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marked pistons

I

INCase

Well-known Member
Do most manufacturers mark the pistons when they were assembled into the tractor?

Were most aftermarket kits marked?

How did most of them mark them?

Thanks.
 
If your talking about numbering the rods and rod caps, I never dropped the pan the first time on an engine and found the rods and caps marked. That is the first thing I do or did with a center punch. If your talking about the pistons being marked to show the direction they needed to drop in the block then those are factory marked on the models that it is needed. Not all need to go only one way.
 
On some engines the pistons and rods need to go in a certain way. My dad rebuilt a Farmall C and reversed one of the rods, it eventually broke the crank , luckily not the block. So upon disassembly mark or lay out all the parts carefully.
 
I'm not sure if you mean " tolerance grade" markings or not.
Some companies use close tolerances. So each piston and some cylinders get grade marked as to how close in tolerance they are, plus or minus.
Often found OEM and not often found with aftermarket parts.
 
Not really sure what you mean, but different manufacturers do different things. Some put an arrow on the piston to point to the front of engine. Some flat top pistons doesn't make any difference which way they go. Dome pistons must turn the right way to match the recess in the head.Direct injection diesel pistons must turn the right way for the injector to spray in the right place. If you could explain a litle more maybe we can help.
 
I was reffering to which piston goes with each sleeve or which hole. Took pistons out a year ago and they got moved a time or 2 since then before I got them marked. They're in pairs (1/2 and 3/4) but don't know which is which. They're M&W aftermarkets.

Thanks
 
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