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      12-10-2015, 06:28 PM   #1
djbobbless
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Angry Coolant Leak but cannot trace it exactly

Hey guys.. Looking to get some advice on locating a coolant leak I'm having. The strange thing is it only leaks about 4 hours after driving (cooled down) from what seems like on top of the front turbo wastegate actuator. This slowly drips down to my hoses by the waterpump and then to the ground. Any advice on what kind of line is above said turbo that could be causing this leak? Expansion tank seems to be crack free and same goes for the hoses. that all lineup to the thermostat/waterpump.

Any helpful advice would be greatly appreciated. I figured somebody has encountered the same issue before.

By the way, pressure test was done to 20psi while hot but not cooled down yet.
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      12-11-2015, 01:19 AM   #2
WingMan42
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I'm having this issue as well, but mine does it intermittently. Same location, can see where is drips under the passenger flood light on the garage floor.. Haven't located where it's coming from. My father refers to these as cold leaks, common on diesels/ heavy duty trucks.. If I find where mine is ill let you know, but it will be a while before I get to it.. As I'm having other issues as well.
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      12-11-2015, 10:34 AM   #3
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I had one of BMW's O-ring fittings doing a similar thing on my transmission cooler. I replaced the O-ring in the fitting and the leak went away. Good luck chasing down your leak.
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      12-11-2015, 11:00 AM   #4
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i had this and it ended up being the seal on the radiator where the aluminum section and plastic sides of the radiator meet. Would only leak after running hard or longer trips. It separates at the alum/plastic as the temps rise in the radiator and expands under the pressure. I had the front end tore apart abut 4 times before I could locate the leak. Mine was leaking on the drivers side, right above the drain plug.
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      12-11-2015, 03:17 PM   #5
djbobbless
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Hmm thanks for all the advice guys. I went ahead and steam cleaned my whole engine to try and locate fresh coolant. Looks like it's dripping from the front of the block to the side near turbo eventually. Hopefully I'll trace the leak soon.
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      12-11-2015, 05:27 PM   #6
djbobbless
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Turned out to be the Coolant Outlet Hose that's on the thermostat housing by the oil filter housing that slowly drips down to the side of my turbos due to the slant on our engines. Glad it's not a big problem.
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      12-12-2015, 11:53 AM   #7
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good deal. easier fix than swapping out the radiator
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