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Don’t let your engine overheat! Make sure you change your engine coolant. Don’t worry if you don’t know how … we’ll show you this episode Wounded!

See us all Autoblog ranched Video for more tips on how to diagnose, fix and repair a car from professional dealer Larry Kosila. While you’re at it, watch a video series of Larry’s other car cleaning and maintenance Autoblog Details!

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Instructions (video transcript):

[00:00:00] – [Host] Corrosion protection within our engine’s cooling system every two years keeps your aluminum radiator, heater core, water pump and cylinder heads in excess of the engine’s heat by keeping them in contact with sludge-filled, rusty goop. Fortunately, this is a simple solution, and here are the tools you need to do it yourself: screwdrivers, catch cans, distilled water, engine coolant, gloves, safety goggles, basic equipment, rags and a funnel. I’m Larry Kosilla, Pro-Detailler

[00:00:30] And coach for the last 15 years, but when it comes to what’s under the hood, I’m a student. Follow me because experts teach me how to diagnose, fix and repair cars AutoblogOf Wounded. So how often should you change your coolant? – In most vehicles, you should change your coolant every 30,000 miles. Over time, the coolant can become acidic and this will eventually break down all the metallic components inside your engine. – [Larry] First, we need to let the engine cool down so that we don’t get burned or the antifreeze pressure from the radiator

[00:01:00] When open when hot. Remember, antifreeze is a toxic liquid, so take extreme care. While we were waiting for the car to cool down, Joe checked the owner’s manual to see how much coolant was needed for the system and what kind of coolant the manufacturer recommended. When the hose is cold to the touch, open the radiator cap while holding a rag in case the coolant comes out. Next, search for Petcock at the bottom of the radiator and move your catch can into place. If a petcock is not present, simply remove the attached minimal hose

[00:01:30] Radiator core, it will work too. Remember, if there is a slope at the bottom of the engine, you will probably need to remove it before you can access Petcock. Twist the knot and let the petcock drain for the next few minutes until it starts to boil. At this point, tighten the petticoat or replace the lower hose and then return to the top of the engine. Now even though a lot of fluid has come out, it’s not really everything that’s in your car’s plumbing system. In cold temperatures, your engine thermostat is off,

[00:02:00] Especially sticking old coolant behind it in your heater core. This is what a typical car thermostat looks like. In this cool display, we used a blow torch to warm the coolant of your engine from driving and simulate it to open the valve, similarly when it cools down, it traps the liquid behind the valve which needs to be replaced. Next, fill your radiator reservoir with distilled water. If you have trouble finding it, the reservoir will have hoses attached to the radiator

[00:02:30] Once full, replace the cap and then turn on your car. Leave your heat high and let the car rise to operating temperature. This will open the thermostat and flush the distilled water through the engine block and heater core and expel the remaining liquid, hence the name coolant flush. After 10 minutes or so, turn off the engine and let the car cool completely again. Then, open the petticoat again or remove the bottom hose again to get the last bit of dirty liquid out. Then tighten the belly or reattach the hose,

[00:03:00] Basically you repeat the same process as before. Be sure to dispose of the liquid spent properly. It is toxic and must be disposed of properly. Check with your local auto parts store to see if they can recycle or recommend where to go. Now for the most part, if not all liquids are flushed, fill your radiator with 50% coolant and 50% water. Auto parts stores offer premixed 50-50 gallons of coolant for convenience, but keep in mind that there is already some residual water in the system from the last flush so keep that in mind.

[00:03:30] We decided to go with 100% coolant and mix with 50-50 water. So for this particular car, it is three quarts of concentrated coolant mixed with two and three quarters of distilled water for the total coolant capacity of six quarts recommended according to our owner’s manual. It is advisable to replace the coolant with the same color or brand of coolant found in your car earlier to avoid corrosion co-mixing problem. Protect metal radiator from rust

[00:04:00] This is essential for avoiding small bits of oxidized shavings through the water pump and subsequently forcing the rest through the engine and heating system. Changing your coolant can extend the life of these parts and save you money and headaches in the future. See for more videos on car repair. As always I am Larry Kosilla from, thanks for visiting. (Hilarious hip hop music)

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