A few places to look: Check to make sure you have a good rubber seal on the underside of your radiator cap. Get a mirror and look at the backside of the engine block for wetness meaning a leaking intake manifold especially if you have a 4.3
Make sure it is full of coolant. There probably is a small leak causing the smell. Check it cold as sometimes it leaks cold but not hot.
NO, the problem needs to be properly repaired. its not like an oil or antifreeze leak. the basic principle of a brake system is the free movement of fluid through the brake lines. an additive to this system to "stop" a leak would ruin the whole system and be catastrophic to fix. brake leaks are generally an affordable fix.
Where is it leaking? That pressure test sounds funny, why would you pressurize only the pump and radiator? If you are leaking coolant outside the engine, locate the source. If you are losing it from the radiator but cannot find a puddle suspect a head gasket problem. Check the Radiator cap first, if it is bad high pressure coolant will travel back to the overflow bottle.
It might be a freeze plug open on the motor (a safety feature). Once the level gets low enough, it will stop leaking.ANS 2 - More likely is that it's leaking while the engine is running and hot. Check at the base of waterpump. Also any hoses to heater,etc. If you don't see any leaks and it still leaks it may be the head gasket. ( Let's hope not.)
If it leaks, use a aquarium sealer.
smell of antifreeze and no visable leaks usually indicates that the heater core needs replacing
Some people say that the smell of hot antifreeze smells like mold. It could be possible you are smelling the antifreeze from the engine.
Very likely.
heater core leaking
Same color as what?
Oil/antifreeze mix is usually caused by head gasket leaks or valve cover gasket leaks.
no
Find where it is running out and repair the cause.
Learn how to spell
Could be the intake manifold gaskets are leaking.
Yes. Antifreeze is actually pumped through the intake manifold. If the gasket is bad it is possible that it leaks out
Gasoline and factory odor and catterpillar leaks, my man! And sewage.