Motor going back together

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Dave1948
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Motor going back together

Postby Dave1948 » Wed Feb 04, 2015 10:17 pm

Been working on for a year now. it is bored .040 over,valves ground and lapped..crank turned .020 on rods and .010 on mains..hoping to hear it run soon..when i bought it there was no compression to get cub running..tried to add pictures but says size too big

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Stanton
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Tractors Owned: 1942 Farmall AV, serial #87025
1945 Farmall H, serial #213,651
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
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Location: Lone Jack, MO

Re: Motor going back together

Postby Stanton » Thu Feb 05, 2015 7:50 am

Try resizing your pictures down to about 640 x 480 size. Several threads on here about this. Here's one:

viewtopic.php?f=1&t=40653&p=336829&hilit=+resize#p336829

Looking forward to seeing your progress.
Stanton
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Bus Driver
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Re: Motor going back together

Postby Bus Driver » Thu Feb 05, 2015 7:53 am

On the main bearing inserts, if half of the insert is grooved and half is plain, the plain part goes into the cap, so it will be on the bottom when running. Typically, the grooved one will be the only one with the oil hole to align with the block hole.
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John *.?-!.* cub owner
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Re: Motor going back together

Postby John *.?-!.* cub owner » Thu Feb 05, 2015 10:24 am

Also don't forget to oil be bearing to crank surfaces when reinstalling, they do not like running dry. Oil cylinder walls, rings, etc. I do NOT recommend packing the oil pump with grease or Vaseline, but have had very good results with wiping a thin layer of grease or heavy oil on the teeth wen reassembling.
If you are not part of the solution,
you are part of the problem!!!

Dave1948
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Re: Motor going back together

Postby Dave1948 » Thu Feb 05, 2015 6:54 pm

20150204_200526.jpg
20150204_200512.jpg
Got a picture to load.Going to paint after i get it running.Currently has etching primer on it. Thanks for responses

Dave1948
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Joined: Sun Aug 25, 2013 7:35 pm
Zip Code: N0N1A0

Re: Motor going back together

Postby Dave1948 » Wed Feb 18, 2015 8:53 pm

Just got motor running for the first time.Sounds good and have lots of oil pressure..Only problem i seem to have is leaking oil out of filter cap..Will have to look at that after work tomorrow..It really feels good to finally have a runner

BigBill
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Re: Motor going back together

Postby BigBill » Thu Feb 19, 2015 12:34 pm

I burnish the cylinder walls, piston skirts, bearings, crankshaft, camshaft, lifters valves and guides with a moly paste. Then I use motor oil when assembling. I soak each piston ring with oil.

If the oil system can be primed do it. If not put some grease in the oil pump so it will have suction and pump the oil right away.

I have a Chevy 350 oil pump with hydraulic hoses driven by a 1/2" drill. One hose attaches to the oil system and the other goes in a gallon of new motor oil. I pre lube and pump up the system before starting.

Oil leaking out your oil cap breather? Did you soak the oil cap in kerosene to clean the breather mesh?

Did you stagger your piston ring end gaps? If there all lined up blow by can occur.

Did you check the ring end gaps or fit them to specs?

Never trust a label on a package for being correct. I double check every new part. Example, I caught the wrong size bearings with the correct size markings before, I trust nothing. Use plastic gauge too.

Sometime I'll post my dealer mechanic experience with a thick headed boss.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

bythepond88
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Re: Motor going back together

Postby bythepond88 » Thu Feb 19, 2015 12:54 pm

Leaking at the filter cover could be several things. It could be that the crush washer where the bolt goes through the cap isn't sealing. If this is the case, the cap itself will fill with oil, then spill over. Mine was leaking there, and I fixed it with a rubber o-ring until I can remember to get the proper crush washer when I'm somewhere where they are sold.

If it's leaking between the cap and the housing, it could either be a warped cap, a bad gasket, or just not tight enough. However, do not overtighten the cap, it doesn't need to be very tight to seal. If it is overtightened, the cap can warp.
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Dave1948
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Joined: Sun Aug 25, 2013 7:35 pm
Zip Code: N0N1A0

Re: Motor going back together

Postby Dave1948 » Thu Feb 19, 2015 8:59 pm

I changed oil filter cap and leak is gone. I am happy with the way it is running now ..Planning on painting it 2150 red this weekend,I will post pictures. Thanks to replies..This forum is full of experience and info


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