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  1. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    starting a new thread called Engine swap please chim in if you have advice
  2. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    OK sweet i was still a little unclear on why there was air headed to the IP
  3. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    another thought if the cam lobe is very worn and if the lift pump isnt able to push enough fuel up could it create a knock? Im thinking that the shavings in the oil filter were from the cam lobe. the lift pump looked pretty new so it was probably replaced not to long before I bought her. The...
  4. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    what are the lines that carry air to the IP and brake system?
  5. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    just pulled the cover on the side it seems to be coming from. visually everything looks great i couldn't get a rocker to budge with physical force. however the bolts holding the cover on were not tight obviously they were holding it down and oil wasn't seeping through to noticeably but could...
  6. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    there was a mention in the past of MMO, any thoughts? i would have to let it run and most likely drive her for a considerable amount of time for there to be any effect right? ive never used MMO before its a dilution product right? you cant just fill the fuel filter with it? and do not feel safe...
  7. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    *UPDATE* sorry i was finishing finals and had to focus on those alone. i drained the oil just to be sure there was no diesel and i would say pretty confidently there was not. i also put water in the old pump and actuated it and water did not come through on the arm side. When I started her up...
  8. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    I did try a balance test but it was the first time I did one. The knocking never went away and I held each open till the engine started to bog. The nut to loosen is the one on the Injector correct. Not the IP right? Not sure if I should give it another go? I did not inspect the lift pump but...
  9. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    have another video that shows the knock while increasing the rpms if this could bring any more ideas. Can anyone tell if this is a Fuel knock or a component tick? (rocker arm or valve) this did not occur till the lift pump failed she ran very smooth before. ANY IDEAS ARE APPRECIATED...
  10. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    Brian x so air was getting into your system? Another theory I have is the o rings on the injectors went bad from sucking in air? I know running out of fuel can dry them out? How exactly did you fix your knock
  11. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    Yes it is, so that is just for pressure to be maintained right. extra fuel just flows back to the tank
  12. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    so id like to do this purge before i try the IP timing just because its good for the system regardless. in order to do so i need to re arrange the fuel hoses the goal is to create two cycles one of fuel filter to fuel tank and one of purge bottle to that same purge bottle. I dont know if you...
  13. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    I know when these IDIs run out of fuel some fuel system components can get damaged. Have you guys had to deal with that? That's what I'm thinking, when it started to stall(as the fuel pump died and it was not able to supply fuel) it started an increasing knock until she stalled completely. The...
  14. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    I did time the cam
  15. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    Roger that, I've also heard of using a long large flat head.
  16. I

    HARD KNOCK AFTER LIFT PUMP REPLACEMENT

    Link to video above lift pump went out on highway and she stalled. towed her home replaced to pump and she started right up but with a nasty knock. i know when these run out of fuel damage can occur to numerous parts (injectors ,pumps, rocker arms yata yata) if you have ran into this before or...
  17. I

    Help please! new 87 6.9 IDI

    I just bought a 87 f250 6.9 diesel IDI. I have a international school bus with the same engine so I've climbed around it a bit. The lift pump gave out about an hour into my ride home after I towed it back I ensured it was the lift pump causing issues by ensuring flow from tanks, aswell as no...

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