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Old 01-17-2021, 12:25 PM   #1
Scooby Newbie
Member#: 398798
Join Date: Aug 2014
Chapter/Region: South East
Location: Grovetown
2012 STi Hatchback
It's starting to itch...

Default Need help with this noise, losing my mind

So I've got less than 600 miles on my brand new IAG Stage 2 Tuff Block. And Ive had this noise since almost the beginning. I haven't found a thread or video anywhere that sounds exactly like my issue, so here goes. Tuner is kind of stumped, has suggested a few things, but nothing has changed it.

Less than 600 miles on IAG Stage 2 Tuff Block
New Parts with motor build
OEM oil pump
OEM thermostat
OEM idlers and timing tensioner
Kelford 264 cams
GSC Valve Springs
Koyo Rad
Gates Blue Racing timing belt
FP Green turbo
Exedy STage 1 HD clutch kit
ARP Headstuds
IAG Oil Pick up tube
Group N Motor mounts
All new exhaust gaskets

Reused from old motor:
Tomei ELH
Invidia Catted DP
ID 1050x injectors
Crawford AOS
Cobb CAI
Perrin Fuel rails and regulator
OEM fly wheel (resurfaced)

The noise/rattle only happens after driving enough to get everything warm. Will not happen with cold motor. I've tried numerous times but can only get it to happen after a good warm up and 15 mins or so of driving. The sound only happens when accelerating from a stop, 1st gear only and going up hill, so with a little bit of load I guess. And the noise only happens between 1500-2100 rpms or so and then goes away. If I accelerate from a stop on flat or downhill I don't hear it. The noise does not cause any noticeable vibration in floor, pedals, shifter or steering wheel. Oil pressure at cold idle, warm idle and cruising is within spec. And no oil pressure drop when noise occurs. Originally thought it was timing tensioner, replaced with another OEM tensioner, with no luck. Still on Motul Breakin 10w40 oil per IAG guidelines. I've also checked for anything loose in the engine bay, got under there and shook thee hell out of everything even smacked on some stuff with a dead blow and couldn't replicate the sound. Open to any suggestions.

Need help before I scrap this $10k motor build and sell the car for scrap.

This camera view is from the passenger side mounted to the uni body frame right next to the valve cover/header. Timestamps for the noise so you aren't listening to the entire thing.

15:04, 15:59, 16:29, 16:39, 16:50, 17:00, 18:10, 21:20, 21:28, 21:38, 21:53, 23:53, 24:00, 24:08, 24:32, 24:47, 26:44, 31:16, 31:24, 31:33, 31:43, 31:58, 33:58, 34:07, 34:17, 34:27

Also took a video from the driver side in the exact same spot, but dont' have enough space in my googledrive for both videos. If someone wants to hear that one as well, let me know and I'll figure out a way to upload it somewhere.

TheDudesSTi is offline   Reply With Quote

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