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Antifreeze puddle on time change cover on 1990 Ford Mustang LX

I have changed the water pump and theromstat on my mustang 302. Now I have antifreeze puddling up on the timing chain cover on the driver side. I re-sealed the theromstat housing and still have the puddling.I will wipe it up and with 2-3 hours is back.

Asked by for the 1990 Ford Mustang LX
Are you uncertain as to where the coolant is coming from? Is it traveling to the timing cover, or is it originating there? A 1990 5.0L could very well have a leak from the housing itself. Or it could be from a worn out hose not sealing entirely. Check clamps and even pull the hoses off, looking for pin-holes or cracks. When you disturb them, that's when they especially start leaking as they are aged.