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I tried to change my cat. The part I ordered on Ebay was supposed to be a direct fit but it wasn't. I had to put the old one back on and now it's smoking . 

What could have gone wrong? 
I didn't torque it to spec
I think the old gasket might not have gotten a good seal because it's old and I didn't clean everything perfectly to get a perfect seal, didn't have time, thought I did a good enough job. 
I shook around the old cat when I took it off to get out sine white sand, not knowing I'd still need it. 
I used a lot of w d 40 to get bolts off maybe that's what's burning. 
Some symptoms
Light gray smooke comes out when I stop, I can smell the exhaust when I pull out. It's a lot of smoke but not enough that everyone at the stop light would notice. It's enough smoke to be not noticeable to everyone but if there were anymore people would stop me to tell me my car smoking. 
I don't think it's getting into the cabin, I only smell it when I pull off after a 15 second plus stop.
It's never done this before


About Me: I have worked with multiple firms
You can check Business explainer video, one of my work.

Tags: Animation, Automotive, Videos

Views: 31

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