Constant Rush of air while engine is on

[sacherel]

Curious on this, when the engine is running, I feel a rush of constant hot air in the red highlighted section of the attached picture. What is the cause of this hot air?

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[blueroadster]

Engine running and heat rising.

 

[AZCWTypeR]

I suggest taping a small square of tissue paper to a stick and moving it around the bay to find the source.

 

[UCF120]

It’s the radiator fans pulling air into the engine bay

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