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Hi All, my 2002 c180 CL203/ M111 sprung a fuel leak from the fuel pressure regulator. I replaced the O-ring, but leak continued. I then replaced the regulator, and to my dismay the leak continued!
I finally realised, the issue is actually the metal retaining frame of the fuel distributor, that the regulator sits in. There are slots in the frame that a metal clamp passes through. Over time, the metal clamp pushes against the frame and pushes it out buckling the thin metal of the fuel distributor frame. I used some pliers to press the frame down against the clamp, and this finally stopped the fuel from leaking! Hope this helps others.. hopefully this helps explain the issue. Metal fatigue over time allows the fuel pressure regulator to start leaking. A pair of pliers were used to clamp the frame down and stop the leak.
Interesting. What a weird failure mode for the rail. Did the leak just suddenly occur one day?
Can't say I've ever heard of anyone else having this problem. Maybe you got a defective rail assembly by luck. In your situation I'd be worried that the metal buckles again. Might be better to replace the rail with one from a wrecker.
Interesting. What a weird failure mode for the rail. Did the leak just suddenly occur one day?
Can't say I've ever heard of anyone else having this problem. Maybe you got a defective rail assembly by luck. In your situation I'd be worried that the metal buckles again. Might be better to replace the rail with one from a wrecker.
HI, I noticed a smell of petrol when first starting the car in the morning. It seemed to slow/stop as the car warmed up.
I eventually traced it to dripping off the bottom of the regulator.
I think its a symptom of the age of the car, the metal used is fairly weak, it was easy to use pliers/ multi-grips to crimp the thin frame back in position.
Suspect the vibration and pulsing over 20 years allowed the gap to open up just enough for a tiny amount of petrol to seep out.. I will keep an eye on it, and maybe pick up a replacement rail assembly when i am at the wreckers again..
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C180/CL203/M111 Fuel pressure regulator leak
Did the leak just suddenly occur one day?
