Most liked posts in thread: 1275 Motor Overhaul from Atlanta

  1. cristo

    cristo Well-Known Member

    Jan 4, 2015
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  2. Crashton

    Crashton Club Coordinator

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    Do you think the engine was run with way to much spark advance? Knock knock.... If one piston has that kind of damage I'd suspect the others may too. Although it doesn't mater since you'll be putting in new pistons in anyway.
     
  3. Crashton

    Crashton Club Coordinator

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    Thanks for the consensus. I thought that might be the case. The broken piston made me think knock. I have seen that before, but those bearings had me puzzled. Guess your customer needs to run good gas & less advance on the timing.
     
  4. 00Mini

    00Mini Well-Known Member

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    The belt setup really looks like a winner.
     
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  5. Minidave

    Minidave Well-Known Member
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    I've never installed one before, so there was a learning process but it sure looks slick!
     
  6. Minidave

    Minidave Well-Known Member
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    Cranked up oil pressure - I prefilled the oil filter cannister so it came up quickly!

    I need to run down to the station and pick up some petrol, then it's just about ready to make some noise!

     
  7. Minidave

    Minidave Well-Known Member
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    Dec 22, 2009
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    So, today was the break in run, my friend Dan suggested I should use curve #7 on the CSI distributor, so I set it there - could not be easier - turn the key on and count the blinks. It was set at three....you need a tiny little screwdriver to change the setting, I turned it 4 clicks then checked it again - 7 is the lucky number!

    It fired right up and after I adjusted the carb needle a bit it settled down nicely - it's not as smooth as I'd like free running like this, but then I have no idea what needle is in the carb right now - I should probably check that! [​IMG]
    I use this same carb on all the engines I run in the stand, 998's to 1410's....so it won't be right for all of them, just something to let me run in the cam.

    I let it run for 20 min at 2K RPM as that's what the cam maker recommends - the temp stayed right at 165-170. I'm running an old radiator off my '89 Racing Green in the test stand so sometimes it runs a little hotter than if it had an aluminum, so I have an extra electric fan outside the radiator if I need it - it's cold enough today that wasn't an issue.

    Engine sounds sweet, although when you move the camera in close all these A series engines sound pretty thrashy...still it ran sweet. All that's left to do now is let it cool off then load it in the crate to go home on Monday.

    Then it's up to the owner, but I'll bet he'll take a little time off the Moke project to get it back in his car. I'm anxious to hear how it does once it's back in the car.

    (18) Brad's 1275 engine break in run - YouTube
     
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  8. 00Mini

    00Mini Well-Known Member

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    Really does sound great. Did you change out the fuel pump ??
     
  9. Minidave

    Minidave Well-Known Member
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    No, it was working fine.

    I think the carb was way out of adjustment. I also set the timing correctly, it was pretty retarded. It fairly purrs now.....

    I'll drain the coolant then pull it out of the engine stand so I can load it in the crate tomorrow and ship it out on Monday.
     
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  10. Sully

    Sully Administrator
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    Looking forward to watching this build!
     
  11. Minidave

    Minidave Well-Known Member
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    The unboxing.....I didn't take a lot of pics - but suffice to say everything came thru perfectly - even the jug of oil - we both wondered if it would just be a big puddle when it got here, but no worries.

    IMG_20201029_114053R.jpg

    IMG_20201029_114556R.jpg

    IMG_20201029_120150R.jpg

    IMG_20201029_120348R.jpg
     
  12. MCS02

    MCS02 Moderator
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    The cylinder on the left looks like it was burning oil more than the others. Is that the case?
     
  13. Minidave

    Minidave Well-Known Member
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    Looks that way to me - he did complain that it was blowing a pretty good smoke trail and is has substantial crankcase blowby.
     
  14. MCS02

    MCS02 Moderator
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    Years ago when I rebuilt the engine on my Alfa. Shortly after finishing it it spun a rod baring. I couldn’t figure out why. I had put a lot of work into the motor. Duel Webber’s, hot cams, 10:1 pistons, and every thing was balanced. Turned out when a friend was helping me look over the parts trying to figure out what happened he removed one of the caps on the crank to look at the oil passage on the crank. He found a broke pice of a drill bit the machine shop left in the crank. Because of this the oil was not able to flow well enough.
     
  15. Minidave

    Minidave Well-Known Member
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    I'm an old fart....... :)
     
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  16. 00Mini

    00Mini Well-Known Member

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    Other than locating the pistons this build is really going smoothly.
     
  17. Crashton

    Crashton Club Coordinator

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    Stay safe Dave. Work at your own pace & rest when needed.
     
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  18. MCS02

    MCS02 Moderator
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    I hope you feel better Dave.
     
  19. old81

    old81 Club Coordinator
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    Nice looking bit of machine work, glad they are taking it serious at that shop, masks and gloves. Stay safe, get the meds checked, you do not want the covid at our ages. Project is looking good, but you have a lot of other things to mess with too.

    What surgery is planned for January? Forget what you might have written earlier.

    Good grief getting old is a bitch.

    Take care, mask up.
    Don
     
  20. Minidave

    Minidave Well-Known Member
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    Don, right knee is getting replaced finally after 10 years of bone on bone crunchiness!