My cousin Says there is coolant leaking out of the top of his engine, right by the spark plug. The engine is a 4.6L.

I am wondering if you have a rad hose that is leaking. Check and see if the thermostat area is leaking where it comes out of the engine. I have seen this happen. Not sure but is the water pump leaking. Just ideas.

head gaskey leaking or bad water/coolant jacket in the head or poably warped head from over heating

look on top of motor do you see water behind thermostat housing? the base of the housing cracks and needs to be replaced 3 screws and 2 hoses it off good luck did two of them this week.

The cooling system shouldn't be losing much coolant.

If you're putting in coolant regularly
If you're seeing slick oil in the coolant
If you're hearing noise in the engine while driving

You may have a crack in your engine block and your engine isn't being lubricated properly anymore. This will cause noise and leaks, make a motor run really rough and cause rough starting.

I suggest you bring your vehicle in for a coolant system pressure test and a chassis leak check. This should be a free service from any auto shop that wants your money for repairs.

Spark plugs usually degrade your performance slowly and don't make noise while doing it unless in extreme cases.

Good luck!

If the Check Engine light is coming on the computer is storing a code to let you know what the problem is. Have your computer scanned and you will probably find out what the problem is. The temperature gauge cannot work properly if the cooling system is leaking. The sending unit has to be in the coolant to work. If the coolant is low, the sending unit will not be in the coolant. If the coolant is leaking from around the radiator there has to be a radiator, radiator cap, or radiator hose leak.

You probably have a bad head gasket, leaking coolant into the cylinder. Running it this way will destroy your engine.

It,s quite possibly the thermostat neck. Simple fix, keep the coolant level in check until you can get it to a mechanic on Monday.

Typical symptoms of a blown headgasket may include: -bubbles of air coming up into your radiator (remove cap before starting) -leaking radiator -milkshake colored oil -overheating -rough running -coolant or oil running from head -spark plug(s) that have a green tint (if green coolant). -white colored or sweet smelling exhaust, white smoke of your tail pipe, or loosing coolant through your overflow

the coolant should be right at the top of the radiator if you can see the bottom of the radiator that you have a stuck thermostat

If you had the engine replaced and have the same leak, it may be be somewhere else. You can rent a tool from most parts stores that pressurizes the cooling system. If you get that tool, top off the coolant and follow instructions to pressurize that system, you may be able to see where it's leaking. While it's under pressure, take a flashlight or shop light and look in all the main areas. (hose connections, radiator, water pump, ect)