Posted by Steve@Advance on August 29, 2018 at 08:31:16 from (24.182.105.179):
In Reply to: Re: Engine troubles... posted by Valiant Farmer on August 29, 2018 at 05:48:03:
I would look into the spare.
With the problems you describe on the first engine it may not be economically feasible to rebuild.
If both engines are the same you can select the best of both.
The pistons and liners are sold as matched sets, the piston sized to the liner bore. Depending on how worn they are determines if they will be replaced, generally they are for a working tractor. If this is a parade/show tractor you can get by with some wear as long as they are not rust pitted or scored too badly.
The crank, it will need to be miked and evaluated. But you can bet the one that has the spun bearings is not repairable short of welding it up, which is not a real good practice. Hopefully the spare engine will have a good crank. But it will still need to be measured and evaluated. If not worn too badly it may polish out, or can be turned to an acceptable undersize. Again, these are areas that need to be done by a pro unless you have the equipment and experience.
The block needs to be checked too, those have a history of cracking in the web between the cylinders. Also if any main bearings spun it will need to be align bored, an expensive job.
The rods will also need to be checked. Again, pick the best from the spare engine. The ones with bad bearings will need to be reconditioned.
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