I had an exhaust leak from the ebay o2 housing to the Ultimate Racing DP, they just don't come together completely.

I put some exhaust silicone on it and the problem was gone. I drive yesterday and after some hard pulls I noticed that my AFRs at idle are high, like 18 19.

Today when I leave my house I notice a little noise coming from there. So now I know that there is a leak again. What do you guys suggest I do? Are the high AFRs at idle because of this leak?

 

anybody????????

 

any input on this?

 

Nitrous.

In all reality, I think that the best way to fix it is take it to a exhaust shop, see if they can bend the DP a tiny bit to get it to mate with the o2 housing better. That would be the only fix I can see as not a bandaid. Either that or just use the donut gasket with a lot of silicone, and let the silicone seal up for like a day before you drive it.

 

Maybe getting rid of eBay o2? I heard good things about eBay o2s, but still.... Or it happens a lot when one brand doesn't play along with the other

 

IIRC, the UR DP doesn't use the mesh donut gasket right?

 

yes i usd the stock mesh gasket on the O2, the DP doesnt have a donut. The ultimate Racing DP is not bend enough, therefore there is a leak. I have actually put better exhasut silicone. I will see how it holds up tomorrow.

 

Get the surface planed flat and use a proper exhaust gasket. Takes 10 bucks at a machine shop.

 

actually i used the mega copper gasket maker which is good for up to 700*C and have had no problems every since. The afrs are back to normal 14.7-15.2. Thanks eveyrone.

 

Put your stock 02 housing back on and see if there is still a leak. Or put the stock downpipe back on. This way you can see which of the 2 parts is having a problem.