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03-26-2022, 01:31 AM | #1 |
Scooby Newbie
Member#: 529392
Join Date: Mar 2022
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2009 impreza 2.5i developing metallic tapping sound
Last edited by ok-mood93; 06-01-2022 at 02:22 PM. |
03-27-2022, 11:54 AM | #2 |
Scooby Specialist
Member#: 283429
Join Date: May 2011
Chapter/Region:
South East
Location: Down yonder.
Vehicle:2016 Fuji Sunfire 03 Silver |
Exhaust leak. Either blown out gasket at manifold to head (look for missing nuts/black streaks) or a crack. Most likely a crack in the flex joint between left manifold and catalyst (pleated part in image below) this is the most common cause. It is hidden by the heat shield. You get a free catalytic converter when you buy the exhaust manifold!
Worst result it will start causing a rich condition due to air diluting exhaust before the A/F sensor. Eventually trip fuel trim codes as the crack worsens/more air infiltrates. |
03-27-2022, 01:04 PM | #3 |
Scooby Newbie
Member#: 529392
Join Date: Mar 2022
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[deleted]
Last edited by ok-mood93; 06-01-2022 at 02:22 PM. |
03-28-2022, 08:30 AM | #4 | |
Scooby Specialist
Member#: 283429
Join Date: May 2011
Chapter/Region:
South East
Location: Down yonder.
Vehicle:2016 Fuji Sunfire 03 Silver |
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