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Sizzle sounds without using AC

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Old Feb 12, 2025 | 09:32 PM
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Default Sizzle sounds without using AC

I have the sizzle sounds in the engine area after driving like many c5 owners, but I have not been using the AC the last few times while driving.

Is it possible that the AC could be dripping onto my long tube headers even when the AC is not in use? Anything else that could explain this?

Last edited by mljls1; Feb 12, 2025 at 10:03 PM.
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Old Feb 12, 2025 | 10:01 PM
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Originally Posted by mljls1

Is it possible that the AC condenser could be dripping onto my long tube headers even when the AC is not in use?
Considering the condenser is in front of the radiator......no....that is not possible.
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Old Feb 12, 2025 | 10:04 PM
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Corrected my original post to remove condenser
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Old Feb 13, 2025 | 09:30 AM
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More likelier the coolant reservoir tank dripping.
Take a drive,pop the hood and wait for it
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Old Feb 13, 2025 | 08:05 PM
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Originally Posted by pjdbm
More likelier the coolant reservoir tank dripping.
Take a drive,pop the hood and wait for it
That makes a lot of sense because the noise seems to be a bit louder on the passenger side of the car. I'll go out tomorrow and have a look. Would the coolant reservoir drip naturally or would that indicate a leak? Coolant level and temps seem OK so not a major leak if so.
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Old Feb 13, 2025 | 08:29 PM
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If it's leaking it's time for a new one
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Old Feb 13, 2025 | 08:56 PM
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Originally Posted by Smoken1
If it's leaking it's time for a new one
if it's leaking, its getting replaced for sure
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Old Feb 13, 2025 | 11:42 PM
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confirm the source of the leak/ sizzle noise first
sometimes looking up from the bottom will nail it
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Old Feb 14, 2025 | 05:09 PM
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I took the car out for a 1 hr drive today after verifying coolant level was good. I did not use AC. Popped the hood when I got home to see if I could see anything from above but unfortunately I couldn't. I checked everywhere with a flashlight. It's more of a loud drip noise than a sizzle. The sizzle noise seems to be more prominent when I run the AC.

I won't have the ability to lift the car for a few more days to check from underneath but I'll report back once I do.
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