Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: T31 2.0 diesel M9R fuel leak underneath motor
No pipe which leaks fuel should be loose. It would be a potential fire hazard even though it is diesel.
If the Xtrail still drives OK and the leak is just a few drops each second then my guess is it could be the return pipe to the fuel tank. This is like an overpressure line. A loose hose to an injector would lose way more fuel than a few drops as it would be pressurised to the common rail pressure.
Trace through the hoses according to your diagram to see if you can locate all the fuel lines and you should find which one it is.
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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28/May/2020, 11:53 pm
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Menno
X-TRAIL NEWBIE
Date Registered: 02-2017
TOTAL POSTS: 45
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Re:
Kev,
Thanks. Yeah I was thinking return-to-tank of fuel pump, fuel filter or the low pressure return from injectors. There is also a 10bar backpressure on the injectors (see second line connected to injectors on diagram), but this is ofcourse not possible, 10bars would leak like a karcher .
Anyway, the Nissan garage is taking care of it, I didn't even see it yet, I'm sure they will fix it but just wanted to brainstorm already a bit and see if anyone knows already exactly which location in the diagram this is.
Because if it is the return of the fuel pump I'm slightly worried that the fuel pump is worn out a bit, but it could also be completely normal (same story for the injectors).
And indeed it would seem crasy to me to leave a pipe open ended even if there normally no leak, for the fire hazard that you mention. Actually that is how they noticed the issue. The cars behind the driver on the motorway were blinking,... he looked and saw smoke... if this was petrol engine it would already be in flames.
He reduces speed to 70km/h and the drops stopped hitting he exhaust.
Cheers. I'll let you know the story from the garage.
--- Menno
2011 X-Trail T31 facelift - 2.0 dCi - 4WD Manual Transmission - With sunroof (Hell Yeah!)
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29/May/2020, 1:24 am
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