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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Super 55 Engine Issues-Am I Nuts?

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MCL

12-06-2006 16:29:49




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In process of tearing down the engine on the "new" Super 55. It is noisy-sounds like up top. Got the head off and would swear that the pistons are about 1/8" smaller diameter than the cylinder. Not sure because I don't have one pulled out yet. I have side-to-side play as well as front-to-back. It moves around quite a bit. I can feel a pretty well defined wear ridge where the top ring comes to. Could the pistons be worn this much to cause a knock? Surely some ding-dong didn't put too small of pistons in this thing sometime. Seems to me that a piston and sleeve would wear mostly on the sides and not much on the front and back. This is not my first engine work but I have never seen anything like this-so far. This thing did run but had a lot of smoke and blow-by. I only get to work on this thing in between train trips to Decatur IL so watch for updates.

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jake4

12-08-2006 17:26:44




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 Re: Super 55 Engine Issues-Am I Nuts? in reply to MCL, 12-06-2006 16:29:49  
Sounds like the rebuilder could have used the oversized cylinders [3.5 early, 3.5/8 later]. The 3 5/8 liners with the 3.5 pistion would cause this amount of slack, I have never heard of an engine with that much uniform wear. A caliper will tell. Good luck.



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jake4

12-09-2006 06:40:39




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 Re: Super 55 Engine Issues-Am I Nuts? in reply to jake4, 12-08-2006 17:26:44  
If the condition I described you should be the problem. You should be able to just replace the pistons and rings. With the amount of time it has been run a cylinder hone will smooth the sides. When removing the connecting rods make sure the bearings stay in the the same rod. This will increase the displacement to 155 cubic inches. Good luck.



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RAB

12-07-2006 14:42:31




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 Re: Super 55 Engine Issues-Am I Nuts? in reply to MCL, 12-06-2006 16:29:49  
IF you can get an eighth drill bit down the side of the piston, then you have about 125 thou wear, some on the bore and some on the piston?
The alternative is a couple of engines have been used to throw together as one, and you went and bought it! Is the head gasket relatively fresh?
The only thing you can really do now is pick up the tab for a proper rebuild.
Hate to suggest to you that the bottom end is probably in much the same condition. Hope it"s not.....but.....
Regards, RAB

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MCL

12-10-2006 09:00:28




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 Re: Super 55 Engine Issues-Am I Nuts? in reply to RAB, 12-07-2006 14:42:31  
I expected to find engine issues considering the purchase price. I did find silicone sealer around the valve cover but it is old. The dirt and oil on side of engine does not indicate any recent engine work. What, if anything, was done to this engine was a long time ago.



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Kruse

12-06-2006 18:59:48




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 Re: Super 55 Engine Issues-Am I Nuts? in reply to MCL, 12-06-2006 16:29:49  
So is this a freshly rebuilt engine or is this engine being rebuilt for the first time? It might be time to completely disassemble the engine and measure the pistons and the bores.



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MCL

12-10-2006 08:55:37




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 Re: Super 55 Engine Issues-Am I Nuts? in reply to Kruse, 12-06-2006 18:59:48  
There was silicone sealer under the valve cover. It was old. If anything has been done to this engine I think it has been a long time ago.



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