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Old 07-25-2006, 11:21 PM   #1
sketron13
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Default Silk thread in between crankcase halves...

So I'm in school to work on airplanes, and tonight we tore apart some 540 cid 6-cylinder Lycoming reciprocating engines. These engines use a thin layer of adhesive in combination with a single silk thread on the mating surfaces. Here's my question, does anyone know what Subaru uses to join the crankcase halves?
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Old 07-26-2006, 12:18 AM   #2
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Fujibond....
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Old 07-26-2006, 11:11 AM   #3
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Quote:
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Fujibond....

Hai!
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Old 07-26-2006, 11:37 AM   #4
sketron13
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Fujibond? I reckon they just use glue then...
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Old 07-26-2006, 11:39 AM   #5
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At least it was a lycoming and not continental....
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Old 07-26-2006, 07:37 PM   #6
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My shop is hiring if your near CT. I work for Bombardier Aerospace.
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Old 07-26-2006, 11:17 PM   #7
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That would be awesome but I'm in ATL right now. Really want to go to Alaska and work... Bombardier, so you work on Learjets or do you manufacture them?

Oh, and it was an IO-470 D, not a 540.
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Old 07-26-2006, 11:35 PM   #8
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so it was a conti? And to get back on topic, Yes, subaru uses a grey goo around the perimeter of the crankcase halves.
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Old 07-26-2006, 11:37 PM   #9
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I was told by SOA that they use gorilla glue.
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Old 07-27-2006, 12:17 AM   #10
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It's just a silicon sealant... Fujibond = Yamabond = Hondabond = Grey RTV pretty much. For the oil channels and whatnot, they use o-rings, though.
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Old 07-27-2006, 12:30 AM   #11
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Alright, I'm glad I asked now.
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Old 07-28-2006, 11:12 PM   #12
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so how do you break the case halves apart?
screwdriver and hammer?
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Old 07-29-2006, 12:51 AM   #13
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Can't do that on aluminum without messing it up. I just pulled real hard on the mag. holes and pulled her apart. You gotta have someone there to catch the cam and a gear.
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Old 07-29-2006, 12:34 PM   #14
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While I was splitting junk blocks, I found that using a small bottle jack across the backside of the motor worked pretty good. Very little, if any damage, too. I imagine with a few wooden blocks, you could do it without a sign of using force. I just used it to crack the rearside apart, the rest comes along pretty easy, but (again) I used force to pry it apart just to make it easy, but that usually marked up the two sections of case from prying.
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Old 07-31-2006, 08:39 PM   #15
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Quote:
Originally Posted by 8Complex
While I was splitting junk blocks, I found that using a small bottle jack across the backside of the motor worked pretty good. Very little, if any damage, too. I imagine with a few wooden blocks, you could do it without a sign of using force. I just used it to crack the rearside apart, the rest comes along pretty easy, but (again) I used force to pry it apart just to make it easy, but that usually marked up the two sections of case from prying.
sweet! that is an awsome idea.
i'm off too the bat cave!
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