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#1
03-09-2006, 11:12 PM
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cracked exhaust manifold/bad o2 sensor
Okay so after quite a bit of troubleshooting, it turns out that my exhaust manifold is cracked (whether or not this caused the o2 sensor to go bad, i don't know).
So my first question is: can/should it be welded? If not, does anyone know where i can get a california acceptable manifold? i haven't been able to find an aftermarket one, only from honda... any help is appreciated  rachael 
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#2
03-10-2006, 10:05 AM
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Re: cracked exhaust manifold/bad o2 sensor
Take the car to a good muffler shop. Of course it depends on the location of the crack, but sometime they can weld the cast iron manifold without a problem. The other option is to go to s junkyard and pick one up. Like you say aftermarket manufacturers make headers, not exhaust manifolds. Anyways, good luck.
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#3
03-10-2006, 02:17 PM
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Re: cracked exhaust manifold/bad o2 sensor
I had the exact same problem as you. Don't know about welding it but I had mine replaced (the Cat). around $800 - my o2 sensors were fine. I actually drove with it like that for a few months and didn't have any problems - I only had it fixed because it was time for my emissions test. Good luck getting yours fixed.
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#4
03-10-2006, 06:23 PM
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Re: cracked exhaust manifold/bad o2 sensor
__________________
99 [email protected] psi si- I voted for the Terminator for Gov. 95 HB- B16a2- SC34@12psi WTB: USDM B16a2 or B16a3 complete short block. pm is the key. FS: B series InlinePro cast mani, PnH RC 550s, and Hondata S2b. pm me.
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#5
09-18-2006, 06:55 AM
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Re: cracked exhaust manifold/bad o2 sensor
i had this exact problem as well..
I actually drove my car for about a year with the manifold cracked.. hah! stock manifolds are expensive... so I did this: bought a header with an o2 bung.. and installed a straight "racing" cat for the secondary o2. works like a charm. =) As for welding it... not such a good idea.. My best friend is a welder.. he welded my manifold.. and it only lasted for about 2 weeks... Oh.. by the way.. the crack gets worse if you do nothing about it.. I was probably down to about 85 horsepower.. haha.. oh ya.. it was NICE.. Annd.. yes.. the manifold being cracked will effect your o2.. I replaced it twice in that year.. damn Im lazy.. Last edited by azwethinkweiz; 09-18-2006 at 02:27 PM.
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#6
08-31-2008, 11:44 AM
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Re: cracked exhaust manifold/bad o2 sensor
You can have the manifold welded with a powder tourch welder with 100 percent success I have been welding cast iron exhaust manifolds for the last 15 years every thing from cars to boat and tractor manifolds with no problems.
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