EVO All Evo Model Discussion

Broken Lifter Block

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Old Apr 25, 2021 | 08:41 AM
  #11  
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Was running fine with a slight tick.....but that was all.

Thing is....he really brought the bike in for a cam upgrade. Now all this....

Certainly doesn’t look good....will know more in a few more days after I pull the nose cone.
 
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Old Apr 25, 2021 | 10:00 AM
  #12  
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This one will be fun to watch unfold. At least for us. Hopefully your friend doesn't have a major problem.

I'm really curious to find out what's up here. I'm guessing you'll find that missing chunk lying in the bottom of the cam chest.

But it is really hard to think of what could have caused that break that didn't also cause (or maybe result from) something catastrophic.
 
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Old Apr 25, 2021 | 11:16 AM
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Originally Posted by EVOrider
Was running fine with a slight tick.....but that was all.

Thing is....he really brought the bike in for a cam upgrade. Now all this....

Certainly doesn’t look good....will know more in a few more days after I pull the nose cone.
That slight tick was fixing to be a banging noise for sure.

In the middle 70's IIRC Chevy ended up doing a recall of sorts. Car came in with a funny bumping sound in the motor.
The boss told me start tearing it down till we found something. Got to the crankshaft and lifted the crank out in 2 pieces. It was split under the middle journal.
Chevy paid to put alot of crankshafts in during that, some trashed and some got drove into the stalls.

WP
 
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Old Apr 25, 2021 | 11:44 AM
  #14  
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Originally Posted by EVOrider
It is indeed all factory. He brought in the bike for new lifters, new cam, and to replace the INA with a new Torrington.
So when did the block explode?
It needs to be removed for a cam and lifter change.
I'm missing something no doubt in your description of events.
 
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Old Apr 25, 2021 | 01:18 PM
  #15  
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Somebody dropped it onto the floor...Then installed it.
 
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Old Apr 25, 2021 | 02:10 PM
  #16  
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I meant to add this picture of the lifter with the earlier one. The one that’s screwed up came out of broken piece of the lifter block. It’s seen better days.
 
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Old Apr 25, 2021 | 03:14 PM
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This situation will be something to remember for the coffee shop in the mornings.
Jeeeez

WP
 
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Old Apr 25, 2021 | 05:40 PM
  #18  
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Got back on it this afternoon.....

No big chunks and no visible damage to cam or any gears. There was just a few tiny grey shavings mixed with the oil.

Went ahead and installed the new Torrington.

My question.....What next? No big chunks...could it gotten ground up enough and caught in filter?

Check the oil pump?




 
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Old Apr 25, 2021 | 05:49 PM
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I'd sure want to ck the pump and lifter screen if I'm saying that right.

Some folks have all the luck

WP
 
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Old Apr 25, 2021 | 05:51 PM
  #20  
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Lifter screen was super clean.....
 
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