Water Reservoir Tank Boiling

That would indicate a blown headgasket.

Water reservoir tank boiling. When this happens the coolant is not allowed to circulate throughout the vehicle s engine as it should. Your local repair shop can perform test to identify cylinder head or engine block cracks. It has some other useful tools and info in it. When the coolant is released to the reservoir it may boil because of the fact that it is at atmospheric pressure and the water portion will boil at 212.

Do not remove a radiator cap from a hot engine to check. One of the most common causes is a blown head gasket in which the air pressure inside the cylinder heads is transferred to the cooling system. The engine cooling system is pressurized somewhere between 5 to 15 pounds per square inch. You can experience a shot of boiling water exploding under pressure.

I suspect that the boiling you were seeing in the reservoir wasn t boiling at all but was actually combustion gasses being blown into the water jacket and migrating out to the reservoir where they were coming out as bubbles. It could mean that air is somehow getting into an otherwise pressurized liquid system or it could mean that the the last time the coolant was changed some air was. It means there is air in your cooling system and this is always a bad thing. This escaped air causes bubbling in the coolant antifreeze reservoir which can often be mistaken for boiling.

The fact that the coolant was boiling out of the reservoir cap suggests that the thermostat may be stuck closed. Federal mogul radiator cap. The reason a bad cap can allow the water to boil is because the pressure the cap is designed to keep in the cooling system makes it more difficult for the water molecules to escape as a gas. In fact if you placed the coolant in a vacuum it would boil sooner.

Https invol co clo1ds in this video i ll show you how i was ableto fix the issue i had with the reservoir of my honda civic 1999.