Sqni

Hi
Before 100km my car started making weird noises. At first I thought that its exhaust leak. But after 80km sound start amplify. I think that its coming from head. Can anyone help ? Next week I going to take my car to mechanic...
B18C4, swap, new sparkplugs, new dizzy
Video:
Https://drive.google.com/file/d/1huwHi-3L12B7UXQ-IllzegIHyMI8Qk_W/view

BrianRabbit

For one - it does sound like an exhaust leak. Maybe at the connection of the collector of the exhaust manifold and the catalytic converter? It could help if you could have someone rev it lightly to see how the sound intensifies with an increase in RPM. Your valves also sound like they need to be tuned up.

Glad you're someone that went to the length to actually post a video. The quality isn't the highest, but that's data transfer for you. Could you record a better video? Maybe on a different phone?

Should be an easy fix, if this community can't figure it out, once you get it on a rack a mechanic will pin point it and it might just need a little tack weld.

Sqni

Thanks for reply
Yes its maybe a exhaust leak. My exhaust Header is bad. Because is leaking from connection where its coming from 4to2 and from catalytic converter because of motor swap. I already bought new OBX Exhaust Header and VTI mount to fit new 2,5 header correctly... Yes video is bad quality because my main mobile broke and i have this poor one. I can record new quality video but maybe tomorrow or second day after this.
I think that sound is coming from connection between header and catalytic converter. But I can't go under car to check if that sound is coming from exhaust because my jack can fit under car because of freezed snow next to the car, lowered suspension and freezing temperatures outside. I already talk with my mechanic (via messenger) and he told me that it's probably exhaust leak (conclude from video). So maybe this or next week I going to bring car to him.
I just want to make sure that it's not something important because I don't want to damage my engine. I heard a lot of time exhaust leak but not that loudly. And from engine hood side its seems that it's coming from intake section. But under intake is that connection between header and cat.
I will post progress when I realize what it is.

NukeNinja

If the sound seems to be coming from the top of the head, check your spark plugs. A bad seat will allow an exhaust leak.

Sqni

Hi
Here is new video with same mobile but I set it to highest quality. From the video it seems that is exhaust leak. (YES THERE IS 100% EXHAUST LEAK but I just want to know if that SOUND is coming from there...) jacked up car to have better access to suspension and I think on 70% that its exhaust. But I can't go under car because I have too little space there. I have bad exhaust because of bigger exhaust manifold (VTI engine). I already bought new manifold and VTI mount to have perfectly sealed exhaust.
Thank for reply.
https://drive.google.com/file/d/1Vi8...ew?usp=sharing

Sqni

UPDATE
So the sound is coming also from the motor.
My mechanic started working on my car but he has another car to do so he just disassembles head on the motor. But he found nothing bad. Next days when he finishes another car they will disassemble down part of the motor (oil pan) and if he found nothing, he will pull out the head.
And they did a compression test and compression is low. Around 10.5bar (155psi) on ALL cylinders. So there is some problem what causing the low compression. I posted video upper if someone wants to hear it.
Do somebody have a similar problem or just guess what it can be?
Thanks