Strange Rattle sound when Car cold.

[Chris S 1245]

Hi as title suggests anyone experiencing this on their Rs3 ? Can hear a rattle sound don’t know if it’s from engine or exhaust when cars cold and in S at idle . Switching to D seems to make it disappear . Any ideas on what this could be ?

 

[Rommies]

wastegate rattle from the turbo


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[8YARWY]

Hi as title suggests anyone experiencing this on their Rs3 ? Can hear a rattle sound don’t know if it’s from engine or exhaust when cars cold and in S at idle . Switching to D seems to make it disappear . Any ideas on what this could be ?

After the 30 secs Catalyst warm up phase ?

 

[Chris S 1245]

After the 30 secs Catalyst warm up phase ?

Yes when cars up to temperature can’t really hear it anymore .

 

[8YARWY]

Yes when cars up to temperature can’t really hear it anymore .

Generally only hear the wastegate rattle low down in the 1500-2500 range and more on decatted/mapped cars.


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[Chris S 1245]

Generally only hear the wastegate rattle low down in the 1500-2500 range and more on decatted/mapped cars.


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Ah right mines standard nothing done to it . Only noticed it recently

 

[Rommies]

Here is a video on my youtube channel from a friends audi rs3 8v2..does it sound something like this?

Audi RS3 8V2 Wastegate Rattle



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[Chris S 1245]

Here is a video on my youtube channel from a friends audi rs3 8v2..does it sound something like this?

Audi RS3 8V2 Wastegate Rattle



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Hard to tell mate like I said it’s when the Car is in S at idle on a cold start once up to temperature it’s not there anymore . I’ve only just noticed it recently so unsure if any others have experienced it . I will try to get a video up of it .

 

[Rommies]

Hard to tell mate like I said it’s when the Car is in S at idle on a cold start once up to temperature it’s not there anymore . I’ve only just noticed it recently so unsure if any others have experienced it . I will try to get a video up of it .

Perhaps make a video...I'm quite interested to find the cause

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[Paulbean]

Mine rattles on cold start until you switch drive mode, not sure if that is coincidental with the cat warmup cycle or not.

I'm used to strange mechanical noises at cold start having come from a slapper of a scooby

 

[Chris S 1245]

Perhaps make a video...I'm quite interested to find the cause

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Well it seems like it’s gone and fixed itself . Thankfully .