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Old 06-19-2010, 01:45 AM
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Does the 2.5L engine have 2 catalytic converter?

Well today my dealer told me my catalyst converter was bad. I assumed he was talking about the main one underneath the car since he did not say "precat".

I looked on my receipt and they replaced the manifold which shocked me since I thought the manifold included the "precat".

Can someone tell me every single component to 2.5L exhaust system (stock)?
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Old 06-19-2010, 01:54 AM
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Should be one after the header (AKA) precat and the main cat under the car right before the resonator.
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Last edited by Tarik; 06-19-2010 at 01:17 PM.
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Old 06-19-2010, 02:04 AM
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I am looking under the car now. I see 4 main components from engine to bumper.

1). Exhaust manifold with precat. 100% sure
2). main cat not completely sure
3) resonator (very long) not sure.
4) muffler (right by the bumper) not sure.

Can someone verify these parts?
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Old 06-19-2010, 02:08 AM
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From front to back you will see this

1) Manifold with precat
2) Flexpipe
3) Main cat (looks like a pipe balloon)
4) Resonater that is long as shit
5) Big ass muffler by the bumper that dumps out to 2 small exhaust tips.

Thats all!
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Old 06-19-2010, 02:28 AM
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Here pictures of the components minus the flex pipe.

Correctly labeled according to 200hpAltima?

manifold with precat


main cat


resonator


muffler


I want to make sure these are correct before I call the dealer about this issue we (service guy) are having about terminology.

Last edited by bob1234; 06-19-2010 at 02:31 AM.
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Old 06-19-2010, 02:31 AM
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you got it
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Old 06-19-2010, 03:22 AM
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Look at the beautiful crimp before the converter, thanks nissan
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Old 06-19-2010, 03:24 AM
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Quote:
Originally Posted by bob1234 View Post
Here pictures of the components minus the flex pipe.

Correctly labeled according to 200hpAltima?

manifold with precat


main cat


resonator


muffler


I want to make sure these are correct before I call the dealer about this issue we (service guy) are having about terminology.
correct
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Old 06-19-2010, 04:13 AM
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Thanks everyone. I hate taking the car to the dealer, but I wanted to make sure the code was the precat (p0420). When the service guy called telling me it was the cat under the car, I did not want to mess with cutting the pipe and find someone to weld a new cat back on. So, I decided to have the dealer change the cat underneath.

I found out when I popped the hood the precat looks new which really ticked me off.

So make sure your service guy knows his stuff. I could have just paid them $95 to diagnose the problem and I would have changed the precat myself.

Last edited by bob1234; 06-19-2010 at 06:52 PM.
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Old 06-21-2010, 02:12 AM
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Quote:
Originally Posted by bob1234 View Post
Thanks everyone. I hate taking the car to the dealer, but I wanted to make sure the code was the precat (p0420). When the service guy called telling me it was the cat under the car, I did not want to mess with cutting the pipe and find someone to weld a new cat back on. So, I decided to have the dealer change the cat underneath.

I found out when I popped the hood the precat looks new which really ticked me off.

So make sure your service guy knows his stuff. I could have just paid them $95 to diagnose the problem and I would have changed the precat myself.
I dont think im following you correctly, b/c even the cat underneath the car is gonna come as a pipe assembly with no welding required....

and the manifold cat on the 2.5's are always the ones to shit.

what year and how many miles do you have?
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Old 06-21-2010, 03:14 AM
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I was thinking the dealer had universal cats for most of their cars, but I now think they would just replace the whole front tube assembly.

I have a 2005 2.5 with around 131,000 miles on it.
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Old 06-21-2010, 03:37 AM
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Quote:
Originally Posted by bob1234 View Post
I was thinking the dealer had universal cats for most of their cars, but I now think they would just replace the whole front tube assembly.

I have a 2005 2.5 with around 131,000 miles on it.
For the most part when you go to a dealer, nothing is "universal" i bet the part number for your manifold was a 14002-9J130?
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