Question: does this mean I need to drive the car around or is it sufficient to let it idle? Flush Out The Solution With Water. It does a throughout cleaning of the radiator’s inside properly. Not more than five minutes, that’s the ideal time you should leave the flush in your radiator. It said to leave it in for 15 minutes and then drain and flush the radiator with water. You should use whatever you want. When incompatable coolants are mixed [not flushing out the system completely], they can react forming a gel IF left in years without changing. The stuff eats away at rubber. Flush until the water runs clear. It's important to change your antifreeze seasonally. Changing the coolant requires draining the existing fluids and flushing the system before you add a new antifreeze solution. Now car works fine. Some of the flushes take longer than others. since i have it flushed out pretty good should i use the dex cool or keep using the green stuff that was in there? I flushed it again with water and it worked for about 5 minutes then stopped again. There are several signs that indicate you need to flush your radiator. I poured it in when i was at the store and drove 30 minutes home, by the time i got home it was dark, so my question is will it hurt to leave it in the radiator until tomorrow? Flushing your radiator is an important part of regular car maintenance. Replacing a few gaskets is much easier & less $$ than replacing the main engine bearings. I`m going to flush it with water again tomorrow and put antifreeze in it and test it again but I think I found the problem and fixed it. After that I stopped using anything that plain water for the flush & drain, then filling up with a 50/50 mix. It's dark and I can't be bothered tonight but will if it will damage the car. Keep an eye on the coolant level and the coolant temp gauge as those leak plugging agents can sometimes work for a while, then start failing. could the green antifreeze be causing all this junk in the cooling system? Let your engine cool down for 15 to 30 minutes before draining the fluid again. And on the thermostat. Had a coolant change come up and so used some plug material. If you do, make sure you let the car cool before draining this final batch of fluid. Better to trust a name brand product and follow their directions to the letter. Then sudden faster leak confirmed to be the water pump shaft seal. The heater didn`t work so I flushed the heater core with just plain water. Pour the radiator flush product into the radiator. The first step is to locate the coolant reservoir cap and unscrew it as this will help the radiator drain more easily. And a T-stat. I don’t think your problem is something clogging the heater core, I think you are not purging all the air out. Push the end of a garden hose into the top radiator connection stub, and seal it with rags. The flush has corrosive properties that will actually get all of the old antifreeze, rust, and scale cleared out. Let this serve as a lesson to others that the proper way to avoid a clogged heater core is to routinely drain and refill the coolant at regular service intervals. I’m pretty sure the heater core in your vehicle is made of aluminum. And while you can use water from a garden hose to flush the system, it is recommended to use distilled or de-ionized water for your final flush or for mixing with antifreeze. Experts recommend draining and replacing the antifreeze in your radiator every five years or 100,000 miles, whichever comes first. Because if any remained, bits can and might break off and start moving through the system causing more blockages. Do not let the cooling system temperature fall below 32 degrees F. The problem is seen most often when the radiator is only drained [< 40% of total coolant]. The hoses didn`t feel very flexible so I banged them on the cement driveway and I heard crackling crunching sounds,when I held the hoses up a lot of hard shiny brownish crude fell out. You need to get it out asap. This will contaminate fresh new Prestone Command® HD Antifreeze/Coolant added the cooling system. Generally, you have to flush your car radiator every 5 years or when you complete 100,000 miles driving. You would have to leave your heater core hooked up though when doing this because those fittings are intended to tee in your garden hose to one of the heater core hoses. Did no damage to the block though and with a new radiator my engine (500 Hp V8) only gets to the cool mark even after running hard :-) Close the radiator and reservoir caps. We had my husband’s radiator flushed at a chain place and they destroyed the radiator by actually somehow stirring up all the gunk and getting it caught in the radiator instead! The most common one is an overheating engine. Or at least ask VW if they have tested the seal material used inside the engine for compatibility with the flush agent you are going to use. However, it … Next place your pan under the radiator drain to catch the dirty fluid. Once you’ve opened the reservoir cap, open the drain to let all of the antifreeze out. running radiator flush through them is alright for a while but leaving it in there is kind of hard on the seals ,and yes i have seen it damage the seals in … I took off all the down stairs radiators and blasted them with a real powerful jet wash yesterday to clean any dirt out but they were not bad. Let’s look at how you can flush your radiator yourself, signs it’s time to, and best methods for flushing it. It is the final step. Check by catching some water in a glass jar and looking for sediment which you can see only in still water. From recent experience of about 2 years, I had a mysterious and extremely slow intermittent coolant leak in an older car. Irregular smells, like a hot maple-syrup-like smell or the smell of antifreeze, can also indicate you need to take a look at your radiator. After overheating on I-95 TWICE and bringing it back to the chain place 3 times, Honda figured out that it needed a new radiator. Make sure to follow the instructions on the flush's bottle to determine how long to let it sit, while paying attention to the car's temperature and making sure it does not overheat. And this is a sincere question/comment for your situation: did all the crud get removed from the inside of the hoses? The Zerex radiator flush will drain all of it out within five minutes. If this build-up is left too long, it can damage the radiator and lead to costly repairs. How long can a radiator flush be left in a radiator? It said to leave it in for 15 minutes and then drain and flush the radiator with water. Suggest not to use a flush agent unless you know for sure you need to. I flushed it a 3rd time using CLR,then plain water it worked for about 10 minutes than blew cold again. Today I drained the radiator,filled it with plain water, ran the engine for about 15 minutes then drained it again, I did that 3 times to get all that radiator flush out. No coolant leak from the head gasket. i figured that there must be crap in the radiator that was circulating and blocking the heater core so i got some gunk brand radiator