Huge fuel leak when I start the car after standing for a long time. Then it stops

[Fatandre]

Hey guys.
I had my car in winter hybernation and after starting it it spit a huge amount of fuel under the car. Its on the driver side of the engine.
Then when starting it again the same day no leak.
I have had this happen twice when standing for lets say 8 weeks.
Last time my mechanic changed the fuel lines and I thought I had it fixed but now it happened again.
its next to the left front wheel where the leak appears

[Belgiumbarry]

that place are indeed the fuel lines and short hoses to the fuel rails. But strange it leaks once and stops.
I had recently a similar fuel leak under the car , but under the fuel tank. I had put the car in the garage with almost full tank , and it must have been leaking from above the tank as i see a wet tank side and under it.... but it stopped and now no more.

[dragon850]

Happens all the time, its the clamps you can't get to.
Look up my thread on upgrading to seamless fuel hose.

[Belgiumbarry]

Ed , do you have a link to that thread ? i can't find it with search .....
And is this about front leak or above fuel tank ? i remember to have seen threads were they cut holes in bottom plate to reach clamps above fuel tank.

[Fatandre]

Ed , do you have a link to that thread ? i can't find it with search .....
And is this about front leak or above fuel tank ? i remember to have seen threads were they cut holes in bottom plate to reach clamps above fuel tank.

Here we go

https://www.bimmerforums.com/forum/s...engine-bay-M70

[Belgiumbarry]

thanks Fatandre !

[TedBobo]

Timely thread. After replacing the lines/clamps in that area about 6yrs ago, I'm experiencing a minor leak too.

[Joe850V12]

I also bought the correct metric hose, and bmw clamps, continue to fight fuel leaks, some small,damp with oder, one was dripping badly. I have switched to worm style clamps and try not to overtighten, seens OK, but we'll see what happens in spring, 8 more weeks... I will bookmark this post. Let us know how the change to stainless and AN fitting go, if you decide to do it.
Thanks
Joe

[rogbmw]

Make sure that you change all 4 hoses. There is a short set up top (easiest to get to by removing the housing that holds the cabin filters). Also, there is another set below. I had the same problem once - and what it was is that the clamps simply needed to be tightened.

[JDP530]

I used the aba type of fuel injection clamps from one end of car to the other. The worm gear clamps will cut into the hose. I also used Gates Barricade fuel injection hose to replace all of the original hoses. https://www.gates.com/us/en/fluid-po...-pkg/p/p100111
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