HOW TO FLUSH OUT THE COOLANT OUT OF A
2005 Chevrolet Malibu • 131,000 miles
Put the wrong coolant so im flushing it out. For a 4 cyli car
November 30, 2011.
November 30, 2011.
A lot of manufacturers were supplied with radiators that have thin plastic that cracks when the petcock is screwed back in. That causes a slow leak. Rather than worry whether that applies to a specific car, I prefer to never open that radiator drain. Pull the lower rubber hose off instead. I also remove one heater hose from the engine. Most GM cars use plastic tubes on the heater cores that are easily cracked and broken when trying to pull the hoses off. That's why it's safer to remove a hose at the engine. Run water from a garden hose into the hose going to the heater core and into the fitting or metal tube the hose came off of. Fill the overflow reservoir too and let it drain into the radiator or engine. If there's a bleeder screw on the engine, typically near where the upper radiator hose attaches, open that too. That will help the old coolant run out from above the thermostat.
Once the water is running clearly, allow as much as possible to drain out, then reconnect the hoses. There is always going to be some water trapped in the passages of the engine block so it isn't a good idea to mix the new antifreeze and water before pouring it in. It's going to be diluted by that water still in the engine. Pour straight antifreeze in first until there's enough to mix when you run the engine. Use an antifreeze hydrometer to check the freeze temperature to determine if you need to add more water or more antifreeze. A lot of GM cars have the "radiator" cap on the reservoir which makes it necessary to add to the reservoir instead of in the radiator. That makes fine tuning the mixture very difficult. Those reservoirs hold over a half gallon so if you just fill the system enough to allow driving without overheating, the water and antifreeze will mix over a period of a few warmup - cool down cycles. At that point you can accurately measure the freeze point and add to the reservoir.
Remember to watch the dash gauge or light for signs of overheating. That "new" problem will only occur if there's an air pocket by the thermostat. Thermostats don't open in response to hot air, only hot liquid. There will usually be a bleeder screw on or near the thermostat housing or there will be a sensor or threaded plug to unscrew to burp the air.
Nov 30, 2011.
Nov 30, 2011.
1986 Nissan Stanza, California version. The engine wants to die when stopping. I thought that the lock-up switch for the torque converter was not unlocking. I have installed a used ...
2 answers • 1986 Nissan Sunny • 100,000 miles
1999 Hyundai Elantra mileage: 110,000. This car idles fairly well in neutral or park but very rough in reverse and drive. I just replaced the engine with a used engine and it is doing ...
1 answer • 1999 Hyundai Elantra • 110,000 miles
1988 Chevrolet Astro Van mileage: 247,000. It's time to replace the engine in my 1988 Astro. I bought a 4.3 V6 that has come out of a 1991 S-10. When I dismantled it to get it ready to ...
1 answer • 1988 Chevrolet Astro • 247,000 miles
1990 Toyota Camry mileage: 150,000. 1. The oil warning light is on. 2. There are four quarts of oil in the car. 3. The oil filter is dry. 4. The engine sounds rough. 5. There is noise ...
2 answers • 1990 Toyota Camry • 150,000 miles