side on your truck, but have you checked where the heater hoses go into the truck? Otherwise on the driver side I would check 2 things after I checked the hoses 1. Intake manifold check it up and down they are bad for leaking at one of the corners. and it could be running down the back onto the ground. 2. check the freeze plugs. if you can go to autozone see if they will loan you a coolant press test kit other wise they are about 30$ for one .With the car off top the coolant off and press the system to what the rad cap is rated 15 or 16 ect. get your flash light and chase the drip. I would say the intake is your first shot at finding it. if you have a uv light you can also add dye to the system let it run and find it. First get some thing to stand on get on over the intake and find the coolant just remember it can leak from here and run and drop there. hoses , intake , freeze plugs
Instead of removing the intake manifold and the the leaky manifold coolant hose, we simple place a 1" dia hose about 3" long with a **** down it so it can fit around the leaky coolant hose with two hose clamps and an agressive amount of "right stuff" silicone sealant and let stand for 24hrs which should fix the problem
Generaly 2 possabilities, low coolant level or cloged heater core/hoses. Check low coolant first as this is thew easiest and usually the simplest solution. With the engine cold, remove the rad cap and overflow cap. Fill the rad full and the overflow to the cold level and replace the rad cap and overflow cap. Start and warm up the engine. If you still do not have any heat, then let the engine cool and drain the rad. Remove the heater lines and try to bolw air through them (if cloged, then replace them). If the heater lines are clear, then blow air through the heater core intake and see if you get a good flow out from the heater core, if no, replace heater core.