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Old 03-25-2015   #6
Tooljunkie's Avatar
Join Date: May 2014
Location: Lac Du Bonnet, Manitoba,Canada
Equipment: L1501,home built carry all, mini plow blade.
Posts: 4,113
Default Re: occasional coolant smell- normal?

Pressure-vacuum system. As engine heats up, coolant expands. At some point it expands enough to purge some coolant into overflow tank. As engine cools it draws that expelled coolant back into rad. So likely what you are smelling is that burp of hot coolant going into overflow. Marking tank when engine is cold and using that as a reference before starting will help you derermine if its leaking or not. A pinhole of any sort will leak. Will leak more when hot.

Hose clamps will seep if loose.

Had issues with rads that would leak in cold temps,aluminum with plastic tanks all seep in the cold.
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