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Radiator leak can't find

Old 03-17-2019, 11:54 AM
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Default Radiator leak can't find

Looseing anti freeze but cant locate leak do not see drips anywhere.
Looses about a quarter gal. Every two to three days.
Maybe about 30 miles driving
Old 03-17-2019, 03:50 PM
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I've moved your question from General Tech Help to S-Type forum. This is the place to post technical questions about your model.

Old 03-17-2019, 05:23 PM
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It could be the pipe in the valley underneath the supercharger.


It seems to be a common complaint.
Old 03-17-2019, 08:44 PM
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Pressure test cooling system (15 psi) when cold. Your leak should surface. Good luck
Old 03-18-2019, 11:40 AM
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Originally Posted by abonano View Post
Pressure test cooling system (15 psi) when cold. Your leak should surface. Good luck
+1 on that.

I've found with the engine running and coolant warm, small leaks often evaporate quickly, making them difficult to identify. I've had good results with a pressure tester on a cold engine.

If you do find an external leak, be careful with the diagnosis. The fan tends to blow any coolant around and it may collect in other spots and steer you wrong. That's why I like the pressure tester, so you're not dealing with potentially misleading results from coolant being blown around by the fan.
Old 03-19-2019, 10:16 PM
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Pay particular attention to the radiator header close to the DCCV area.
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