Dexcool coolant brown9/10/2023 Don't know if I need to do it, but I've never had a water pump failure. Because I'm old school, I also dump in a can of water pump lubricant when I change the coolant. You can get distilled water at the grocery store. When I mix my own, I use distilled water in order to keep excess minerals, especially calcium, out of the cooling system. OAT (purple) will be a disturbing brown, but still 100 OAT coolant Nov 28. Unless I'm dealing with substantial amount of aluminum in the cooling system, I recommend a 50/50 mix of the green stuff. Com Super Tech Dex-Cool Compatible 50/50 Antifreeze, 1 Gallon - Walmart. Upon doing a flush it was amazed that the radiator and everything else I could see. Besides clogging up the radiator and heater, it can also compromise even heating/cooling of the block. The coolant itself was a murky-looking brownish orange. And getting the crud out is what flushing the block is about. i stuck the water hose in the fill cap, and o. after i did that, i ran the motor like a boat engine. so i flushed it again today with the same prestone rad flush fluid. Getting the big crud out will make it easier to get the little crud out. I did that, and with the cap off with engine running, waiting for the engine to cycle the water, the water level gos down, and i fill with water. Once dry, rust clumps can be removed through the freeze plugs with a magnet-on-a-stick kind of thing. You can either let it set a few days or use a hair dryer to get rid of the moisture. While the freeze plugs are out you will have access to the bottom of the cylinders where a lot of rust settles. If they are getting a little weepy, now may be a good time to change them out. You also didn't specifically say if you had changed out the freeze plugs. The green stuff can look like pond scum after a while. Give us a call today at Beyer Motor Works.You didn't say if you were using DexCool (orange stuff) or polyethylene glycol (green stuff) anti-freeze. Upon further inspection we can help you determine if there is more serious cause of the buildup and catch it before it causes a more serious problem in your engine. These are just the main causes of the slime or sludge that builds up in your radiator. You will need to have your system flushed properly when the intake manifold gasket is repaired, the oily sludge left behind can cause costly damage to the cooling system. In this case, the cooling system is not to blame. Intake Manifold Gasket – When the intake manifold gasket leaks, some oil can run into the cooling system creating sludge in the coolant. We suggest if you see this sludge build up in your vehicle to take it to a professional for a chemical flush. Only a chemical flush will remove the sludge. The residue left behind by the breakdown is very sticky and thick like mud. According to complaints received by Consumer Affairs, Dex-Cool reacts with the plastic sealing surfaces, causing the intake manifold to leak. Unfortunately, this new technology hasn’t worked entirely to the desired design purpose. This coolant was designed to last longer than normal antifreeze, only needing to be changed every five years instead of two. ![]() If left untreated, overheating and leaking can lead to very expensive repairs.ĭex-Cool – Some vehicles require a coolant called Dex-Cool. This sludge can block the flow of coolant through the lines which causes the engine to overheat and leak. Once the corrosion begins, rust, sludge and scale build up through the entire cooling system, including into the engine. As it degrades, coolant loses its protective qualities, PH levels change, and corrosion sets in. Radiators, like most parts in your engine, are made of metal. A breach in the system can contaminate coolant with transmission fluid.Ĭorrosion – this is the most common cause of sludge build-up in a radiator. Vehicles with automatic transmissions, the engine-cooling system cools the transmission. Mixing of mismatched coolants can cause the additives to “drop out” of the solution and form sludge or slime.Ĭontaminated coolant – a bad head gasket or cracked cylinder head can allow oil and coolant to resulting in sludge. These additives are supposed to guard against corrosion, cavitation and scaling. The base of the coolant is primarily responsible for providing a protection from freeze and boil-over. Since one of the leading causes of roadside breakdown is cooling system failure, pay attention to the condition of your radiator.Īdditives – coolant consists of a base (typically ethylene glycol or propylene glycol) mixed with additives and water. However, your engine probably overheated because of sludge build-up. You might have noticed it now that you noticed your engine has been overheating. Have you seen sludge? That thick, brown-colored substance you can see after you open the cap on your car’s radiator.
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