washing machine rattling sound on WOT - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

alchemis · 07-09-2017, 01:22 PM

my car had been heavily used most of the time.
either mountain pass drives or circuit drives. pretty much like a track car.

just after one of the track day i have a weird rattling sound on WOT.

i've searched around and it's not the same like others having.

mine happen on all gears 3k rpm to 4k.

like a rock trapped in an empty washing machine. non rhythmic rattle.
i tot it was clutch issue. but why only 3k to 4k. doesn't feel any jerk at all. no CEL. no lack of power, power still strong.

initialy tot i killed the clutch. but then there's no slippage, and only 3k to 4k.
neutral doesn't give the noise either.

any idea ?

humfrz · 07-09-2017, 02:36 PM

Your washing machine is out of balance.

Open the lid, redistribute the clothes and close the lid.

humfrz

JD001 · 07-09-2017, 05:06 PM

Quote:

Originally Posted by humfrz

Your washing machine is out of balance.

Open the lid, redistribute the clothes and close the lid.

humfrz

You could be right, it seems like that when it goes into its spin cycle over 4000rpm it gets quieter. The counter weights may have worked free.

RJasonKlein · 07-09-2017, 06:26 PM

Did you go off the circuit on the day you were at the track and the noise began? If so, could you have a stone or stones trapped in the aerodynamic underbody panels making a harmonic rattling between 3-4,000 rpms?

guybo · 07-09-2017, 06:32 PM

So WOT only, not at part throttle? Rocks in the body would be a best case, but I don't think that would be very loud.

what mods?

steve99 · 07-09-2017, 07:37 PM

metallic rattle under high load, could possibly be detonation/knock

log engine parameters and see if your getting knock correction
have you changed fuels lately, maybe its lower quality

alchemis · 07-09-2017, 09:13 PM

That's a good joke on the washing machine...
I didn't went off circuit.
Mods were bolt on like header intake ecu manifold spacer.
If it's detonation, why it's not anything more than 4000rpm just wondering.
As for gas, this tank is a mix. Coz when I head to the circuit I have half tank on other brand. Got no choice but to fill with other brand prior entering circuit.

Because my car is almost race spec with high spring rate. I tot bouncing around the car on normal roads and uneven roads could make the stone come out. But it's still there... uneven roads can't even replicate the sound.

Does detonation only happen at 3k or 4k ? I thought detonation generally happen at high rpm?

Scrappydoo · 07-09-2017, 09:13 PM

wots a tot?

alchemis · 07-09-2017, 09:13 PM

Yes it's not part throttle. Only wot

cjd · 07-09-2017, 09:31 PM

Quote:

Originally Posted by alchemis

Does detonation only happen at 3k or 4k ? I thought detonation generally happen at high rpm?

I only had knock in that range till I fixed the tune (nameless header) - so I'd say yeah, it doesn't have to be at the top of the range. Logging is the sure way to know.

RJasonKlein · 07-09-2017, 10:22 PM

Have you checked the header for cracks?

alchemis · 07-09-2017, 10:32 PM

I guess it's time to slap on the car to the dyno.

alchemis · 07-11-2017, 06:33 AM

diagnose result came out.... the mechanic says there's some mini explosion sound happening under the intake manifold. like a mini explosion sound around that area.

i'm guessing it's direct injection seal.
any ideas ??

bababooey · 07-11-2017, 10:25 AM

Quote:

Originally Posted by Scrappydoo

wots a tot?

= typically on throttle?

07-09-2017, 01:22 PM	#1
alchemis Member Join Date: Nov 2015 Drives: JDM Toyota 86 GT limited Location: Malaysia Posts: 21 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	washing machine rattling sound on WOT my car had been heavily used most of the time. either mountain pass drives or circuit drives. pretty much like a track car. just after one of the track day i have a weird rattling sound on WOT. i've searched around and it's not the same like others having. mine happen on all gears 3k rpm to 4k. like a rock trapped in an empty washing machine. non rhythmic rattle. i tot it was clutch issue. but why only 3k to 4k. doesn't feel any jerk at all. no CEL. no lack of power, power still strong. initialy tot i killed the clutch. but then there's no slippage, and only 3k to 4k. neutral doesn't give the noise either. any idea ?

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07-09-2017, 02:36 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,407 Thanks: 29,790 Thanked 32,807 Times in 16,828 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	Your washing machine is out of balance. Open the lid, redistribute the clothes and close the lid. humfrz

07-09-2017, 06:26 PM	#4
RJasonKlein Senior Member Join Date: Jul 2014 Drives: 2013 Scion FR-S 10 Series Location: Clarendon Hills, IL Posts: 617 Thanks: 442 Thanked 356 Times in 202 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Did you go off the circuit on the day you were at the track and the noise began? If so, could you have a stone or stones trapped in the aerodynamic underbody panels making a harmonic rattling between 3-4,000 rpms?

07-09-2017, 06:32 PM	#5
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	So WOT only, not at part throttle? Rocks in the body would be a best case, but I don't think that would be very loud. what mods?

07-09-2017, 07:37 PM	#6
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,996 Thanks: 1,035 Thanked 4,992 Times in 2,983 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	metallic rattle under high load, could possibly be detonation/knock log engine parameters and see if your getting knock correction have you changed fuels lately, maybe its lower quality

07-09-2017, 09:13 PM	#7
alchemis Member Join Date: Nov 2015 Drives: JDM Toyota 86 GT limited Location: Malaysia Posts: 21 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	That's a good joke on the washing machine... I didn't went off circuit. Mods were bolt on like header intake ecu manifold spacer. If it's detonation, why it's not anything more than 4000rpm just wondering. As for gas, this tank is a mix. Coz when I head to the circuit I have half tank on other brand. Got no choice but to fill with other brand prior entering circuit. Because my car is almost race spec with high spring rate. I tot bouncing around the car on normal roads and uneven roads could make the stone come out. But it's still there... uneven roads can't even replicate the sound. Does detonation only happen at 3k or 4k ? I thought detonation generally happen at high rpm?

07-09-2017, 09:13 PM	#8
Scrappydoo Senior Member Join Date: Oct 2016 Drives: Grrrr Location: The Motherland (not France) Posts: 599 Thanks: 330 Thanked 378 Times in 231 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	wots a tot?

07-09-2017, 10:22 PM	#11
RJasonKlein Senior Member Join Date: Jul 2014 Drives: 2013 Scion FR-S 10 Series Location: Clarendon Hills, IL Posts: 617 Thanks: 442 Thanked 356 Times in 202 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Have you checked the header for cracks?

07-09-2017, 10:32 PM	#12
alchemis Member Join Date: Nov 2015 Drives: JDM Toyota 86 GT limited Location: Malaysia Posts: 21 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I guess it's time to slap on the car to the dyno.

07-11-2017, 06:33 AM	#13
alchemis Member Join Date: Nov 2015 Drives: JDM Toyota 86 GT limited Location: Malaysia Posts: 21 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	diagnose result came out.... the mechanic says there's some mini explosion sound happening under the intake manifold. like a mini explosion sound around that area. i'm guessing it's direct injection seal. any ideas ??

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