Hissing/ticking sound under load

[NyX_Nick]

Hey all, I installed my nrw exhaust today which consists of:

Gruppe-S UEL
Tanabe Overpipe
Invidia Resonated Front Pipe
GReddy Supreme SP catback

With OFT V4.03 Stage 2+ Tune.

I noticed when under load, I can hear a hissing/ticking that sounds like it's coming from under the car.

It gets quieter over time as the car heats up which leads me to believe it's an exhaust leak, but I can't hear it at idle, or startup/ turn off, and there's also no hesitation or lack of acceleration, the power is all there.

Does it sound like an exhaust leak? I also installed an AVO Panel Filter and had to fight it a bit to get it in as it was quite snug. Could it be coming from that?

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[Ultramaroon]

Doesn't sound like anything until we hear a recording. :/

Exhaust-port leaks do tick. That's a strong sign.

Thin headers hiss, or maybe more whoosh at high flow. That's likely normal.

[NyX_Nick]

Originally Posted by Ultramaroon

Doesn't sound like anything until we hear a recording. :/

Exhaust-port leaks do tick. That's a strong sign.

Thin headers hiss, or maybe more whoosh at high flow. That's likely normal.

I'll get a sound recording/video once I get off of work today

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[cjd]

Logs should show you if you have an exhaust leak.


Thin headers and the DI system could easily be what you hear.

[jonboy99]

I get a hissy kind of sound with my OFT headers. I haven't checked for a leak, but I suspect it's just the sound they make.

[Weigaldo]

I have an "air escaping" noise that I can only hear under light throttle/low rpm when there is something next to me for the sound to bounce off of. Sounds like it's coming from under the passenger side of the car. I went under the car probably 5-6 times to check for leaks before I accepted that's just how my setup sounds. The only other thing I could think of is movement at the front/mid pipe connection where the donut loses its seal. But if it's sealing at idle, I'm not concerned about that.

[NyX_Nick]

Took this quick video of it after work today on my phone, fresh off a cold. You can hear it when the gas is pressed

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[Breadman]

im not hearing it. if its ticking it could be an exhaust leak or injectors

[NyX_Nick]

Originally Posted by Breadman

im not hearing it. if its ticking it could be an exhaust leak or injectors

On a cold-start, especially in the morning, I hear a tick when on-throttle, just momentary when the gas peddle is pressed in then it goes away.

I believe it may be the gaskets where the header meets the head not sealing properly, as it goes away as the car heats up, and if I drive it for more than 20-30 mins, goes away completely.

I remember having these symptoms on my MR2 before replacing the manifold gasket.

Either way, I'm sending my car out on Friday to have the coilovers installed/aligned at a Subaru/Porsche specialist shop here, and I when I mentioned it to them, they said they'd take a look at it, and the connections/welds and see if they can find the leak