Engine knock????

[padrickz88]

Hi people, need some advice on what people think this might be..

WELL last night I went for a drive, about 60km and 50km of that was freeway, nice easy driving.... 3000rpm changes max....
Park out the front of my mates place and turned the car off for about 5-10 minutes then when I went to re start it, I had a knocking noise in the engine (as soon as it turned over the noise started) SO I turned it off and started it a couple hours later to go home and was even worse and pretty damn loud then as I was about to drive away the oil pressure light came on for not even a second then the light turned off, and stayed off.

So I started driving home and when revving over about 1500 the knock was pretty much non existant....
Car drove exactly the same as it usually does, no lack of performance just a hard knocking noise when below about 1500-1750 rpm

It was idling fine, just loud.....


So does anyone have any idea what the problem could be? Got me stumped, usually I read threads about it getting louder with revs, not disapearing :S

Thats my story, any help and suggestions would be appreciated

[strgas]

When did you last change your oil and filter and what grade of oil are you running ....

[padrickz88]

Changed oil and filter about 5,000k's ago and currently using a 15-40....

[strgas]

i would check your oil pressure with a gauge to confirm what pressure it has , it could be a lifter problem or maybe a oil pressure relief valve stuck open to a worn bearing start with the basic's , maybe even spin on a new filter ...

[chief18]

Yeah as strgas said, check your oil pressure with a 'master' guage, if it was lifters it would get louder with engine rev's. The oil light coming on for a second could indicate a slight blockage, how often do you replace oil/filter and whats your driving style? Long trips only, short trips? bit of both? start/stopping?

[padrickz88]

Sweet ill give it a look, will give me something to do tomorrow........

The car usually drives a bit of everything, so yeah........ The thing is its not a tick its actually a knock/clunking noise and goes away any revs over 1500.....
Thats what has me confused because if it was a blockage wouldn't it always do that no matter what rpm? (guessing)

[mike49]

that sounded exactly like what happened to my VR, was big end bearing

[padrickz88]

WELL! thank god it was nothing bearing or oil related...... was just a stuffed harmonic balancer (the inner part seperated from the outer section)

But i think i might do an oil flush next service just incase

Thanks for the help