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Farmall & IHC Tractors Discussion Forum
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Assembly lube or 50wt oil?

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Slappy

02-09-2005 04:33:37




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What do you all like to use when reassembling a rebuilt engine? Different sources make different suggestions - regular 10W-30, 50wt, and assembly lube are often suggested. A few people suggest packing the oil pump with vaseline or assembly lube to get faster oil pick-up on starting. What do you guys recommend?

Thanks for all of your advise.




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dr.sportster

02-09-2005 11:53:39




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
I use Torco engine assembly lube which I suspect is just an expensive quantity of synthetic oil so I dont get any in the bores.For the cylinder bores and pistons I use the oil that the manufacturer specs for that motor.During the course of asembly I also use copper never seize,red and blue and green loctite,teflon paste, axle grease,but never,ever silicone sealer.



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dr.sportster

02-09-2005 12:43:56




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 Re: Assembly lube or 50wt oil? in reply to dr.sportster, 02-09-2005 11:53:39  
Very importantproduct I forgot to mention;I heavily coat all camshafts with a very heavy moly paste of unknown brand.It is way thicker than any regular type grease.



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KIP

02-09-2005 10:57:47




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
We use a produce called UltraChem Assembly Fuild #1 on turbine engines, transmissions, fuel and hydraulic components. Disolves in mineral and synthetic based lubricants and fuel.



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Theman

02-09-2005 10:38:52




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
The oil pump inlet on your H engine is below the operating oil level so the pump will self-prime when you fill it. Packing an H oil pump full of grease just gives the pump something to push through the new bearings ahead of the oil. A good assembly oil is really all you need. Take Bob M."s advice and build some pressure by cranking the engine before putting in the spark plugs.



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Opa A

02-09-2005 10:09:23




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
I seem to be stuck on 50/50 of 30wt oil & STP. Detroit Diesel recommended it in their service manuals. Same mixture in the oil pump will also insure it primes fast at startup. But be careful not to get it on bolt threads, its too slippery and bolts will break before they reach full torque, found that out the hard way. I use straight 30w oil on threads.



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El Toro

02-09-2005 07:38:47




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
I always used the procedure that "janicholson" uses and has described and never had an engine failure with tractors, cars or truck engines. Hal



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Tailhunter

02-09-2005 07:36:41




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
How do you spell rebuild..... LUBRIPLATE.....



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Bob M

02-09-2005 06:56:25




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
Slappy - I’ve had good luck using lithium based grease as an assembly lube. Simply apply a film to all bearing surfaces before assembly. I also apply a film to the oil pump internals if the pump has been disassembled. (If the pump has not been taken apart simply pour some motor oil into the pump inlet then turn the shaft by hand until oil appears at the outlet to wet the pump internals).

Then before starting the engine the first time I prelube it by: 1 – Squirting an ounce or two of motor oil into each spark plug hole then, 2 – Cranking the engine with the plugs out until the gage indicates a few lbs of oil pressure. (Keep away from the plug side of the engine when you do this – it’ll fling some of the oil back out the plug holes as it’s being cranked!)

Now install the plugs and fire it up. You will be rewarded with plenty of thick, blue exhaust to delight your wife and the neighbors until the oil gets burned out of the cylinders!

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scott#2

02-09-2005 06:04:04




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
If it will be running within a day after final assembly, use a smear of moly and motor oil or stp oil treatment with moly. Lucas oil stabilizer is also a fantastic assy lube additive to use with moly. Use it on all bearing surfaces and crank/rod journals with moly. Apply a liberal smathing of moly to the cam lobes and lifter faces. No need to pack the pump (as long as its within spec) for fast pick up if you use moly on all journal surfaces and cam. An engine assembled with moly will run for about 7 minuites with no oil. (found this out the hard way) If you dont have pressure by then, well you know... Use the regular motor oil that you plan on using to run with everywhere else.

Dont run Lucas oil stabil during break in period, that stuff is so viscious that rings wont get a chance to seat properly and the bores will glaze. If you get some lucas stabil, try drawing it between your thumb and gorefinger and watch how it strings out, pretty tuff stuff.

scott#2

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rebuilder

02-09-2005 05:11:03




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 Re: Assembly lube or 50wt oil? in reply to Slappy, 02-09-2005 04:33:37  
Slappy:

I would say that depends on how quickly you are going to get everything together and running. If you assembled the engine in a couple of days I think gear oil would work fine for startup. Anything longer though I would use the rebuilder's grease(Lubriplate). Cheap Insurance.



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tractorptsguy

02-09-2005 05:31:00




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 Re: Assembly lube or 50wt oil? in reply to rebuilder, 02-09-2005 05:11:03  
I always use STP but I know everything under the sun has been used successfully. The key to putting one together right has been and will be cleanliness. It won't rub much if you put one together dry. Let a little crud get in there and all the lube in the world won't help.



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janicholson

02-09-2005 06:27:53




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 Re: Assembly lube or 50wt oil? in reply to tractorptsguy, 02-09-2005 05:31:00  
From experience, and strong instruction from a person who was and indy racer engine prep man in the mid fifties, the key has two parts 1) use moly/oil, or lubriplate assembly grease liberally on all contact surfaces except rings cyl wall (use intended breakin oil when installing pistons. 2) charge the system with breakin oil prior to starting. Using a cheap rotary drill pump with the intake tube pulling from a bottle of oil is successful. even a pump type oil can into a rubber adapter (chunk of small hose) and pumping oil into the gallery for 10-15 min would work. On engines with a distributor driven oil pump (not letter series farmalls), I use an extended shaft, and drive the oil pump until the pressure gauge indicates a few pounds. this never fails.

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