Get a flush kit at auto parts store. it might work, depending on how well or how old the coolant system is or has been maintained over the years. ALOT of times if the coolant flow is bad after trying to flush the rad may have to be cored and reworked(the top is made of plastic and traps rust and debris...). Price; $75-$125, probably more! It cost about the same and comes with a warranty. Dealer replacement price is crazy and their warranty isn't as good. If you have the car for any length of time you will eventually run into the same problem down the line. If that is the case where it cannot be flushed your money is better spent on a new rad, preferably an aftermarket that is all metal. That was just my experience with my 90' XR7 H.O.. You may have better luck. So, good luck!
The radiator on a 1999 Mercury Cougar is flushed by draining the radiator, filling it with water, and adding a commercially available radiator flush. The engine is allowed to circulate for 10 minutes, drained, flushed with fresh water, and refilled with coolant.
Buy a flush kit at auto parts store and follow instructions
Remove both upper and lower radiator hoses and run your garden hose water through from the top opening.
On a 2001 Mercury Cougar : The radiator is located in the engine compartment , at the front of the vehicle
SLIDE OFF THE LOWER RADIATOR HOSE AT THE RADIATOR...
To flush the radiator in a 1999 Mercury Cougar V6, first make sure the engine is cool. Put a bucket under the drain plug on the radiator, remove the cap and open the plug. Close the plug, fill the radiator with distilled water, then drain again. Repeat until the water comes out clean. Tighten the plug and fill the radiator with new coolant. Run the engine for about 10 minutes with the heater on high, then check the coolant level and add more as needed to complete the process.
The radiator fluid is low or you parked the car at am angle.
Remove radiator cap. Push Cougar out of the way. Push a better car under the radiator cap. Install radiator cap.
Flush the cooling system? Flush the fuel system? Flush the hydraulic brake system? Flush the AC system? Flush the transmission? Pick one.
On a 2002 Mercury Cougar : No , the thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
the radiator itself is either aluminum or copper only the tanks are plastic
No , the thread on cap on the engine coolant reservoir is the pressure cap / radiator cap