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AllisD17AndyOk 
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Joined: 06 Apr 2020
Location: Colbert, OK
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 Topic: d17 LPG overhaul problems
Posted: 16 Apr 2020 at 12:05am |
Broke down my D17 series 1 couple days ago, and found a couple of problems with it...  This a view of sleeve one looking down from top. The wrist pin had been installed correctly, but put in the sleeve backward, enabling the pin to drag the sleeve wall, scoring it badly, but I intended to replace all sleeves anyway. The next picture is my main problem now....  When I removed the crankshaft main caps, the center one is supposed to be in one piece, not two...does anyone know where I can get another center main cap, it has the thrust bearing? Will I have to line bore the block now? Thanks Andy
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MACK
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Joined: 17 Nov 2009
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Posted: 16 Apr 2020 at 7:06am |
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Yes, it will need line boarded. MACK
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DrAllis
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Posted: 16 Apr 2020 at 7:33am |
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Find a different block or complete engine.
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Burl
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Posted: 16 Apr 2020 at 7:39am |
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Thats the pits ! I agree with DrAllis .
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Lynn Marshall
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Posted: 16 Apr 2020 at 7:44am |
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I've got an early series bare block that I would sell. $200.00. Central Iowa location.
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Brian G. NY
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Posted: 16 Apr 2020 at 8:33am |
 DrAllis wrote:
Find a different block or complete engine. |
Doc,
Just curious.....why another block......you think this one is damaged as a result of the broken main bearing cap?
Or, maybe the chances of finding just the cap may be futile?
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AllisD17AndyOk
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Posted: 16 Apr 2020 at 2:23pm |
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Brian, I suspect Dr. Allis doesn't thing I should spend $400 plus dollars line boring my block. Lynn has offered me a block for $200 (Thanks, Lynn, for the offer), but he's a 10 and half hour drive away one way and I think it would be cheaper to line bore...still looking for options. Andy
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DrAllis
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Posted: 16 Apr 2020 at 3:39pm |
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When a cap looks like that, what do the mating surfaces on the block look like with the cap moving around?? How about the stress that has been put on the threaded main cap bolt holes?? You cannot buy a new cap from AGCO. Who would want sell a main cap from a perfectly good used block?? No One. I am fortunate to be able to find a block within an hour of home if I needed one.
For all you know your crankshaft may be cracked or worn beyond undersized bearing limits.
Edited by DrAllis - 16 Apr 2020 at 3:40pm
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Brian G. NY
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Posted: 16 Apr 2020 at 4:08pm |
DrAllis wrote:
When a cap looks like that, what do the mating surfaces on the block look like with the cap moving around?? How about the stress that has been put on the threaded main cap bolt holes?? You cannot buy a new cap from AGCO. Who would want sell a main cap from a perfectly good used block?? No One. I am fortunate to be able to find a block within an hour of home if I needed one.
For all you know your crankshaft may be cracked or worn beyond undersized bearing limits. |
So.....I guess for both of the reasons I mentioned.
I know even cast iron can be stressed and warped under the right conditions.
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AllisD17AndyOk
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Posted: 21 Apr 2020 at 12:44am |
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Lynn, I sent you a private message...Andy
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rw
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Posted: 21 Apr 2020 at 4:53am |
What do you mean when you say "put the sleeve in backwards"? No doubt it is in pretty bad shape.
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CTuckerNWIL
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Posted: 21 Apr 2020 at 6:12am |
rw wrote:
What do you mean when you say "put the sleeve in backwards"?No doubt it is in pretty bad shape.
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It's not the sleeve that was put in backwards, since there is no way to do that. The piston put in with the rod facing the wrong way is what was backwards.
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Lonn
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Posted: 21 Apr 2020 at 6:20am |
rw wrote:
What do you mean when you say "put the sleeve in backwards"?No doubt it is in pretty bad shape.
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I think he means the piston/rod assembly was put in backwards. I think the wrist pin was installed wrong myself because if it was right, I don't think the rod would bolt up to the crank without prying it in place. I've seen this before, in fact when I was a teenager, my very first overhaul I did to my WD, after Dad gave it to me with a stuck engine, I put the pins in wrong, centered in rod, and scored two sleeves. Lesson learned to get a book.
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AllisD17AndyOk
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Posted: 21 Apr 2020 at 9:50am |
Thanks Tucker and Lonn for explaining it for me. Lonn, I'm gonna have to have the machine shop check the rod and see if it is straight...you guys won't believe all the things I'm finding on this project...and it's rapidly becoming a real project... 
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