MINI2

Dec 6th, 2006, 12:35 PM

I have a 2003 Cooper S with the 210bhp JCW kit.

Under heavy acceleration, pedal to the floor, I sometimes hear what sounds like water on hot metal; what I call "Steam" sound, from the back of the car

This happens at 5,000 rpm and get louder the higher the rpm.

Has anybody experienced this before?

ButtonIt · Dec 6th, 2006, 12:38 PM

Are you sure it's not the sound of the supercharger whining?

There's a valve that opens in the JCW air filter to allow more air to be sucked in, this flap opens at 4500 revs and is very noticeable in engine sound.

Dec 6th, 2006, 12:47 PM

nope; it's not the flap @ 4,500 rpm.

this sound is very distintive and literally sounds like water on hot metal and is definetly comming from the back of the car.

Richard Crofts · Dec 6th, 2006, 12:54 PM

Windows open or closed?

Is it under only heavy acceleration or is it also there if your gentle and just run it at the rpm level your hearing it at?

Dec 6th, 2006, 12:57 PM

windows closed.

the sound only come under heavy acceleration; with the pedal to the floor. if i lift the pedal the sound goes away

Razzputin · Dec 6th, 2006, 01:02 PM

Quote: Originally Posted by JeffreyM (original)

I have a 2003 Cooper S with the 210bhp JCW kit.

Under heavy acceleration, pedal to the floor, I sometimes hear what sounds like water on hot metal; what I call "Steam" sound, from the back of the car

This happens at 5,000 rpm and get louder the higher the rpm.

Has anybody experienced this before?

that's excess plasma venting from the warp drive. :-)

MINIMANIAUK · Dec 6th, 2006, 01:31 PM

If you have the JCW exhaust,they are prone to the baffles in the exhaust boxes falling out and rattling around it could be that which you are hearing-so much for JCW quality

rev the engine and listen to the rear boxes,or try wiggling them when cold and listen for a rattle

minioneandrew · Dec 7th, 2006, 12:02 PM

Doubt this is it but when you burn petrol, water is formed- quite a lot actually....could it actually be water in contact with the hot exhaust?

Dec 6th, 2006, 12:35 PM	#1
JeffreyM Posts: n/a	"Steam" sound from exhaust area I have a 2003 Cooper S with the 210bhp JCW kit. Under heavy acceleration, pedal to the floor, I sometimes hear what sounds like water on hot metal; what I call "Steam" sound, from the back of the car This happens at 5,000 rpm and get louder the higher the rpm. Has anybody experienced this before?
http://www.mini2.com/forum/

Dec 6th, 2006, 01:02 PM	#6 (permalink)
Razzputin MINI2 Regular Join Date: Jul 2006 Local Time: 09:23 PM Posts: 103 Offline	Sure have... Quote: Originally Posted by JeffreyM (original) I have a 2003 Cooper S with the 210bhp JCW kit. Under heavy acceleration, pedal to the floor, I sometimes hear what sounds like water on hot metal; what I call "Steam" sound, from the back of the car This happens at 5,000 rpm and get louder the higher the rpm. Has anybody experienced this before? that's excess plasma venting from the warp drive. :-)

Dec 6th, 2006, 01:31 PM	#7 (permalink)
MINIMANIAUK MINI2 Sponsor Join Date: Mar 2006 Local Time: 10:23 PM Posts: 1,065 Offline	If you have the JCW exhaust,they are prone to the baffles in the exhaust boxes falling out and rattling around it could be that which you are hearing-so much for JCW quality rev the engine and listen to the rear boxes,or try wiggling them when cold and listen for a rattle www.minimaniauk.com

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Dec 6th, 2006, 12:38 PM	#2 (permalink)
ButtonIt The Disorganiser My Classifieds Join Date: Jul 2003 Location: Waiting for others Local Time: 10:23 PM Posts: 15,546 Offline	Are you sure it's not the sound of the supercharger whining? There's a valve that opens in the JCW air filter to allow more air to be sucked in, this flap opens at 4500 revs and is very noticeable in engine sound.

Dec 6th, 2006, 12:47 PM	#3 (permalink)
JeffreyM Posts: n/a	nope; it's not the flap @ 4,500 rpm. this sound is very distintive and literally sounds like water on hot metal and is definetly comming from the back of the car.

Dec 6th, 2006, 12:54 PM	#4 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 10:23 PM Posts: 3,174 Offline	Windows open or closed? Is it under only heavy acceleration or is it also there if your gentle and just run it at the rpm level your hearing it at?

Dec 6th, 2006, 12:57 PM	#5 (permalink)
JeffreyM Posts: n/a	windows closed. the sound only come under heavy acceleration; with the pedal to the floor. if i lift the pedal the sound goes away

Dec 7th, 2006, 12:02 PM	#8 (permalink)
minioneandrew MINI2 Regular My Classifieds Join Date: Sep 2006 Location: Ayrshire Local Time: 10:23 PM Posts: 331 Offline	Doubt this is it but when you burn petrol, water is formed- quite a lot actually....could it actually be water in contact with the hot exhaust?

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