What happened to your D3/D4 today?

My beautiful new coolant is black again. Given it drives perfectly and doesn’t have signs of a head gasket, I’m guessing it’s leaking EGRs. Urgh. D4 2010 3L so replacement is the only real option, or ignore it

The front left tyre on my D4 had a slow leak, so I took it to the tyre shop - this was the culprit:



Attachment 180305



While it was on the hoist I had a look at the other tyres and found this on the back left:


Attachment 180306



So ..... it looks like someone dropped a pile of screws on the street somewhere and then I drove over them.

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Originally Posted by DiscoJeffster

My beautiful new coolant is black again. Given it drives perfectly and doesn’t have signs of a head gasket, I’m guessing it’s leaking EGRs. Urgh. D4 2010 3L so replacement is the only real option, or ignore it

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Wanna borrow my coolant pressure test rig? My latest trick is to drop the coolant, pump it up and then go over the potential leak points with a mechanics stethoscope. Air moves faster than liquid and makes more noise.

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Originally Posted by Jpdv

Hah! Learned something new. I'd been hitting the right hand steering wheel switch to call up the phone, but was going into the centre dash screen to scroll down to the required number to select and dial. Accidentally hit the 'track advance' button on the left hand wheel switch, and lo and behold, it works as a scroll up/down through the call list when in phone mode... Nothing earth-shattering, but one of those little things that keeps reminding me how well sorted this vehicle is. May help someone else.

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I had no idea. Thanks for that

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Originally Posted by BradC

Wanna borrow my coolant pressure test rig? My latest trick is to drop the coolant, pump it up and then go over the potential leak points with a mechanics stethoscope. Air moves faster than liquid and makes more noise.

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As it isn’t losing coolant and the issue is likely internal I’m not sure it’ll help, but thanks.

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Originally Posted by DiscoJeffster

As it isn’t losing coolant and the issue is likely internal I’m not sure it’ll help, but thanks.

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Are you sure you flushed it properly???

Sorry, I know I shouldn't have, but I couldn't help it. Bad Josh. Bad bad Josh

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Originally Posted by josh.huber

Are you sure you flushed it properly???

Sorry, I know I shouldn't have, but I couldn't help it. Bad Josh. Bad bad Josh

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Pretty sure. I went until it was clear, which to a very long time

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Originally Posted by DiscoJeffster

My beautiful new coolant is black again. Given it drives perfectly and doesn’t have signs of a head gasket, I’m guessing it’s leaking EGRs. Urgh. D4 2010 3L so replacement is the only real option, or ignore it

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It’s the EGR coolers if that’s the case which are evilly expensive. I have similar colouring coming back after oil cooler change but still hopeful it’s just a good flush and refill needed- was going to say delete but that’s not an option on the 3.0 is it?

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Originally Posted by PerthDisco

It’s the EGR coolers if that’s the case which are evilly expensive. I have similar colouring coming back after oil cooler change but still hopeful it’s just a good flush and refill needed- was going to say delete but that’s not an option on the 3.0 is it?

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I’m just going to ignore it. If I don’t look everything will be fine [emoji2][emoji51]

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Originally Posted by DiscoJeffster

I’m just going to ignore it. If I don’t look everything will be fine [emoji2][emoji51]

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Until the water pump craps itself or the coolant jacket in the engine gets blocked.....