Re: 10-20 engine rebuild question forBOB KERR

Posted by Bob Kerr on February 09, 2002 at 10:05:33 from (205.188.201.144):

In Reply to: 10-20 engine rebuild question forBOB KERR posted by Will@ont.ca on February 09, 2002 at 02:54:00:

Hi Will, when I put the pistons in my 10-20 I poured new motor oil all over the rings and piston sides and also on the sleeves before I put the pistons in. I also just honed my sleeves and like yours, they cleaned up nice execpt for one or two small black dots left in one cylinder which were smaller than the ring width so I figured I would be ok until I decided to resleeve it. (money was the big factor there!)The engine was stiff when I crank it but has loosened up only a tiny bit as I have real good compression from the valve jod that was done.As for the rods, the bump I was talking about is a very light bump with the back side of the hammer handle ( the wood part)and I used a smaller hammer. Rods that are too tight will make it turn over hard and will heat up quick so be sure to recheck it. If smoke comes out of the vent tube it will be too late to save the bearings so now is the time to be sure.It is acually better to have them too loose, than too tight! The engine will let you know if the are too loose by a slight knocking sound, and then you can tighten them up just a touch until the knocking stops. One thing I did was to belt up a Hit and Miss engine to the belt pully and run the short block assembly for a half hour or longer ,before I put on the head, and listened to it and checked the rod ends for heating.If they are warm, they are too tight.Be sure to put on the oil pan and have the right oil in it! I use straight 30 weight in the cool weather and straight 40 weight in hot weather( 85-90 degrees and up).When I ran it on Kerosene and the oil thinned out, I would start to hear a little bit of knocking from the rods, and from what I gather, that is normal when too thin of oil is used! These low RPM engines (1100 max RPM)are not set up the same way as the modern higher RPM engines.Also if you have a 28 or older with no oil filter use Non Detergent oil only and clean out the oil pan yearly.Run it at idle and flush it out with a couple quarts of kerosene in the oil for a few minutes first, then drain it out and wipe the bottom of the pan clean with a lint free rag.You should have seen my oil filter the first oil change! All red from red shop rag lint!Oh well , we learn as we go!Your first oil change if you don't have a filter, should be only 20-30 minutes after you start it, and I would change it after a few hours running after that to make sure those tiny particles from honing and the rings seating get cleaned out.No matter how clean you thing the sleeves are , there is still some particles left and they can get pounded into the rod bearings and stay there forever grinding on the crank.A couple quick oil changes should help get them out of there. Let me know how it goes, Bob

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• Re: Re: 10-20 engine rebuild question forBOB KERR Will@ont.ca 15:14:06 02/09/02 (0)

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