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.
Dexcool coolant brown professional#
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.
Dexcool coolant brown cracked#
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. It was a whole hell of a lot cheaper than having it professionally done, and only took about 20 minutes.Have you seen sludge? That thick, brown-colored substance you can see after you open the cap on your car’s radiator. There is also a flush and fill kit I bought at Wal-Mart that made back flushing the cooling system of my Jeep a cinch. There is some stuff you can buy at Wal-Mart or parts stores that cleans out the gunk and shit that accumulates in the cooling system. The question is: is there a good clean-the-beejeeses-out-of-the-coolant-system kit, or should I have it professionally flushed? The heat routinly climbs to the last quandrant of the gauge, which is unusual. Other wise it cools down like the car is off. For instance: I only get heat when the accelerator is push down. The only thing now is that the brown sludge is still stuck to the inside of the radiator, and the car is not cooling it self like it used to.
I also pulled off the heater hoses and flushed the core until it was clear. I pulled off both hoses and flushed the radiator until it ran clean. I don't know of the dexcool had gone bad and somehow seperated, but this was not coolant anymore: it essentially looked like dirty water. I finally got around to flushing the coolant. Since then (over 25K miles ago), no more sludge, and still no head gasket, or other gasket problem. Had the sludge always as well, until I did Uppers and lower intake gaskets (there wasn't a problem, just preventative maintanance) and flushed to original DexCool. The coolant is still clean right? As was mine in my '98 Monte. That almost always causes a buildup of brown sludge on the filler neck on the rad, and on the cap itself. More than likely (since it seems that everyone fails to mention): they've been putting a stop-leak equivalent in from the factory since late 90's/ early 2000's IIRC. You could pretty much elimate every possibility of a problem by simple observation and testing. Also, do a compression test, or an air test like someone mentioned (pulling adjacent plug out and listening) Pressure test the coolant system. If it's a bad enough head gasket problem, you can usually see bubbles in the coolant sometimes only cold, other times only hot.
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