Low rev rattle

HancoB · Post by **HancoB** » Thu Feb 21, 2008 11:07 am

Hi guys I am new here and just got my car a week and one day ago!!!! I am like a 13 year old who got his first kiss from a porn star,he he! I love the car to bits and I barely had it for 3 days before I fitted a BOV and filter. But and a big BUT like those you find on J LO, since I bought the car there was a strange rattle between 2000 and 3000 rpms. It disappears as soon as the boost kicks in and then runs up smoothly through the rev range. I know it might be something small for other people but i'm a perfectionist and I want my car to run Smooooooth.

Plz guys let me know if you can help.

Daniel · Post by **Daniel** » Thu Feb 21, 2008 11:13 am

Oh no!

what kind of rattle? I really hope for your sake its not bearing knock! that shows its ugly head between 2-3k rpm

Welcome to the forums

rat · Post by **rat** » Thu Feb 21, 2008 11:21 am

can you tell where it is coming from

HancoB · Post by **HancoB** » Thu Feb 21, 2008 11:21 am

No its not ping, It sounds like something is loose. The guy I bought the car from put a new motor in on 115 000km and the car is now on 186 000, The car is totaly stock besides my BOV an Filter...but it was there before I did the mods.

I know for a fact that it is not ping coz you would get brown smoke out the back. It sort of reminds me of my mom driving the VW kombi up a hill in a wrong gear...he he woman drivers...but the problem is that you get is in 2nd to 4th gear only in city driving.

HancoB · Post by **HancoB** » Thu Feb 21, 2008 11:23 am

From the motor, high up sort of tappet cover or valve hight

Gary57 · Post by **Gary57** » Thu Feb 21, 2008 11:24 am

I really hope for your sake its not bearing knock!

I know for a fact that it is not ping coz you would get brown smoke out the back

A ping would nessesarily cause brown smoke and deffinately not enough that you would see it. Where abouts on the motor is the noise coming from??

CHAREL · Post by **CHAREL** » Thu Feb 21, 2008 11:27 am

Welcome bro!
Its not to say, that there will be smoke if it is a knock, or ping....
Does the noise stay there if you keep the RPM constand at that Range?
Check the exaust, boost pipes, cables and anything that might be close to the body work, and make sure the dont toutch, and if they touch, that there is no play.
Just me 2c's!!!

CHAREL · Post by **CHAREL** » Thu Feb 21, 2008 11:30 am

O' sorry, something just came to me..........
Check your oil leavel, I know from experiance, that if the oil is just a bit low, it makes that noise, if the oil is full, maby you must try a thicker oil, as long as it is senthetic exc: EDGE, MAGNATECK.
Let me know if you still dont come right!

HancoB · Post by **HancoB** » Thu Feb 21, 2008 11:54 am

Jip have checked everything nothing is close to touching the body. and yes if I keep it in that rev range it stays there.

Daniel · Post by **Daniel** » Thu Feb 21, 2008 12:00 pm

Where you located? Maby one of us could come and have a listen

Charlvdw · Post by **Charlvdw** » Thu Feb 21, 2008 12:03 pm

Good idea 4 is better than 2 ears.

HancoB · Post by **HancoB** » Thu Feb 21, 2008 12:04 pm

In Bellville, Im a CT boy...

Daniel · Post by **Daniel** » Thu Feb 21, 2008 12:07 pm

hmm bugger...

question, If you hold the rpm at say 2800-3k rpm and then release the accelerator, does the rattle get alittle louder?

HancoB · Post by **HancoB** » Thu Feb 21, 2008 12:11 pm

No it stays the same from 2000 to 3000 then I start hearing the turbo spooling up, leave the throttle->waste gate goes like a mad pigeon->rattle disappears

mario_200sx · Post by **mario_200sx** » Thu Feb 21, 2008 12:12 pm

hey riekert, anothe CT outjie,

Welcome dude!

Bring your car ova 2 my place or take it to Anton Slabbert, he wouldnt mind havin a listen. And he knows 200sx from top to bottom!