What is the recommended method to verify leaks after resealing intake ducting?

• A. Run engine and spray soapy water on joints to detect leaks
• B. Use an infrared camera to locate leaks
• C. Remove ducting, apply sealant, reassemble, use soap and water to detect leaks
• D. Feel for leaks with hand while engine runs

Answer: (C)

Verifying leaks in the intake ducting after resealing is about confirming the system is airtight when it’s back together and running. The recommended approach is to complete the resealing steps—remove the ducting if needed, apply the sealant correctly, reassemble the ducting—and then test for leaks using a soap-and-water solution on the joints while the engine is running. The soap bubbles reveal any escaping air clearly and immediately, giving a straightforward indication of leak points. This method is simple, inexpensive, and reliable for confirming airtight joints. It’s safer and more practical than relying on hand-feeling leaks, and it’s more dependable than some tests with infrared cameras, which might miss small leaks or require additional equipment.