Sounds like a heat shield wrattle

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akavintz
Posts: 15
Joined: 13 Jan 2020, 19:34

Sounds like a heat shield wrattle

Post by akavintz »

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
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GiveMeABreak
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Re: Sounds like a heat shield wrattle

Post by GiveMeABreak »

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
Posts: 15
Joined: 13 Jan 2020, 19:34

Re: Sounds like a heat shield wrattle

Post by akavintz »

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.