...the '02-'03 hi pumps, which suffer uniquely different fuel leakage issues or failures.
Doktor A
Question. What would cause a fairly severe fule leak from the left side of the hi-pump when the engine is cold in the morning? Our '03 2500 OM612 has just developed this.
Background: The hard plastic lines were replaced a few months back at the suggestion of the mechanic Durring the replacment of the serpentine belt he noticed some fuel residue in that area. The reasoning at the time was that the white rubber type gaskets were worn. (Worth a mention, we burn B-100 from a large local producer.) After the lines were replaced he did a check up and there was no evidence of leakage.
Then the other morning my employee complained that the van wouldn't start. I investigated, gave it a 8 second crank with a no start. Waited. Gave it a second crank and withing 5 seconds it caught. It choked for a few moments and then smoothed out. It seemed as though it had lost it's prime. I unlatched the hood to investigate for loose fittings, and upon walking around the front of the van noticed the accumulated puddle of fuel on the shop floor.
I left it running and peeked underneath. I noticed that the fuel was dripping steadily, but slowing. I placed a clean cardboard under, and let it idle for aprox 5 minutes. The dripping slowly tapered off. It's leaking directly onto the alternator. This I am sure is not good. We did our short delivery run (15km round trip) and had no problems. We shut the van off several times durring that run, and didn't notice any starting issues or large puddles of fuel accumulating.
I parked it scratching my head. It sat for 3 days. This morning I went to start it. The temp this morn was around 10ºC. Same story. Crank, no start, inspected, saw the fuel puddle, cranked more, started, leak dissipated.
Any advice?