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  1. Rupert8

    V-belt tension

    Interesting. How do you use it? Across the belt or to position the alternator?
  2. Rupert8

    V-belt tension

    Yep, good point on them loosening after the shop tightened them. I'll re-adjust. And yes, I grabbed the block on the alternator with a large wrench and got the belt pretty darn tight, it's just showing more vibration (like a guitar string kind of thing) than I was expecting to see. Is it...
  3. Rupert8

    V-belt tension

    Hello, 6.9 IDI, no serpentine belt: I've just replaced my leaky fuel pump and vacuum pump. Putting the vacuum pump back I noticed some of the v-belts seem a little loose, even after a shop supposedly tensioned them six months ago while doing some other work. Since I may not know what I'm...
  4. Rupert8

    Return line question

    Thanks. I struggled to find that fitting locally so reinstalled the steel line from the lift pump to the filter, with a new olive. I had to bend the line slightly to make it couple up with the new pump, however, which makes me a little nervous going forwards. Is it weaker now? But so far so good...
  5. Rupert8

    Return line question

    Hi, looking for the fitting specs for the fuel pump outlet (to the fuel filter). Planning to install a rubber hose to replace the steel line with the heater.
  6. Rupert8

    Return line question

    True - and I am the proud owner of a set, as above, with a couple already installed on the return line. And they came with a bumper sticker which is always bonus points in my book.... Thanks. But looking for the fuel pump outlet type and sizing if anyone has it to try to get the hard line...
  7. Rupert8

    Return line question

    I'm digging into finding the source of the air intrusion tomorrow, have the day off work. Thanks for all the replies so far. Really want to get this thing starting up better..... What is the size and type of the fitting on the outlet side of the fuel pump? Does that require an olive as well...
  8. Rupert8

    Return line question

    And again, thank you for the clear explanation. Getting it done as soon as I can.
  9. Rupert8

    Return line question

    Thanks. Right - but mine also seems to have a steel line coming directly from the injection pump, which would appear to be eliminated in this setup unless I'm mistaken. Based on @IDIBRONCO, think I'll just leave it be. Makes sense.
  10. Rupert8

    Return line question

    So this just eliminates the return line from the injection pump or am I missing something here? Just the back two injectors return to the tank?
  11. Rupert8

    Knocking after injector change

    Sorry for the slow reply. I'm about to change out the olives (I set up another thread to ask about how to approach that). I'll report back. Thanks.
  12. Rupert8

    Return line question

    Golden. Thanks for the clarity. Is there any way to replace that steel line and fitting with rubber hose? Wondering if heat from the engine is an issue for rubber hose, though, given where it's located. Aha! I was just looking at the hard line between the fuel filter and the injection pump...
  13. Rupert8

    Return line question

    Thanks so much. Perfect. I found some at Russ Repair and just ordered them, two different sizes. I'll just replace the one at the back of the engine since that is really wobbly. And go from there....
  14. Rupert8

    Return line question

    Thanks. Regarding the return line to the fuel filter, just cap that at each end? Any chance of air then making its way through the injection pump? That wouldn't be good. Or building pressure elsewhere?
  15. Rupert8

    Return line question

    No - I didn't, thanks. Totally missed that. It will be checked out this weekend, or before if possible. Great info! I'll check this too. I need to research what an olive seal is but I don't doubt that this forum has that somewhere! No! It has an after-market one. Thanks. I've heard these are...
  16. Rupert8

    Return line question

    Thanks, yes, I see your point. I'm wondering, though, if air can get in at this apparently loose spot when the engine is off then maybe it is bubbling up to the highest point, which is likely the air filter? The truck runs fine when it's going, but is hard to start and each time it's hard to...
  17. Rupert8

    Return line question

    Hello, Still trying to find the source of air intrusion. O-rings etc all replaced. New return lines..... When I leave the truck for more than a few hours there is air trapped up in the air filter - when I bleed it only air comes out for a while. My question: The steel return line connection...
  18. Rupert8

    Knocking after injector change

    Air intrusion. Right. We'll, I replaced all the fuel return lines recently. Where else are common points of ingress? I'll look into that.
  19. Rupert8

    Knocking after injector change

    Thanks for the information. So may I ask what the common indicative symptoms of a failing fuel injection pump are? It sometimes struggles to start when it's warm (but not always...). It is currently struggling to start when cold, which is new. Used to fire up first or at most second try in all...
  20. Rupert8

    Knocking after injector change

    Hello, sorry for the slow reply. I was waiting a while to get a clear picture of where things stood and, well, you know.... But the new injectors are functioning fine. It's been a few months now since they were installed. That's the good news. The bad news - it's having a hard time starting...
  21. Rupert8

    CDR valve - what is this part?

    Thanks. Was this on a 6.9? I tried yesterday and while the existing metal tube just slots right into place, the rubber one (ribbed part) won't fit down inside the valley pan, and didn't seem to want to go any other way. My metal tube is in good shape, happily, so I'm using that, but curious...
  22. Rupert8

    CDR valve - what is this part?

    Thanks. Does it replace the existing metal tube or go inside it? (Yes, stock placement.)
  23. Rupert8

    CDR valve - what is this part?

    Hi, What is the part circled in the photo? It's made of rubber. Going to replace the llarge 'O' gasket (also pictured) on my CDR valve but not sure what to do with the other part in the kit I bought. The CDR currently has a small o-ring going into the metal tube which then goes down into the...
  24. Rupert8

    Changed CDR valve and now trouble...

    These runaway engines tales are like the best bedtime stories. And my takeaway from all of these is to cut the air supply in the case of one happening. Small chance of it happening, but valuable knowledge.
  25. Rupert8

    Changed CDR valve and now trouble...

    Fascinating. So we are talking about removing the air filter and blocking the air intake at that location? (All done while the engine is running very fast?)

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