Hmm Rattling noise from engine under load - Page 2

**cantfind1** · 01-09-2010, 06:56 PM

mmmmmm sounds to me like vanos then. By any means I wouldn t be driving it!

Have a look, open bonnet leave engine running and then gently rev the car, if you have someone to help you, you can listen while they rev. If its the vanos it will be obvious and be rattling from the unit.

It is common in these vanos units for the bolts holding the cams to the vanos unit becoming loose, hense cams rattle in the housing.

I would not be driving it and if you have to no going above 3000rpm!!

**DazBlackCSL** · 01-09-2010, 07:52 PM

Doesn't misfire on initial acceleration ony on load , but rattles low down on and off and more as speed is constant on slight acceleration

**AlexGTT** · 01-09-2010, 07:56 PM

Headgasket will give a misfire of some sort. Does sound like vanos mate. Take it easy.

Can you find another dealer to diagnose mate? That's mental waiting to 17th.

Will Fields · 01-09-2010, 09:56 PM

Sounds like HG to me........slight rattle under load...my guess blown between no5 and no6 cylinders.
Any indy should be able to compression test it??????

**glendog74** · 01-09-2010, 10:35 PM

Not good dude!

I had an exhaust catalyst fail on a Honda Civic years ago and that rattled like a bastard when it went.

setra · 02-09-2010, 07:47 AM

This sounds like the problems i had when my Vanos solenoid kicked the bucket.. The car drove just fine while cruising, but when i pushed the gas pedal in it got some hick ups at about 2700-2900rpm together with some missfire problems. Didn't have the rattling noise though.. Hope things work out!

NZ_M3 · 02-09-2010, 02:41 PM

Screw driver test to find the source of the rattle.

DuncanR · 02-09-2010, 03:46 PM

Quote:

Originally Posted by NZ_M3

Screw driver test to find the source of the rattle.

Yeah Daz ! ..stick screwdriver in your ear ... if painful..turn it around so handle is to lughole...position screwdriver blade onto running engine... beware ! do not try and test the rotating fan blades in this manner !!

Bounce · 02-09-2010, 03:52 PM

Quote:

Originally Posted by DuncanR

Yeah Daz ! ..stick screwdriver in your ear ... if painful..turn it around so handle is to lughole...position screwdriver blade onto running engine... beware ! do not try and test the rotating fan blades in this manner !!

**DazBlackCSL** · 02-09-2010, 04:09 PM

What about a deck chair up my nose ?
Or
Fly a jumbo jet ?

01-09-2010, 07:52 PM	#12
DazBlackCSL CSL Register Uber-poster! Join Date: Apr 2008 Location: Shaboogling Posts: 7,199 Casino cash: $28478	Doesn't misfire on initial acceleration ony on load , but rattles low down on and off and more as speed is constant on slight acceleration __________________ CSL Register Lifestyle Coach and Social Secretary

01-09-2010, 07:56 PM	#13
AlexGTT CSL Register Uber-poster! Join Date: Apr 2008 Location: Herefordshire Posts: 4,374 Casino cash: $8572	Headgasket will give a misfire of some sort. Does sound like vanos mate. Take it easy. Can you find another dealer to diagnose mate? That's mental waiting to 17th. __________________ CSL Register Alcoholics Anonymous Group Leader & Businessman of the Year '93! www.earleyengineering.com

01-09-2010, 10:35 PM	#15
glendog74 CSL Register Uber-poster! Tetris Champion! Join Date: Apr 2008 Location: Cornwall Posts: 8,861 Casino cash: $32299	Not good dude! I had an exhaust catalyst fail on a Honda Civic years ago and that rattled like a bastard when it went. __________________ Cha'mone Mother F**ker!

02-09-2010, 04:09 PM	#20
DazBlackCSL CSL Register Uber-poster! Join Date: Apr 2008 Location: Shaboogling Posts: 7,199 Casino cash: $28478	What about a deck chair up my nose ? Or Fly a jumbo jet ? __________________ CSL Register Lifestyle Coach and Social Secretary

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01-09-2010, 06:56 PM	#11
cantfind1 S5, Sport Off, DSC M-track Join Date: Oct 2009 Location: Sydney Australia Posts: 675 Casino cash: $6490	mmmmmm sounds to me like vanos then. By any means I wouldn t be driving it! Have a look, open bonnet leave engine running and then gently rev the car, if you have someone to help you, you can listen while they rev. If its the vanos it will be obvious and be rattling from the unit. It is common in these vanos units for the bolts holding the cams to the vanos unit becoming loose, hense cams rattle in the housing. I would not be driving it and if you have to no going above 3000rpm!!

01-09-2010, 09:56 PM	#14
Will Fields S2 - Picking it up Join Date: Oct 2009 Posts: 37 Casino cash: $893	Sounds like HG to me........slight rattle under load...my guess blown between no5 and no6 cylinders. Any indy should be able to compression test it??????

02-09-2010, 07:47 AM	#16
setra S4 - Getting the hang of it Join Date: Jan 2009 Posts: 129 Casino cash: $3885	This sounds like the problems i had when my Vanos solenoid kicked the bucket.. The car drove just fine while cruising, but when i pushed the gas pedal in it got some hick ups at about 2700-2900rpm together with some missfire problems. Didn't have the rattling noise though.. Hope things work out!

02-09-2010, 02:41 PM	#17
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	Screw driver test to find the source of the rattle.