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How do you replace the exhaust manifold on a 1999 Honda Civic LX?
Wiki User
∙ 14y ago
Ill assume that yours cracked.
You have to purchase a replacement manifold with a catalytic converter bolted up to it. It is usually a one piece set up. It costs about $300 after market or about $500 OEM from Honda.
To replace it:
-Remove the primary o2 sensor with a 22mm socket
-Remove the secondary o2 sensor at the end of the catalytic converter
-Remove the 12mm bolts that connect the manifold to the head
-Remove the 14mm bolts with spring that connect the down pipe to the exhaust
-Wiggle it out through the bottom or the top
-Reinstall the new one using these steps but in reverse.
Wiki User
∙ 14y ago
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