narang Posted August 21, 2014 Report Share Posted August 21, 2014 How to check for internal coolant leak in the cooling system? And is the internal coolant leak really bad for the car? Link to comment Share on other sites More sharing options...
ethan Posted August 28, 2014 Report Share Posted August 28, 2014 Internal coolant leaking is actually bad for any engine. Why if you ask? It’s because it’s inside the engine and you cannot see it. It damages the engine for inside and do don’t even know. And guess what? Repairing the internal coolant leak is actually an expensive job. There are few engine parts that are affected badly because of internal coolant leak: Head Gasket: If the head gasket is gone bad, then the coolant leak goes inside the engine into a cylinder/crankcase. So if there is internal leaking in the head gasket, it spoils the motor oil, spark plugs and bearings. If the leak is slight and not too bad, I suppose the sealer can work. But ultimately, one needs to replace the head gasket in near future. Blocked Engine: If the engine is blocked, the leak becomes really severe. If there is a crack in the cooling jacket, the coolant will leak into the engine and the cylinder head easily. This damages the pistons, rings catalytic converter and also the oxygen sensor. I faced this kind of the leak before. And it was so severe that the engine couldn’t crack when I tried starting my car. The only way to diagnose the internal coolant leak is by pressure testing or by using a block checker. It helps in popping out the coolant on the top in order to know where exactly the leak is. For pressure testing, one can use the Pressure test kit which is easy to use and quick to judge the leak. But believe me; internal coolant leak is really bad. And generally the answer to repair such a leak is replacing the engine part which is gonna cost you lot of money. To avoid that, it’s really important to have a keen check on the coolant level always. So if you know the level is gone down, you can quickly diagnose the leak and seal it before it’s too late. Link to comment Share on other sites More sharing options...
gshane Posted May 18, 2015 Report Share Posted May 18, 2015 That's right ethan. This is something that can damage the engine and the compromise the integrity of the car. That's why it is a good idea to check this area every once in a while. Link to comment Share on other sites More sharing options...
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