Compression issue? Parts and guide to fix

Discussion in 'Mech Tech' started by jameswick89, Mar 19, 2020.

  1. You mentioned in your parts list 2nd hand camshaft obtained. Is that the one in the picture earlier in the thread which everyone mentioned was well worn? Is it also a hydraulic cam?
     
  2. Zed

    Zed Gradually getting grumpier

    ...and show us the pre-loved cam journals - as close up as you can please.
     
  3. I'm not sure the 2nd hand cam is that worn.. Just the coating gone in a nice pattern...dont look to be worn down like the original which has channels in it.. but close ups would help.. I think Zedders wants the bearing bits doing as they looked rough but hard to tell in the photo..

    [​IMG]

    More likely the sunken seat wearing out the cam than the other way round I'd have though with it pushing on it more, sunken seats are more of an overheating thing apparently

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  4. Just out shopping will take lots of photos shortly
     
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  5. Here are a couple of photos
     

    Attached Files:

  6. Zed

    Zed Gradually getting grumpier

    IF someone hadn't left it to go rusty, pitting both the lobes and the journals, that might have been ok.
    But it's scrap IMO.
    upload_2020-5-21_19-27-1.png
     
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  7. davidoft

    davidoft Sponsor

    maybe, but hard to be certain from a picture

    I would scotch Brite or 1500 that and see , you would be surprised what cleans up
     
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  8. Zed

    Zed Gradually getting grumpier

    That would be nice but I'm sceptical. A few pits on the journals would be ok but on the lobe ramps that's acting like a file?
    There's only one way to find out... :thumbsup:
     
  9. I will give it a go shortly then let you know how it goes.

    @davidoft

    Do you think you might have a head laying about I could possibly buy or do you think it's worth putting a wanted add

    Also can someone just double check those links please x
     
  10. Zed

    Zed Gradually getting grumpier

    Links look correct to me. Is the piston size on the crown?
     
  11. Gave it a little sand with 2000 grit
     

    Attached Files:

  12. Zed

    Zed Gradually getting grumpier

    What does it feel like with your nail?
    upload_2020-5-21_20-7-42.png
     
  13. It feels really smooth to me no bumps or divets.

    I have a some putting on the piston head I can see now I have started to clean. Will that be a big issue also no size on them I can see
     
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  14. Oversize will have a number on stock didn't bother..so 94mm if you're 2ltr... piston pits prob ok no sharp edges

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  15. davidoft

    davidoft Sponsor


    Pm me, include part number etc, I have lots of Heads :)
     
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  16. davidoft

    davidoft Sponsor

    Sounds good enough , do the wear marks on the lobes disappear if you wet n dry them ? Use oil with paper
     
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  17. Zed

    Zed Gradually getting grumpier

    And sand round and round...
     
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  18. Quick question can I leave the fly wheel on when I split it in half or does it need to come off
     
  19. It'll need to come off if you're changing your main bearings.. the crank's a surprisingly fair old weight even with it off

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    Last edited: May 22, 2020
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