Mystery Coolant Leak... - Hyundai Forum - Hyundai Enthusiast Forums


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Old 05-08-2017, 12:38 PM
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Default Mystery Coolant Leak...

Hi everyone! I am new to the forum. Two weeks ago I bought a 2002 Hyundai Elantra GLS with 185K miles on it for my daughter to drive to high school and college. It has been a good little car with a lot of power. Since we bought it we put about 180 miles on it with no overheating issues or engine problems. The only issue was the condenser was damaged and I replaced it with a new one. I did the job myself. Since I was there I decided to flush the radiator and reservoir tank. When it came to refill with coolant I used UView 550000 Airlift cooling system air bleeder which i've used before on my 2005 Chevy Aveo. It uses an air compressor to vacuum the lines and refills the engine with coolant with a breeze. Problem I noticed was it never held a vacuum which tells me there was a leak. I checked the radiator and upper and lower hoses I didn't see anything visible. I went ahead and filled the radiator with coolant by just pouring coolant in from the jug. I ran the car for a while until it got operating temp and then I notice coolant dripping from a corner of the oil pan. Specifically, left side corner of the pan (belts side) closest to the firewall. It was just a slow drip. I placed a cup to catch some of it and it was antifreeze. I topped the coolant and drove it around town, did a few errands while keeping an eye on the temp gauge. No overheating. Got home and checked and it still had a slow dip in the same area. The following morning I checked the radiator for coolant and I didn't see any. I checked the tank which I had topped off full and most of it was gone. I checked under the car and it was dry as a bone. I filled the radiator up again with coolant and squeezed the hoses a bit to burp out any air that's when I saw the drip again. I hadn't even started the engine and it was dripping again. I can't seem to find where the leaking is coming from. I hate to think it could be the head gasket but this issue never showed up until I worked on the condenser. Could the Airlift tool damaged something? What areas should I check for? Water pump maybe? I checked the motor oil and oil cap and it does not look milky. Any suggestions are appreciated.
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Old 05-08-2017, 08:00 PM
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Pressure test the cooling system.
Visual inspection and run hands along .. feel for wetness.
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Old 05-18-2017, 05:58 PM
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Default Leak found.. I think.. water pump??

I did a pressure test and the leaks seems to be coming from the crankshaft then running down along the side of the oil pan. Hard to see but it seems like it leaking form behind the timing cover. Could it be the water pump that is leaking? I don't see anything coming out of the weep hole. Could my vacuum did anything to it?
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Old Yesterday, 10:19 AM
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The water pump would be my guess.
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Old Yesterday, 11:01 AM
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Check to see if the timing belt is due for replacement
If it is then change it and the water pump (along with the idler and tensioner pulleys)
If it isn't then you probably want to see if the leak is from the water pump anyway.
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