For a couple of months now I’ve had diesel smells in the cabin on idle once the engine is warm but can’t seem to find any leaks. Now recently I’ve seen some vapours coming out of the bonnet, even when the stop/start has kicked in.
I have no fault codes, no loss of power nor mpg so I’m stumped. Going into my indie in a few weeks for diagnosis and hopefully fix.
Could it be the crossover pipe?
I’ve probably driven around 5k miles since the problem started, is it safe to continue?
Your experience and knowledge would be greatly appreciated 1978 Series 3 88 Military Green (Gone)
1983 110 V8 Masai Red (Gone)
1997 Discovery 1 XS Cobalt Blue (Gone)
1999 Defender 110 TD5 Safari Epsom Green (Gone)
2001 Freelander Sport Buckingham Blue (Gone)
2016 Discovery 4 Landmark Yulong White "Larry" (Written off)
2015 Discovery 4 HSE Luxury Corris Grey "Sol"
30th Nov 2024 6:30 pm
NC500
Member Since: 18 Sep 2017
Location: On the NC500
Posts: 549
Probably one of the egr pipes. They weaken and begin their long slow failure until you eventually get a fault code and an audible signal (rushing air). Fixable with body on if the nuts undo, body off if they don’t.
Thanks NC, I’ll get them to try a smoke test which should hopefully show this up. Surprising though as it’s only a 65-plate although it is on 105k miles now. Should still be okay to drive?1978 Series 3 88 Military Green (Gone)
1983 110 V8 Masai Red (Gone)
1997 Discovery 1 XS Cobalt Blue (Gone)
1999 Defender 110 TD5 Safari Epsom Green (Gone)
2001 Freelander Sport Buckingham Blue (Gone)
2016 Discovery 4 Landmark Yulong White "Larry" (Written off)
2015 Discovery 4 HSE Luxury Corris Grey "Sol"
30th Nov 2024 10:42 pm
NC500
Member Since: 18 Sep 2017
Location: On the NC500
Posts: 549
I’m no expert but there is quite a lot of wiring in that area, probably not wise to blast it with hot exhaust gas too often.
1st Dec 2024 2:29 pm
Sylvester19
Member Since: 17 Jul 2020
Location: Central Scotland
Posts: 132
Any other vehicle it would be a leaking injector washer, although they can be challenging
2nd Dec 2024 2:15 am
darrind
Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2908
If you remove the thin metal heat shields from in the wheel arch you may be able to see evidence of the leaking.
It’s part of the complete eye and cooler assembly but the pipe on its own can be purchased from LR
To swap the pipes you have to remove the whole egr assemblyMust stop buying shiny toys....
2nd Dec 2024 9:40 am
evo smith
Member Since: 20 Mar 2010
Location: jersey, channel islands
Posts: 16
I had a very similar experience to what you are describing.
The diesel return line to the fuel tank from the HPFP circuit was fractured in the area around the steering column/ bulkhead causing a slight leak.
I could smell it all the time, but could only visually see the diesel vapours illuminated by my headlights when the vehicle was parked up idling.
Thank you all, I’ll see what I can spot, otherwise wait and see what the professional diagnosis brings 1978 Series 3 88 Military Green (Gone)
1983 110 V8 Masai Red (Gone)
1997 Discovery 1 XS Cobalt Blue (Gone)
1999 Defender 110 TD5 Safari Epsom Green (Gone)
2001 Freelander Sport Buckingham Blue (Gone)
2016 Discovery 4 Landmark Yulong White "Larry" (Written off)
2015 Discovery 4 HSE Luxury Corris Grey "Sol"
Well, diagnostics done and fix complete (I hope). Turned out to be a tiny chip in the “dome” on the end of one of the fuel lines from the rail squirting out the tiniest of fuel, the hot fumes of which were then sucked into the heating vents.
Although my indie said they hadn’t seen it before their supplier said it wasn’t uncommon.
Over £400 in labour as there was so much to strip out to get to it so I don’t wish this one on anyone 1978 Series 3 88 Military Green (Gone)
1983 110 V8 Masai Red (Gone)
1997 Discovery 1 XS Cobalt Blue (Gone)
1999 Defender 110 TD5 Safari Epsom Green (Gone)
2001 Freelander Sport Buckingham Blue (Gone)
2016 Discovery 4 Landmark Yulong White "Larry" (Written off)
2015 Discovery 4 HSE Luxury Corris Grey "Sol"
20th Dec 2024 11:03 pm
Sylvester19
Member Since: 17 Jul 2020
Location: Central Scotland
Posts: 132
Do you know where this was on the rail, sounds like 4hrs work?
21st Dec 2024 3:13 am
NC500
Member Since: 18 Sep 2017
Location: On the NC500
Posts: 549
Apparently one of the fuel lines to the injector (?). They had to strip lots out to get to it and replace the pipe. About £60 from LR for a kinky pipe.
TBH I’m just glad it’s fixed, over 6,000 miles driven with this flesh wound and the D4 never missed a beat 1978 Series 3 88 Military Green (Gone)
1983 110 V8 Masai Red (Gone)
1997 Discovery 1 XS Cobalt Blue (Gone)
1999 Defender 110 TD5 Safari Epsom Green (Gone)
2001 Freelander Sport Buckingham Blue (Gone)
2016 Discovery 4 Landmark Yulong White "Larry" (Written off)
2015 Discovery 4 HSE Luxury Corris Grey "Sol"
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