yeh its resonance caused by the revs as you go down. it happens around the 3 --> 2k rev range.

had the same prob on ma my99 wrx started around the 3k area then it went on to constant

ended up being a BIG END and had to get new motor

get the guys at speedworks to take it for a drive and to check it up for ya play it safe

gl

let us know wat it was

Hey guys having a similar problem in my STOCK My99 WRX, thought i'd bump this thread as its relevant.

I AM getting quite a pronounced rattle when decelerating in the 2-3k rev range.
I have checked all heat shields that i am aware of, turbo exhaust shield, and pretty much all of the main exhaust shields, and they seem fine, quite stiff and not budging at all.

I really hope that this is not a big end bearing failure, as i am flat broke at the moment having not been able to work after getting stress fracture to the foot (doh!).

Is there anyone on the forums who could have a listen and tell me the bad news?

I'm hoping it is just the uppipe, cant seem to isolate the noise, as i can only hear it when driving, doesnt occur when revving out of gear even when up to 4k rpm.

cheers

What sort of rattle? high/low frequency. I had a 'creak' in my bugeye that was due to a missing bolt in an engine mount (motor was twisting itself slightly).

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MY08 Liberty Tuned by STI Wagon

its sort of like a crunchy rattling noise, i guess its fairly high frequency

I doubt its your engine if its only on deceleration and only during a small rpm range.

What clutch are you running? Some Exedy heavy duty clutches have been known to develop a rattle in the sprung center. If you have a light weight flywheel it can increase gear chatter on deceleration too.

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RS Liberty - Because WRX's are only good for parts...

I get the same rattle as well, it's been like that for nearly 6 months


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totally stock flywheel and clutch i presume, has only been serviced by subaru

i have a simular problem except i hear the rattling sound when i turn over the engine when the car is cold. also when i get around about 4000 rpm!

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BLUE 06 STI

i had that problem a year or so ago , but i don't want to curse anyone by saying big end .. so i wont , id get a compression test if you are worried and find out before you really fuck something. but i also get a quick rattle around the 3k mark still when its cold , ASG think it is the heads and said it didn't get shimmed properly when it was re built , not a problem dow.

but yer , get a compression test if you think its a big end and good luck

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may the forced induction be with you