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Author Topic: Rattle at idle  (Read 6941 times)

Offline TheBALDpuma

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Rattle at idle
« on: October 20, 2019, 11:29:19 am »
I have a rattle at idle, the key points...

Usually does it from cold - hot, no change in the rattle
It rattled for a week or so a month ago and then went away
Sometimes I get a little higher frequency rattle at 1500rpm too
Sometimes it decides not to rattle (it's didn't for 50% of my journey this morning)

I'm going to try to add a video for you to listen too.  Obviously I'm worried about cam chain, also after out stopped rattling left time an injector failed but I'm hoping that was coincidental. I'm hoping it's a trim rattle in the dash. Please. Haha.



https://m.youtube.com/watch?v=B4l-cVh6cBE

« Last Edit: October 20, 2019, 11:33:13 am by TheBALDpuma »
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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #1 on: October 20, 2019, 12:51:41 pm »
ETA...

You can't hear it from outside the car

It sounds like it's coming from behind the dash/footwell on the drivers side
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Offline richtung

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Re: Rattle at idle
« Reply #2 on: October 20, 2019, 03:02:46 pm »
That's your fuel line rattling. I had the same issue last month after having work done my car. Turns out the fuel line wasn't clipped back into its retaining clip properly.
That fact the rattle stops when you press the throttle is the telltale sign.

Hope this helps

Rich
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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #3 on: October 21, 2019, 09:34:05 pm »
Where is the fuel line? Is this something I can check myself?

Would you not hear that if you were stood outside the car?
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Offline pudding

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Re: Rattle at idle
« Reply #4 on: October 22, 2019, 02:20:16 pm »
Yeah that does sound like fuel line tap.

You need to remove the plastic underbody panel on the driver's side to get at the fuel lines.  Where they come down from the engine bay and straighten out, wrap some foam around them.  I used a bit of grey pipe lagging from B&Q.
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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #5 on: October 22, 2019, 02:26:05 pm »
Quote from: Pudding on October 22, 2019, 02:20:16 pm
Yeah that does sound like fuel line tap.

You need to remove the plastic underbody panel on the driver's side to get at the fuel lines.  Where they come down from the engine bay and straighten out, wrap some foam around them.  I used a bit of grey pipe lagging from B&Q.

Okay thanks. I might have a go at this myself.

I'm not much of a mechanic but it sounds doable. 

If I don't get to it right away, and I going to wear a hole in my fuel line and blow up my car?

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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #6 on: October 22, 2019, 04:44:41 pm »
Well I got underneath it today, removed the cover, find the fuel. At the rear end where it comes out the frame it already has a custom made rubber holder. In the hole in the middle I could feel the vibration of the line, so I stuffed half a kitchen scrubber in the hole to see if it stopped the rattle and it did. Result! I've just left it in and bolted the underside panel back together. If the rattle comes back I'll create a more permanent solution.
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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #7 on: October 22, 2019, 06:46:44 pm »
Just want to add thanks guys!

This is why model forums are amazing!
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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #8 on: October 23, 2019, 07:50:28 am »
The rattle was back a bit this morning. I think my sponge must have moved a bit. I will take a trip to a DIY shop today for some pipe insulator foam!
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Offline Juliand

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Re: Rattle at idle
« Reply #9 on: October 23, 2019, 08:26:28 am »
If you can take a photo, that would be handy, please, for future reference....'might come in handy one day', as my old dad used to say - he had hundreds of bits of gadgets and things strung up in his shed and garage, ha ha. 

Great contributions on here to solve problems.....I'm amazed at Pudding's knowledge, and Rich, plus others (not to leave anyone out).... :happy2:
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Offline pudding

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Re: Rattle at idle
« Reply #10 on: October 23, 2019, 09:16:58 am »
I can't take any credit for that knowledge as I also found the solution on here years ago when mine started doing it :drinking:   Whoever first figured out the noise was fuel lines tapping on the chassis rail deserves the amazement!  Maybe it came from a VW TSB (Technical Service Bulletin) originally, not sure, but either way it's a cheap fix!

I like the kitchen scrubber method  :grin:
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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #11 on: October 23, 2019, 04:26:29 pm »
Quote from: Juliand on October 23, 2019, 08:26:28 am
If you can take a photo, that would be handy, please, for future reference....'might come in handy one day', as my old dad used to say - he had hundreds of bits of gadgets and things strung up in his shed and garage, ha ha. 

Great contributions on here to solve problems.....I'm amazed at Pudding's knowledge, and Rich, plus others (not to leave anyone out).... :happy2:

Not sure how to upload photos on here??
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Offline pudding

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Re: Rattle at idle
« Reply #12 on: October 23, 2019, 04:33:35 pm »
You need to upload pictures to an image hosting site, such as Flickr or photobucket, drop box etc.   Or if you have Google photos, stick the picture in a public album and copy the link to the forum  :happy2:

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Offline TheBALDpuma

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Re: Rattle at idle
« Reply #13 on: October 24, 2019, 08:57:58 am »
A photo of the bodge (which had no stopped working entirely, I have bought lagging for a proper fix I will do on Friday and take some better photos!)

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Offline pudding

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Re: Rattle at idle
« Reply #14 on: October 24, 2019, 12:15:41 pm »
Yeah that should work  :happy2:  One thing to be mindful of though, is drainage.  Water gets into every nook and cranny in cars and channels like that are left open deliberately to allow it to drain out  :happy2:
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