Weird Noise at Idle 1991 R32 GTR/RB26DETT

[WhiteR32GTR]

Weird Noise at Idle 1991 R32 GTR/RB26DETT

Hi guys very new to these boards as well as to the RB26. I'm located Inn Las Vegas and just imported a 1991 R32 GTR. I've noticed a slight noise coming from the engine at idle(like a woomp woomp woomp). Sounds like bad bearings or something of that sort.The sound is present without the A/C on but not as loud. When I turn on the A/C it gets a little louder.Was curious if anyone could help me pin point the reason I'm hearing this noise and if I should worry? As I drive the car it doesn't get louder so I'm not sure if it's mechanical issue. I posted a link below to a video clip I took. Thank you in advance!

YouTube Video of the Noise

Edited May 26, 2017 by WhiteR32GTR

[tridentt150v]

Could be a few things.

Simple things:

Try checking your belts, also leave your A/C belt off and see if the noise changes.  Torn/worn belt, A/C or alternator bearings, idler wheel bearing [the one right down the bottom].

Harder:

Check your timing belt, HB, idler and tension wheel, cam pulleys, water pump.

Otherwise its probably something more sinister.