i'm getting a rattle/knock sound coming from under the hood

gotboost81 · Apr 2, 2005

i'm getting a rattle/knock sound coming from under the hood while accelerating.car has no sound at idle,but when i accelerate at around 3krpm i hear it.i check under the hood and it sounds like its coming from the motor.the car still runs strong but???

RNN14GTI-R · Apr 3, 2005

Does it sound like a valve tapping?

local 701 · Apr 3, 2005

It could be that a balance shaft bearing has found a new home in your oil pan. Once the bearing has spun out, the balance shaft will bounce around and make knocking noises at higher rpm levels. It's almost undetectable at idle.

gotboost81 · Apr 3, 2005

hey local 701,if it is a balance shaft bearing how hard of a fix is it? thanks

local 701 · Apr 4, 2005

If the problem is the balance shaft bearing, the intake side is the cause. You will have to install a balance shaft eliminator kit to fix the problem.

Also, once the engine revs above 3k, it sounds like someone sticking a baseball card into a house fan set on high. You will also hear a slight knock as the balance shaft hits the side of the block.

Note: Drain your oil and check for golden metal particles, this is a good sign of the spun bearing.

gotboost81 · Apr 4, 2005

do you also think it can be a rod bearing?and do you know some signs of it being a rod bearing i.e loss of power,diff sounds.i hope its not a rod bearing.

thanks

GunnaGetOne · Apr 4, 2005

there are a ton of things it could be. its hard to diagnose on a computer.

i'm getting a rattle/knock sound coming from under the hood

gotboost81

RNN14GTI-R

local 701

gotboost81

local 701

gotboost81

GunnaGetOne

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