Sounds like a heat shield wrattle

akavintz · Post by **akavintz** » 13 Jan 2020, 18:52

Hi All,

Can anyone help me.

I have a Citroen Relay 2.2 09. Its started making an intermittent noise sound like a wrattling heat shield only it happens after I turn off the engine.

Becasue of this I am thinking it is something electrically operated and initially thought EGR but the EGR appear to be vacume operated only so short of settling as the vacume dissipaits I dont think it is that.

This sounds like a valve is being operated but it sounds very dry, tight!

Can anyone help me identify items that will operate after the engine is off?

Thanks

Vince

Post by **GiveMeABreak** » 13 Jan 2020, 20:31

EGR valves often have a 'cleaning cycle' to prevent sticking. Although they operate with a vacuum, they are generally electrovalves. When you switch the ignition off, you may hear a whirring noise and that can be the EGR flaps moving, but it's not a rattling sound.

It may be the vibration of the engine stopping that is making a loose heat shield rattle.

akavintz · Post by **akavintz** » 13 Jan 2020, 20:47

Yeah no the engine has stopped by this time and I have time to climb out and walk around to the front to hear this noise.

It sounds like it is coming from the front of the engine and I think the EGR is at the back by the baulhead.

It does sound like something is being operated that is woefully under lubricated.

French Car Forum

Sounds like a heat shield wrattle

Sounds like a heat shield wrattle

Re: Sounds like a heat shield wrattle

Re: Sounds like a heat shield wrattle