The Org - Serving W116 Enthusiasts since 2004!
Started by Feather535, 05 February 2023, 11:46 AM
Quote from: revilla on 05 February 2023, 10:35 PMDid you touch/change the 3rd and more difficult o-ring inside the chamber (allen hex screw) which is attached/sealed to the bottom of the small shaft? If yes, wad the tiny little clip that holds the nut and assembly together place back correctly? Does the shaft move freely?What do you see inside that chamber when depressing the shaft?...Can you repeat your exercise of running the pump and unscrewing the 12mm line?
Quote from: revilla on 05 February 2023, 10:35 PMThe hypothesis we're testing is CP = SP = 5.5bars because the insides of the PR is blocking fuel from flowing to/from WUR. There are only 3 choices here (yes, no, partially). Need your results to continue or abort this hypothesis.
Quote from: revilla on 10 February 2023, 12:28 AMCorrect.If fuel doesn't flow out we'll look for the blockage upstream and downstream. Could be the inlet at wur, the be plate itself (valve), the inside of your FD, etc. We need to systematically look at every piece on the path. We'll find the problem.Ps.: that little o-ring inside, are you sure is the correct size?Its id/od/thickness are so precise! This thing is "like heat fusioned" to the bottom of the shaft from factory. If it moves it's disaster...
Quote from: Feather535 on 13 February 2023, 05:43 PM3. With everything back in place and the fuel pump running, system pressure and control pressure are still the same -- but lower then usual: 4.8 bar instead of 5.5, which they always were before. Strange!4. I verified that fuel comes out when the 12mm fitting for the WUR return on the FP is opened. But does this necessarily mean fuel is passing through the WUR and coming back?
Quote from: ramiro on 15 February 2023, 11:59 AMSo you have fuel comming out at the WUR return port at the FD ?I think that it is normal that fuel comes there out because it is also connected to the main FD return line to the tank but it shouldn't have any pressure.
Quote from: ramiro on 22 February 2023, 04:34 AMit looks like the pin that holds the bimetal strip is nearly at the top
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