Hi JERRYHAMMOND56,
Since you have worked on the cooling system, it is possible that the smell is coming from residual coolant spilt onto components in the engine compartment.
Coolant would leave behind a smell trail that do not go away easily and is accentuated by heat. Any residual coolant sitting atop the transmission, recesses of engine or suspension areas have to be cleaned by washing away with water.
On the other hand you need to test for leakages. Water pump, radiator hoses joint, radiator drain cork and thermostat housings are common places of minor leaks. A pressure test would be the easiest and fastest way to go about. Check out the link below on how to go about.
https://www.2carpros.com/articles/radiator-pressure-test
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Monday, May 28th, 2018 AT 8:54 PM