N57

Bull3t Proof · 03-14-2021, 07:55 AM

Hi Guys,

Trust everyone keeping safe!

My N57 - ran perfectly until Fuel Return line was replaced because of damage to OEM Line. It was replaced with OEM part.

Since then - third gear Open Throttle - the return line on the Injectors Pop off - this is the OEM crimped Ends - they jus pop off.

I have stripped the car over 10 times to try and figure out what could the issue be. With the old pipe that was "repaired" never had any issues - since the repaired pipe was replaced with OEM pipe - I have had this issue

Reason for replacing repaired pipe - Used Q-bond to stick Nipple back on - but broke after 2 weeks. But it was an awesome 2 weeks

So...back to the Issue...any ideas what i can look at? I was thinking injectors - but how can injectors just fail by replacing a pipe?

335dlci · 03-14-2021, 09:48 AM

Pic would be helpful

Bull3t Proof · 03-14-2021, 11:38 AM

Hi,

First Blue Circle in the centre - Runs to Injector Return - this Pops off...if this does NOT pop off...then the OEM crimps on the Injector return Pops off :-(

https://ibb.co/SxxHZYW

335dlci · 03-14-2021, 01:15 PM

Bad injector?

jacbo · 03-14-2021, 03:26 PM

did you install them on properly? they need to go on quite far down and you need to get a click when you pop the locking bit back into place.

or are you missing an o-ring which came off during replacement? they are tiny little things and slide on the return section of the injector.

Bull3t Proof · 03-14-2021, 03:37 PM

All installed correctly...

I was thinking bad injector...but can it just die within 20Minutes of just replacing a damaged Pipe? Hope not...

Now I am assuming could be something stuck in the Main fuel return line going to tank... just didnt want to strip - thought some-one here may have experienced the same issue.

jacbo · 03-14-2021, 04:34 PM

is the return line popping off on every injector?

Bull3t Proof · 03-17-2021, 08:12 AM

Pops off on one...then I use an aftermarket clamp..then the next one pops off...and so forth.

Bull3t Proof · 03-20-2021, 04:19 AM

Quote:

Originally Posted by 335dlci

Bad injector?

So.. have had a look at injector values on ISTA...

All 5 injectors average 0.1 to 0.3 on idle...Only Cylinder 3 stays at 1.5...and as i rev up...it goes to 3.0...didnt rev higher, but I assume it would go up as well.

So next question... is the injector dead? Could this be causing excessive pressure on the Return Line?

03-14-2021, 07:55 AM	#1
Bull3t Proof New Member 0 Rep 9 Posts Drives: 330d LCi Join Date: Oct 2015 Location: South Africa iTrader: (0)	N57 - Popping Leak Off Pipe Hi Guys, Trust everyone keeping safe! My N57 - ran perfectly until Fuel Return line was replaced because of damage to OEM Line. It was replaced with OEM part. Since then - third gear Open Throttle - the return line on the Injectors Pop off - this is the OEM crimped Ends - they jus pop off. I have stripped the car over 10 times to try and figure out what could the issue be. With the old pipe that was "repaired" never had any issues - since the repaired pipe was replaced with OEM pipe - I have had this issue Reason for replacing repaired pipe - Used Q-bond to stick Nipple back on - but broke after 2 weeks. But it was an awesome 2 weeks So...back to the Issue...any ideas what i can look at? I was thinking injectors - but how can injectors just fail by replacing a pipe?
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03-14-2021, 09:48 AM	#2
335dlci Lieutenant Colonel 277 Rep 1,574 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)	Pic would be helpful
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03-14-2021, 11:38 AM	#3
Bull3t Proof New Member 0 Rep 9 Posts Drives: 330d LCi Join Date: Oct 2015 Location: South Africa iTrader: (0)	Hi, First Blue Circle in the centre - Runs to Injector Return - this Pops off...if this does NOT pop off...then the OEM crimps on the Injector return Pops off :-( https://ibb.co/SxxHZYW
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03-14-2021, 01:15 PM	#4
335dlci Lieutenant Colonel 277 Rep 1,574 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)	Bad injector?
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03-14-2021, 03:26 PM	#5
jacbo Second Lieutenant 79 Rep 287 Posts Drives: E90 330d LCI Join Date: Sep 2020 Location: Cheshire iTrader: (0)	did you install them on properly? they need to go on quite far down and you need to get a click when you pop the locking bit back into place. or are you missing an o-ring which came off during replacement? they are tiny little things and slide on the return section of the injector.
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03-14-2021, 03:37 PM	#6
Bull3t Proof New Member 0 Rep 9 Posts Drives: 330d LCi Join Date: Oct 2015 Location: South Africa iTrader: (0)	All installed correctly... I was thinking bad injector...but can it just die within 20Minutes of just replacing a damaged Pipe? Hope not... Now I am assuming could be something stuck in the Main fuel return line going to tank... just didnt want to strip - thought some-one here may have experienced the same issue.
	Appreciate 0 Quote

03-14-2021, 04:34 PM	#7
jacbo Second Lieutenant 79 Rep 287 Posts Drives: E90 330d LCI Join Date: Sep 2020 Location: Cheshire iTrader: (0)	is the return line popping off on every injector?
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03-17-2021, 08:12 AM	#8
Bull3t Proof New Member 0 Rep 9 Posts Drives: 330d LCi Join Date: Oct 2015 Location: South Africa iTrader: (0)	Pops off on one...then I use an aftermarket clamp..then the next one pops off...and so forth.
	Appreciate 0 Quote