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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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D5 Euro4 Leak off test problemViews : 732 Replies : 5Users Viewing This Thread : |
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Apr 26th, 2018, 11:39 | #1 |
Me ? Surely Not!
Last Online: Apr 25th, 2024 19:48
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
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D5 Euro4 Leak off test problem
Hi, this morning I decided to do a leak off test on my 2007 XC90 D5 185 ( Euro 4 ) using a Sealey leak off kit.
I had done one some time ago on my previous S60 D5 E4 using a home made kit borrowed from Outnumbered on here and it all went exactly as expected. This morning I unclipped the original leak back return lines from all of the injectors and left them resting on the engine. I then inserted what I took to be the correct adaptor from the kit into each injector and coupled up the plastic hoses and bottles. The car started normally and some diesel was being returned to the measuring containers BUT diesel was pouring from each of the original, disconnected Volvo leak back couplings so I had to stop the test. I refitted the original leak back pipes and the car runs correctly with no leaks. Any ideas as to why because obviously this should not be happening. Hopefully it's something that I have done wrong when connecting the Sealey kit? I have also posted this query in the General Diesel Engine Section
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“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
Apr 26th, 2018, 11:53 | #2 |
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Last Online: Dec 26th, 2021 13:42
Join Date: Dec 2013
Location: Crewe
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The injectors share a fuel return circuit with the HP pump so the leaking fuel is excess from the HP pump which hasn't gone straight back to the main fuel tank.
Suspending the leak off lines vertically is usually enough to prevent loss, alternatively clamp the line with molegrips.
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2002 S60 SE D5 Manual 209000 miles |
Apr 26th, 2018, 11:57 | #3 |
Me ? Surely Not!
Last Online: Apr 25th, 2024 19:48
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
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Many thanks, I will clamp the return hose off as suggested.
I can't remember having to do this on my previous D5 E4 so thought I may have a problem.
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“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
Apr 26th, 2018, 12:09 | #4 |
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Last Online: Dec 26th, 2021 13:42
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Location: Crewe
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I've read of several E4 owners experiencing the same and several without issue so not sure what the determining factor is.
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2002 S60 SE D5 Manual 209000 miles |
Apr 26th, 2018, 12:47 | #5 |
Me ? Surely Not!
Last Online: Apr 25th, 2024 19:48
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
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Yes Simon, I certainly wasn't expecting it to happen as it didn't when I did a leak off test some years ago on my S60 which was fitted with a D5 E4.
I did consider clamping off the Volvo return pipe but thought it safer to ask first. Cheers
__________________
“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
Apr 26th, 2018, 14:09 | #6 |
Me ? Surely Not!
Last Online: Apr 25th, 2024 19:48
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
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Clamping the pipe worked well and allowed me to complete the leak back test.
All were within tolerance. Thanks
__________________
“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
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