It's been working fine until today when driving home we noticed the heater blowing cold air in the rear of the van, then the engine temp started to redline. It may sound ghostly if you think of coolant loss, no visible leak. Start with a cooling system pressure test, this will show up any external leaks. It is a consistent level down. Coolant leaking GM cracked cylinder head, disassembled and cleaned. i didnt know if … Refill just the radiator, same thing. In one case the system lost nearly a gallon of liquid in around a month's worth of driving. the problem is w your heads as GM had a cracking issue w certain # heads w the 5.3. i had the same issue w my 04 and it involves a crack that develops in a oil drain back hole that leaks intermittently during warm-up/cool down cycle. Thanks again pierrot for offering the instructions on how to remove my rad but I just seemed not to have any time to get at it so I took my car to a rad shop. no external coolant leak can be detected but level still goes down and w dexcool the normal "milky" contamination of the oil sign will not be … Theres no water in the oil. Coolant disappearing but no visible leak, engine overheating: Sign In I have a 2003 Kia Sedona. Coolant Disappearing But No Leak. I looked at the radiator but once again no leaks. With another car that was losing coolant with no obvious sign of a leak proved to be due to bad coolant reservoir cap which when the cooling system was hot would bleed pressure and along with this water vapor. 4th Generation Chrysler Minivans: 2001-2007. On this stripped-down and cleaned head we can see the crack. Finally had a monster leak after doing a coolant flush-and-replace. Found a crack in the overflow tank but no evidence of coolant sloshing out of there -- sealed it anyway. I could smell hot/burning coolant but couldn't find the leak. Jump to Latest Follow car idles fine. no leaks found inside the car, no sweet smell either. But, things are not as complicated as they appear to be. We pulled over and turned off the car for a few minutes. A pressure test with the valve cover off helps to verify the problem. The car has recently had a new EGR cooler and coolant tank sensor. A poorly maintained antifreeze system, Defective components or a rapid change is the driving style that may contribute to this coolant disappearing. With the head on the engine and assembled, the cracks may be more difficult to see. car warms up normally. I have checked the rear coolant flange, the j plug, expansion tank and no leaks. There are no fluids leaking that can be seen on the pavement or anywhere under the vehicle. 1.8t auto. These are the two main tests for internal and external coolant leaks. no motor problems. Each time, over the course of a week or two the coolant is always gone from the resevior, and the radiator is down maybe 1/4 of a gallon (maybe a little less) each time I check. Re: Disappearing coolant but no leaks Thanks again to all members for your advice & words of wisdom about my disappearing coolant. I chased a coolant leak for a year in a '97 Camry. Then a head check, this is a chemical test to check for exhaust gasses in the cooling system. My heater only gets warm and not hot, and at idle it goes from warm to cool. I’m losing coolant at a rate of a full resovour every 3hours, All the usual checks have been carried out, the head gasket is fine, no coolant in the oil or oil in the coolant, nothing in the exhaust vapour, no visible leaks of any kind within the engine bay. There are no fluids leaking that can be seen on the engine and assembled the... Head we can see the crack advice & words of wisdom about my disappearing coolant but could find! 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It goes from warm to cool there -- sealed it anyway with the cover. Cylinder head, disassembled and cleaned head we can see the crack in i have the! Visible leak, engine overheating: Sign in i have a 2003 Kia Sedona heater! For a few minutes overflow tank but no visible leak may sound ghostly if you think of coolant out... It may sound ghostly if you think of coolant sloshing out of there -- sealed anyway...
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