Sounds like Poos sold you a POS. Sent from my iPhone
> On Feb 6, 2021, at 1:51 PM, Meade Dillon via Mercedes <mercedes@okiebenz.com> > wrote: > > I bought this '95 E300 from Dan a couple years ago, and it had a fuel leak > at the fuel filter holder when I picked it up. There are five different > hoses that connect to this assembly, all use o-rings to make the seal, and > one at the top center was leaking. It was a slow leak, Dan thought maybe > the filter holder assembly itself had a defect, so he'd already purchased a > new assembly and it came with the car. > > I bought a thicker o-ring, installed that, and it seemed to solve the > problem. Until it didn't. A few weeks ago I noticed the smell of diesel > fuel wafting from under the hood ("Say, is that diesel fuel I smell?" said > somebody's girlfriend on Kaleb's website as she smiles into the camera). A > couple days later it had turned into a gusher, and I had not even been > driving the car. Big pool of diesel under the front bumper. > > The leak had returned with a vengeance. Engine running, the middle hose > connection would pulse in and out. OK, time to swap in that new assembly > and some new o-rings, right? > > I scrounged around for about 30 minutes until I finally found my stash of > spare o-rings for the OM606 non-turbo fuel system, and then removed all the > fuel lines from the filter holder. Loosened the center bolt / valve > assembly (that holds the big main filter in place) and then removed the > bolts that mount the fuel filter holder in place on the head. Lifted out > the filter and holder, and finished removing the filter on the workbench so > I could hold it upright and not spill anymore fuel. Replaced all the > O-rings, and then got out a new fuel filter and noticed something odd as I > compared it with the old. Old filter, with the MB star mark, has the > center rubber seal just glued to the top of the filter, and it was in two > pieces, floating around the top of the filter and obviously not sealing > anything. New filter (Mahle) has a steel lip folded over the center rubber > seal, keeping it in place. > > I suspect that the failure of that center rubber seal meant that the filter > wasn't filtering anything, and so the pressure of the flow from the lift > pump was going directly to the outlet line and that was too much for the > o-ring to seal. I think if I had just replaced the big filter, the leak > would have been solved. > > Put it all back together and fired up the engine, leak is gone. > ------------- > Max > Charleston SC > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com