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1950 Ford 8n engine rebuild

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mikewood869
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PostPosted: Sat Dec 14, 2019 7:35 am    Post subject: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

We're in the middle of rebuild this motor with cast sleeves. Seems like someone was in there before us. Three of sleeve that came out took at least two minutes minimum, cylinder # 3 took 30 seconds. This block is bare as it gets (there's still the oil tub in the block besides the paint on the outside).
 
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mikewood869
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PostPosted: Sat Dec 14, 2019 7:37 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote




 
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mikewood869
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PostPosted: Sat Dec 14, 2019 7:37 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote




 
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mikewood869
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PostPosted: Sat Dec 14, 2019 7:38 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote




 
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mikewood869
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PostPosted: Sat Dec 14, 2019 7:43 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

In the last post was a picture of the middle main bearing.



We though the sleeve was cracked, but we didn't see anything.
https://www.youtube.com/watch?v=RQKoPkWEIU8&feature=youtu.be

https://www.youtube.com/watch?v=RQKoPkWEIU8&feature=youtu.beSleeve removel
 
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PostPosted: Sat Dec 14, 2019 9:33 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

Great pics thanks for showing. I watched the video of you taking out the sleeve too.
 
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Btzj02
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PostPosted: Sat Dec 14, 2019 10:12 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

Keep sending up dates. I would like to do a engine rebuild next winter so I need to build my confidence until then. The information on this forum is invaluable to a first time 8N owner like me!
 
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Hobo,NC
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PostPosted: Sat Dec 14, 2019 8:02 pm    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

Before you put the timing cover back on helicoil the bolt holes where the oil pan bolts to the timing cover...
 
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mikewood869
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PostPosted: Sat Dec 14, 2019 8:15 pm    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

The crankshaft is hopefully this week sometime. We still need to clean it and take measurements of everything. I ended up buying a overhaul kit a while ago, but I can t remember for what 8n engine (we have another block that has cast sleeves and a third block that had steel sleeves). Just curious, why would you helicoil the bolt holes for the oil pan? Nothing stripped out yet (knock on wood).
 
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TheOldHokie
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PostPosted: Sun Dec 15, 2019 3:11 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

mikewood869 wrote:
(quoted from post at 00:15:56 12/15/19)Just curious, why would you helicoil the bolt holes for the oil pan? Nothing stripped out yet (knock on wood).


I believe Hobo is talking about the bolt holes in the aluminum cover and basing that on experience. The female threads in the aluminum timing cover are notorious for failure.

Installing steel thread repair inserts in threaded holes in non-ferrous components is a proactive way to strengthen the female threads. Common examples of this practice are the manufacture of new aluminum cylinder heads (spark plug holes) and aircraft components where repeated fastener assembly/disassembly is known to cause failure.

TOH
 
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Hobo,NC
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PostPosted: Sun Dec 15, 2019 10:29 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

TheOldHokie wrote:
(quoted from post at 17:11:59 12/15/19)
mikewood869 wrote:
(quoted from post at 00:15:56 12/15/19)Just curious, why would you helicoil the bolt holes for the oil pan? Nothing stripped out yet (knock on wood).


I believe Hobo is talking about the bolt holes in the aluminum cover and basing that on experience. The female threads in the aluminum timing cover are notorious for failure.

Installing steel thread repair inserts in threaded holes in non-ferrous components is a proactive way to strengthen the female threads. Common examples of this practice are the manufacture of new aluminum cylinder heads (spark plug holes) and aircraft components where repeated fastener assembly/disassembly is known to cause failure.

TOH


Whut TOH said BTDT got the t-shirt...
 
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mikewood869
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PostPosted: Fri Dec 20, 2019 6:58 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

Anyone know what sleeves would give out the most HP? The old sleeves were cast and we might be getting pistions.
 
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mikewood869
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PostPosted: Sat Dec 21, 2019 6:58 am    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

Ended up getting the block back. Now the block will take a Ford model A valve seat. The original camshaft to this block seemed to be out of spec, so we ended up pulling a camshaft out of a different 8n engine (side mount) and got lucky with that. The crankshaft is also within spec too. I ended up with the wrong engine overhaul. This kit has the .40 sleeves and I needed the .90 sleeves (New Holland wants $85 each sleeve, got them for $35 for each sleeve). We might need new crank bearings and the valves might get redo over if I'm missing anything.


Valve seat done


Crankshaft cleaned


Camshaft being cleaned to check spec (looked great after being cleaned
 
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Hobo,NC
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PostPosted: Sat Dec 21, 2019 12:50 pm    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote

mikewood869 wrote:
(quoted from post at 20:58:39 12/20/19) Anyone know what sleeves would give out the most HP? The old sleeves were cast and we might be getting pistions.


Bore is the same on either sleeve...
 
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mikewood869
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PostPosted: Sat Dec 21, 2019 4:50 pm    Post subject: Re: 1950 Ford 8n engine rebuild Reply to specific post Reply with quote


Thank you, does anyone happen to know what grade the nut are that go onto the rods? Are the grade 8's?
 
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