Rb20 Wizards, Help!

[dmr]

i've noticed this low tone knocking sound coming from my engine bay lately. a few friends identified it as my power steering pump but i'm not too sure on that. i thought i might have fkd a bottom end bearing but it doesn't sound too much like it.

characteristics:

only happens when it's really hot, or after a long drive

as the car cools down the sound fades away

i can only hear it on idle

it doesn't get louder as i rev

here's a crap quality short vid of it: http://youtube.com/watch?v=x8MkEz9VD9M

(the sound was a bit louder a couple minutes before i shot that vid)

Edited November 16, 2007 by dmr

[Nathan_G1]

oil could be too thin and causing the problem.......

but could be your bottom end bearing

[dmr]

well i've never had a problem with the motul turbolight that i've been using for over a year. this problem only started about a month ago.

Edited November 16, 2007 by dmr

[dmr]

also i hear that when it's bottom end bearing related, the knocking sound will get louder as the revs go higher because of more stress on the fkd bearing. it doesn't do this in my case..

[dmr]

anyone else? cmon.. where's people like GTST and Roy when you need them?!

Edited November 16, 2007 by dmr

[dmr]

...

[burnsie]

ive had that happen as well but only twice

[dmr]

ive had that happen as well but only twice

and what was the outcome?

[Godzilla32]

A bearing knock is generally only there on startup before it gets sufficent oil pressure to fill the larger clearance. So you can pretty safely cross that off your list...which is a good thing. What you need to do is buy an automotive stethescope and you can then isollate the noise to where its actually coming from. They arent expensive and thats what we use at work to pin point all noises that are hard to find. Good tool shops will sell them. I know BSC sell them cheap too. About 30 bucks i think.

Good luck

Deren

[dmr]

A bearing knock is generally only there on startup before it gets sufficent oil pressure to fill the larger clearance. So you can pretty safely cross that off your list...which is a good thing. What you need to do is buy an automotive stethescope and you can then isollate the noise to where its actually coming from. They arent expensive and thats what we use at work to pin point all noises that are hard to find. Good tool shops will sell them. I know BSC sell them cheap too. About 30 bucks i think.

Good luck

Deren

Thanks Deren, i'll look into that as of tomorrow.

[GeeTR]

The old "long jimmy driver to the ear" trick works well i think, till you find a proper stethoscope / knock cans

Edited November 19, 2007 by GeeTR