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catalytic converter replacement


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aesmpz
New User

Aug 24, 2012, 11:05 AM

Post #1 of 10 (2022 views)
catalytic converter replacement Sign In

So I have a 94 Toyota Corolla that is not passing emissions, and needs a new cat. I figured, what's four bolts under the car, and saving myself a bit of cash? Wrong I was, all the bolts were rusted and seized on, it literally took 3 separate tries with various tools and the course of many hours to finally get the old one off.
Now I bought a directfit Magnaflow, and the new one does not fit flush against the flanges of the exhaust system.
There seems to be male pieces protruding from the flanges that go into the new cat but won't fit.
These protruding pieces lead to a gap between the flanges, much bigger than should be, the flanges were flush with the old cat.
So, what the hell do I do now, would grinding that male piece be my only option? And would that cause any vacuum/leakage issues?
Thanks


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Aug 24, 2012, 12:10 PM

Post #2 of 10 (1991 views)
Re: catalytic converter replacement Sign In

Don't grind those off. There are exhaust flange gaskets that slide over those protrusions. Did you get the gaskets ?







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aesmpz
New User

Aug 24, 2012, 1:07 PM

Post #3 of 10 (1981 views)
Re: catalytic converter replacement Sign In

Yes, it came with some gaskets, but there still was a bit of a gap, and the two flanges certainly didn't come flush together like the original cat did. What I did what double up the gaskets (as per a suggestion), and I'll drive the car around a bit and see if I can detect and leakage.


Hammer Time
Ultimate Carjunky / Moderator
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Aug 24, 2012, 2:53 PM

Post #4 of 10 (1975 views)
Re: catalytic converter replacement Sign In


Quote
What I did what double up the gaskets (as per a suggestion),


Who suggested that, your dentist?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



aesmpz
New User

Aug 24, 2012, 2:57 PM

Post #5 of 10 (1970 views)
Re: catalytic converter replacement Sign In

No some random fella off the internet. Wink
But in all seriousness, if the thing isn't leaking, and I can pass emissions, I say hey, why not?


Hammer Time
Ultimate Carjunky / Moderator
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Aug 24, 2012, 2:59 PM

Post #6 of 10 (1967 views)
Re: catalytic converter replacement Sign In

The problem with stacking round gaskets is that they usually don't align perfectly and make the problem worse.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



aesmpz
New User

Aug 24, 2012, 3:08 PM

Post #7 of 10 (1963 views)
Re: catalytic converter replacement Sign In

I could see that. Well, what would other options be? do they perhaps have fatter gaskets, so I can go with just one? or is there a way to either widen the female end, or reduce the diameter in the male end?


Hammer Time
Ultimate Carjunky / Moderator
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Aug 24, 2012, 3:35 PM

Post #8 of 10 (1958 views)
Re: catalytic converter replacement Sign In

I'm not sure what the issue is that you are having. One gasket is usually sufficient to seal them unless something is damaged and bent.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Aug 24, 2012, 3:44 PM

Post #9 of 10 (1952 views)
Re: catalytic converter replacement Sign In

I am going to guess and say you have the wrong cat. I noticed they have several part numbers of Magnaflows for that vehicle. Maybe a good thing to try is contacting Magnaflow's tech support and see what they say.

Tech Line @ (800) 817-3930





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 25, 2012, 3:35 AM

Post #10 of 10 (1934 views)
Re: catalytic converter replacement Sign In

From top - said this was a "direct fit" from Magnaflo -- well apparently not! I don't think doubling up gaskets is going to last long,

T







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