My wife has a 2011 CR-V (2.4L engine). Could hear excessive exhaust noise, so she brought it to a local garage (not Honda) and was told that the whole exhaust system needs to be replaced, and that just parts alone would be over $2K. Don't feel like spending that kind of money on a 14 year old vehicle with 170K miles on it. Talked to another mechanic and he said it looks like he could save the primary CAT and just replace the secondary CAT and pipe. He works out of his home, has a good reputation, and his labor rate is relatively low, but the customer has to supply the parts. He told me what to order and to go to either Rock Auto or Detroit Axle. Two of the items are the exhaust manifold gasket (long with 4 exhaust port holes) and the primary CAT gasket (short with one hole) where it mounts to the exhaust manifold. Got the parts and dropped the car off the night before so he wouldn't be working on a hot engine. He called me back mid-morning the next day and apologized and told me that he couldn't save the primary CAT, and that after a more thorough inspection, that it would probably be a good idea to replace the entire exhaust system. He gave me a new list, which included the primary CAT and the exhaust manifold. Here's the problem: I can't even find an exhaust manifold listed anywhere. Everything refers to a combined CAT/exhaust manifold. I tried, using a mirror and flashlight, to see how things go together, but it's too tight for me to see what's really going on. Does this engine have an exhaust manifold that bolts up to the head and is separate from the primary CAT, or does this combination CAT/exhaust manifold bolt directly to the head? If that's the case, why does the Honda OEM parts website offer the 4 port exhaust manifold gasket (I searched by VIN)?

 

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Home >> Honda Truck >> 2010 >> CR-V 2WD L4-2.4L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Exhaust System >> Catalytic Converter >> Description and Operation

Catalytic Converter: Description and Operation

Fuel and Emissions System Description - Catalytic Converter System

Catalytic Converter System

Warm Up Three Way Catalytic Converter (WU-TWC) and Under-floor Three Way Catalytic Converter (Under-floor TWC)

The WU-TWC/Under-floor TWC converts hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) in the exhaust gas to carbon dioxide (CO2), nitrogen (N2), and water vapor.

WU-TWC (ATTACHED TO THE CYLINDER HEAD)





UNDER-FLOOR TWC





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"WU-TWC (ATTACHED TO THE CYLINDER HEAD)"

Thanks grcauto, that answers my question. I appreciate it.