flush and poured that in the radiator. If corrosion and scale build-up in your system, it can clog the radiator’s tiny passages, the water pump, the engine’s water jackets and even the heater core. A radiator flush is actually a normal maintenance item. Can’t say for certain the flush product was the cause tho. 01. of 05. If it's soap based a day or so but anything caustic or acidic should only be ran few minutes to no more than an hour at best and then flushed with clean water and the refill appropriately. Radiators are usually ignored until a problem develops. I really think the current fix is temporary. Radiator Flush - Is It Ok To Leave It Overnight? This goes against the laws of physics and can cause the radiator to stalemate air. A warranty is likely not an issue with this car, so you should only use Dexcool if you plan to leave it in there a long time. Reviving an old heating system is a more cost-effective way to return warmth to a property than the installation of a whole new system. You should never need to flush the system if you drain and refill often enough. After 4 to 6 years or after driving 40,000 to 60,000 mi (64,000 to 97,000 km), it’s recommended that you change the coolant in your radiator to keep your engine running well. There are a couple of different types of flushes. If you’re still experiencing problems with your cooling system, you can try to do a second flush or take it into a professional. In terms of a chemical flush that is made for automotive use, you need to follow the instructions on the bottle that tell you how long to leave it in. The coolant in your radiator is a 50/50 mixture of commercial coolant and water, and together this solution makes a liquid that helps cool your engine by circulating through the cooling system. In the end I didn’t flush the radiator but added one can of water pump lubricant and one can of radiator leak plugger to the new coolant. Please share this with your friends, Austin Davis. You can accidentally breathe it in or it spreads to the skin and it causes chemical burns. wouldnt this take more time to get through the system? This is the highest-performing radiator cleaner and flush you can buy — a proven formula that cleans the entire system in 30 minutes or less. Be sure to check with your local authorities on how and where to safely dispose of old fluid. Prepare for Your Car Radiator Flush . For extended cleaning, you can drive the vehicle for 3-6 hours with the flush in the system. In short, I think the entire system needs to be thoroughly gone through by a good radiator shop. The basic process is to put in the flush, turn on the engine to circulate the fluid, let the car cool, and then drain the flush. Hot air likes to rise so if the radiator is dissipating heat … Liquid flushes are also caustic, and you will need to take the proper precautions to guard against spills and splashes. Power Stroke Selected as Best Diesel over Cummins and Durama... Be Prepared: 10 Car Essentials For Winter [Buying Guide], The Advantages of Buying Car Parts Online, Copyright © 2021 Autowise. In her free time, you can find her reading the latest book, discovering new hobbies, or running in the desert. If the gunk radiator flush doesn`t work would it hurt to put CLR in the radiator and run the engine for 5 minutes or so? I’ve used a commercial brand radiator flush product (as I recall it was made by Prestone) on my truck, and it seemed to work ok. I’d never put CLR into my truck’s cooling system tho, no telling what it would do to the gaskets. The Mighty Fumoto Valve: Oil Changes Made Easy [Review], Ultimate Car Wash Kit Review And Buying Guide For 2020. Disconnect both hoses from the radiator. Usually, it takes anywhere from 30 to 60 minutes to flush a radiator. How Long Should the Flush be Left in the Radiator? Mechanic refilling auto radiator. Idling is just fine. Congrats on your success. Gotta be careful that bits don’t move to smaller blood vessels (like in the brain) and clog them. Serious crud comes from contamination and/or corrosion in the system, and both are signs of bigger problems on the way. Both products state not to use it in systems made of aluminum or copper. The process is fairly universal, but some things can vary so, again, be sure to read the directions. Once the old coolant is drained, pour in your choice of radiator flush. After adding the flush solution, the instructions say I need to run the engine for at least 10 minutes before flushing the system several times with clean water. If the flush and the metal of your radiator are incompatible, the flush will do more harm than good. We recommend the following: Once you’ve determined that you need to flush your radiator and gathered the appropriate supplies, the next step is to drain the coolant from the radiator. I have reverse flushed heater cores sometimes to get them to work better. In a 12 gallons system that equals up to 3 to 4 gallons of contaminated coolant or flush water left in the system. i figured that there must be crap in the radiator that was circulating and blocking the heater core so i got some gunk brand radiator flush and poured that in the radiator. You may need to turn on the car again to circulate the fluid. Flush Out The Solution Simmer Inside The Radiator. I was planning on removing the t-stat and running a bottle of the Prestone flush stuff. @tardrex, do us a favor will you, if you blow out any rubber hoses (radiator/heater) over the next couple of months, let us know. Drained it and then filled with warm water and rad flush. There was dried rusty crude inside the heater core pipes,i scrapped it off. How long does a radiator flush take? Flushing your radiator is a fairly easy process that doesn’t require a long list of supplies. Never tried, but I’ve heard that Cascade (not the scented one) works great also. If, after flushing the heater with water and an automotive chemical flush, the heater doesn’t work, you need to get it diagnosed and stop working on it based on assumptions. Run the engine for about 10 minutes with the heater on high after it reaches operating temperature. It could have been the water pump and could have been something more major. At the first blown hose, let us know which brand of chemical flush you used. Haley is a writer, reader, and life long learner. Some other signs to watch for include if you spot a coolant leak (look for green or orange fluid pooling under your car) or if you can see debris in your coolant. As time goes on, your car's radiator builds solid deposits that can clog the cooling system. Also known as the Bucket Flush, the 36 Hour Flush or the 3 Day Flush, (yes I know that there are more than 36 hours in 3 days...) this type of flush is very useful for electrolysis removal, oil emulsification, aluminum oxide removal, rust removal, and … Powered by Discourse, best viewed with JavaScript enabled. The radiators were heating up fine but just thought they were a bit small for the size of the room. Of fluid are powerful but have more risks associated with their use can keep system! 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