12-11-2019, 10:07 PM | #1 |
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N26 VRSF Downpipe Exhaust Leak
I installed a VRSF catless downpipe myself with my friends.
My car is a 328i with the N26. When my engine is running, I can smell the exhaust gas from the engine bay, not the rear of the car. I can still feel fair amount of exhaust coming out from the back, but I'm worried if I have an exhaust leak. People with catless downpipes, do you also smell the exhaust gas from the engine bay?
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12-12-2019, 06:18 PM | #2 | |
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Alpine White 12' F30 328i 6MT (SOLD) Injen CAI | Bootmod3 Stage 1 | VRSF 5' Intercooler| Mishimoto Catch Can | 335i M Performance Exhaust | H&R Super Sports | HRE FF01 w/Hankook Ventus Evo2 | M-Sport Retrofit |
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12-12-2019, 06:43 PM | #3 |
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Did you change all the gaskets\clamps or reused the old ones?
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12-12-2019, 08:52 PM | #4 |
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I reused the clamps on the top(manifold to dp).
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12-15-2019, 04:31 PM | #5 | |
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Now that my exhaust leak is fixed I have made the following observations: When you do a cold start with an exhaust leak, the car has exhaust note from the front of the car, instead of mechanical engine noise After it was fixed, it no longer smells in the car or the garage I couldn't use the A/C because the smell would come in the car, now it isn't an issue. Your car just sounds super LOUD |
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12-15-2019, 05:23 PM | #6 | ||
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For my car though, I can't smell the fumes in the cabin. A/C smells fine as well.
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12-15-2019, 05:29 PM | #7 | |||
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Basically a car that has no exhaust leak only produces exhaust note from the rear of the vehicle, and at cold starts it is most noticeable |
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Jayden_F87900.00 |
12-16-2019, 11:39 AM | #8 |
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Since you do not smell anything inside the cabin, it think you are fine.
That being said, it would not hurt to double check install
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12-16-2019, 01:19 PM | #9 | ||||
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12-17-2019, 08:02 AM | #10 |
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I used same V band and the little cardboard asbestos gasket on the turbo when I installed mine. I also made sure it was very square on the turbo without nothing else on it and tighten it up but not quite all the way. Then I put the copper high temp silicone on the down pipe to the mid pipe connection using its original band. All worked good no leaks. With proper downstream O2 sensor spacing there has been no codes in 3000 miles. Now with BM3, which I have only had for about 200 miles, I think it might be clearing codes but I checked again before I flashed to BM3 and did not have any.
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MODS: BM3 Stage 2/93 Octane OTS, Active Autowerke BMW F Chassis Intercooler, VSRF Catless Down Pipe, GFB DV+, Injen Evolution Intake, Red Line MTL for Transmission, NGK SILZKBR8D8S gapped at .24", Dinan Shockware, Cooper ZEON RS3-G1's and Hawk HPS 5.0 Brake Pads all the way around. |
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12-17-2019, 11:20 AM | #11 | |
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Maybe I should do something like that just to make sure. I've been driving around 500 miles since install and still no CEL (yet).
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12-17-2019, 08:33 PM | #12 |
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isn't it recommended to buy all new V clamps when doing this ? it's like $20 per clamp
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12-19-2019, 05:36 PM | #13 |
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I forgot to get them before install :/
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12-19-2019, 08:43 PM | #14 |
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I didn't get new clamps at first and the turbo-downpipe clamp loosened up extremely badly after a few thousand miles. I bought a new clamp and then lock-wired the clamp bolt just in case lol.
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Jayden_F87900.00 |
12-20-2019, 08:23 AM | #15 |
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My car was fairly new and only about 18K miles on it so for the life of me I don't know what you would get out of new clamps. Mine were as about as new as you could get. Maybe a little loc tight on it might be a good deal on the V Band clamp...
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MODS: BM3 Stage 2/93 Octane OTS, Active Autowerke BMW F Chassis Intercooler, VSRF Catless Down Pipe, GFB DV+, Injen Evolution Intake, Red Line MTL for Transmission, NGK SILZKBR8D8S gapped at .24", Dinan Shockware, Cooper ZEON RS3-G1's and Hawk HPS 5.0 Brake Pads all the way around. |
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