There seems to be a slight leak at the front of the motor, and when the engine is shut off and the pressure builds in the system is when you can smell the leaking coolant, and ideas to what it may be and how I can fix this?
Most likely the over flow tank. They are bad about leaking.
To save money go rent a radiator pressure tester pump up the system to 12-15 lbs then take a light and search for a coolant leak check hose connections, water pump, radiator itself. if you are not comfortable looking for the leak call a buddy to help. you will also be able to locate the leak by looking all over the motor for a little yellow river that heads to the ground
SOURCE: 2002 freelander coolant leak
My coolant leaked out and on top there is a large hard plastic container, I had to replace it, that stopped my coolant leak.
SOURCE: 2001 BMW 318i se Coolant
check the cap on the coolant ,i had same prob. if the cap is loose the level of water will change.tighten the cap it can be somthing as simple as that.
SOURCE: 1996 vw vr6 engine coolant leak in front of engine
A blown head gasket doesn't necessarily mean there is water in the oil. Check for bubbles coming into the coolant tank. Take car for a short drive to build up coolant pressure and you should be able to see where it is leaking from a bit easier. It is possibly coming from a heater pipe or core plug.
SOURCE: 2002 Jeep Grand Cherokee fluid leak
That is the area the air conditioner vent drains. There aren't a lot of fluids possible - coolant, power steering fluid and transmission fluid are the only ones that would be in that position unless your windshield washer fluid leaks from the tubing. Brake fluid would be closer to the wheels. If the air conditioner runs at all it removes moisture from the passenger compartment and drains near the passenger side firewall. All the other fluids would hae a definite smell.
SOURCE: My 2001 Ford Windstar van seems to be using alot of coolant daily
Possible coolant leak on hot engine parts causing it to evaporate as it leaks. That would definitely invade the cabin air.
You would need to carefully check under the hood with the engine warmed up and running.
Also could be a headgasket failure between coolant channels and a combustion chamber. This latter problem sometimes shows itself as vapor at the tailpipe after there should be no more visible. You may also detect the odor of coolant there too.
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