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Allis Chalmers Discussion Forum
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Rebuilding the engine-lubricant??

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Guyzoo

12-05-2005 06:14:35




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Hi guys, I am ready to rebuild the engine of my WD. I have it on an engine stand and it will not go until next summer before I put it in the tractorto fire it up. My question is: what lubricant should I use on the bearings,piston rings etc. I am scared that lubricant like 10w30 will not stay on bearings and when I will start it up, it will seize up
any opinion will be very appreciated
THANKS

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BCnT

12-06-2005 05:39:10




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
i like STP and white lithium grease on bearings,cam,and lifters but i've had problems getting rings to seat if i coat cylinder walls...if engine is going to sit awhile i'd use gun oil on cylinders...i been using WD40 on cylinder walls during assembly and right before i lite it off first time...rings seat as soon as it fires.



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Dan McClure

12-06-2005 01:18:55




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
I only use white lithium grease preferably in spray can never had a problem it stays put and dont run off.



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Chris(WA)

12-05-2005 21:45:12




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
Go with the assembly lubricant instead of STP if the engine will sit a long time before you start it. STP will run down out of the bearings like motor oil after sitting for an extended period. The assembly grease will stay on the surfaces much longer. Pumping the oiling system with an external source just before starting it is an excellent idea also. That way you get oil immeadiately as soon as the engine turns over instead of there being a time without oil flow as the oil system purges.

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wdtom

12-05-2005 17:31:54




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
I wasn't aware of assembly grease, might be the thing to get. The traditional lube is 50/50 engine oil and STP. Bearings and rings. If you are concerned because of the long period of time between assembly and start up, you could squirt a few squirts of oil in each cylinder before startup. Possibly feed some oil under pressure into the oil system through the external oil lines. I don't think I would worry though as long as you coat things well with an assembly lube, or grease at assembly.

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Guyzoo

12-05-2005 13:28:36




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
Thanks guys, I didn't think about STP. I will go buy a bottle tomorrow.
THANKS AGAIN



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parrothead

12-06-2005 06:35:42




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 13:28:36  
Just remember -- DON'T use STP on the cylinder walls! You'll have trouble turning over the engine on the stand. That stuff is STICKY! Especially when it is cold.



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old

12-05-2005 15:01:14




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 13:28:36  
I just rebuilt a Koler 14HP engine a month ago useing STP. It smoked good for about 2 minutes when I fired it up but I did have the rings, piston and cylinder wall covered with it. This engine was bored, new piston rings and the crank was also turned 10 under so I wanted to make sure it was done right. Still doesn't have the first 5 hours on it. Need to run it about 30 minutes more then I'll be changeing the oil. Its in a Bobcat 731 neat little toy

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Butch(OH)

12-05-2005 12:52:22




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
A thick lube is great for bearings as it stays put until you start it up. Lubriplate engine assembly lube is standard around assembly shops. STP or other oil burner magic will also work. For the rings and cylinder walls 30Wt is good. No need to get carried away with the amounts. Too much thick stuff will also impeed oil flow once you do start it and that isnt any good either.



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old

12-05-2005 08:15:55




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
I've used the same thing one engines for 30 plus years and never had any problems. I use STP oil treatment. I will not even touch any part till I have coated my hands with the stuff. Then on al parts I put a good bit of it on and put the parts where they need to go. What I like about it is that its thick and stays where you put it for a long time and is very slick so you never have a dry start. I've found it to be better the the engine assembly grease you can buy

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Bob

12-05-2005 06:57:57




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 Re: Rebuilding the engine-lubricant?? in reply to Guyzoo, 12-05-2005 06:14:35  
That's simple! Engine assembly grease, which is a light lithium grease formulated just for that putpose. Ask for it at your local auto supply store.



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