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Blown Head Gasket?

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Old Nov 14, 2017 | 06:11 AM
  #41  
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I ran out of time when I pulled the head so I didn't have a chance to thoroughly check them out, but a couple quick checks with the straight edge looked good. I plan to check them out more thoroughly when I have time. Anybody know a good way to clean the excessive carbon off the pistons without removing them?
 
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Old Nov 14, 2017 | 01:43 PM
  #42  
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WD-40 and a Scotchbrite pad.
 
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Old Nov 15, 2017 | 05:05 PM
  #43  
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Had some time to clean up the head and take a closer look today, removed some carbon build up and noticed some marring around the #2 cylinder.




Then noticed this guy in the cam chain recess on the side of cylinder #4. I'm no expert, but that doesn't look normal to me...




Also noticed a lot of marks that appear to have come from the cam chain, is that typical?

 
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Old Nov 15, 2017 | 09:49 PM
  #44  
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Is that a crack in the head that goes right into the cooling jacket?
 
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Old Nov 16, 2017 | 03:38 AM
  #45  
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Wow. That motor is fu%@ed. Bummer. So sorry man.
 
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Old Nov 16, 2017 | 04:18 AM
  #46  
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Originally Posted by 74demon
Is that a crack in the head that goes right into the cooling jacket?
Yes, I believe it is. I need to try pouring some water into the cooling jacket to see if it comes out there. What would cause that???

Can I throw on a replacement head or am looking at a wasted engine?
 
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Old Nov 16, 2017 | 05:45 AM
  #47  
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Chances are any head you buy will be attached to a motor already. And as long as you buy from a trustworthy source, that's a good thing. Considering what I see there, I'd have a rough time trusting anything on that bottom end. One good solid chunk of crud making its way to a rod or crank bearing and you'll be doing this all over again.
 
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Old Nov 16, 2017 | 06:20 AM
  #48  
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Originally Posted by EchoWars
Chances are any head you buy will be attached to a motor already. And as long as you buy from a trustworthy source, that's a good thing. Considering what I see there, I'd have a rough time trusting anything on that bottom end. One good solid chunk of crud making its way to a rod or crank bearing and you'll be doing this all over again.
That's a good point, I do see a few complete heads listed on ebay but I would hate to do this all over if there is more damage deeper in the engine. I've been looking at complete engines on ebay and I saw a complete running unit for $500 local pick up, just not sure if it's worth it/ I want to drop that kind of money on this thing. I still need to get new race plastics for it so at that point I feel like I've got more into than what it's worth. I'm leaning towards parting out to recoup my $400 at the moment.
 
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Old Nov 18, 2017 | 03:38 PM
  #49  
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Well, I am looking for some F3 forks to update my F2... In any event, I'd be taking that one apart just to see WTF happened.
 
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Old Nov 18, 2017 | 05:10 PM
  #50  
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Originally Posted by EchoWars
Well, I am looking for some F3 forks to update my F2... In any event, I'd be taking that one apart just to see WTF happened.
I’ll send you some details on them. I do plan on tearing the motor down, good learning experience!
 
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