Seized No one main bearing, But also found this |
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Seized No one main bearing, But also found this |
jeffdon |
Jul 14 2013, 12:12 PM
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#1
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Senior Member Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None |
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OCD Performance |
Jul 14 2013, 01:21 PM
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#2
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Newbie Group: Members Posts: 10 Joined: 10-July 13 From: Canada Member No.: 16,112 Region Association: None |
The thrust bearing on the cam shaft lost one of its flanges? WTF? How does this happen? Anyone seen this? Maybe some extra metal from the failure got into my main bearing? Some Questions 1) the thrust edge that broke, what end of the motor was it? oil pump or flywheel? 2) did you use double thrust for this build? 3) what cam? who made it? 4) what oil pump? could you have used the melling that requires trimming? did you do the extra o ring seal? 5) did you mock this motor up with the cam /crank without the gear set to make sure it spins free before final assy? 6) did you check cam end play before final assembly? (thrust clearance) 7) what tweaked you to tear the motor down? better photos of the back side and bearing surface please. Cheers Mike (IMG:style_emoticons/default/driving.gif) |
jeffdon |
Jul 14 2013, 02:09 PM
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#3
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Senior Member Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None |
The thrust bearing on the cam shaft lost one of its flanges? WTF? How does this happen? Anyone seen this? Maybe some extra metal from the failure got into my main bearing? Some Questions 1) the thrust edge that broke, what end of the motor was it? oil pump or flywheel? Oil pump side. 2) did you use double thrust for this build? The front cam bearing had one half with flanges each side. 3) what cam? who made it? Web Cam 494. 4) what oil pump? could you have used the melling that requires trimming? did you do the extra o ring seal? Shadeck, good fit on the drive tang. No o-ring. 5) did you mock this motor up with the cam /crank without the gear set to make sure it spins free before final assy? Sure did. Then put about 8000 miles on it. 6) did you check cam end play before final assembly? (thrust clearance) How do I do this? 7) what tweaked you to tear the motor down? AFter running this for almost a year, one plug wanted to back out. Pulled the head, had the plug hole welded up and recut. On start up after putting it together, no one main bearing seized after just a few cranks, and some coughing and sputtering, it did not run or rev. better photos of the back side and bearing surface please. Cheers Mike (IMG:style_emoticons/default/driving.gif) |
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