/ The guy that put the engine internals together says "The rings are not seated yet end the smoking is normal. Just give it a couple hours of work"
#71
sportscarclinic
Bronze Member
- Joined
- Aug 10, 2017
- Messages
- 64
- Location
- Portland, Oregon
- Tractor
- Kubota B2150, Kubota 7100, Kubota B7200
For starters, let me say you are "the engine guy" in this scenario.... I am NOT "The Engine Guy"
...The owner wants it done completely and correct. I volunteered to take the project. (not my best decision ever...lol)
Former shop owner here, now a licensed general contractor. A lot of my work nowadays involves bailing out homeowners who thought they could be their own GC, or previously hired someone who was hopelessly unqualified to accept the responsibility of that role in their project, leaving them with a mess on their hands. In that latter case, we almost always end up tearing out the previous work and starting over. You probably see where this is headed.
There are so many red flags here from a professional engine builder's perspective that it's somewhat pointless to start enumerating them. The bottom line is you didn't, and cannot at this point deliver an engine "done completely and correct" without again completely rebuilding the engine.
When you deliver an engine to a machine shop, you must tell them precisely what to do. No reputable machine shop that I've ever used, and that's many, will "do whatever it needs" when you drop off an short block, unless they are being hired to fully perform the rebuild. One operation that was obviously neglected was boring and honing the block to accept oversized pistons. There's very little chance that a hard working tractor engine didn't require as much just from previous age/use wear, but it was certainly required on at least the one cylinder that had a bent rod, which would have caused excessive wear on one side of the cylinder bore making it oval, not round. Replacing the standard size pistons was a waste of money.
Did the engine assembler you hired Plastigage the rod and main journals to check the oil clearance? Probably not. Did you even fit oversize main bearing shells to match the .040 undersize crank?
This is a bad situation for you and your friend, hopefully you can salvage it. I'd recommend looking into buying a rebuilt engine with a warranty. Try JASPER Engines, Inc. The days of cost effectively rebuilding engines are long gone. Qualified machine shop work that's worth what you're going pay (a lot!) is hard to find these days, and usually already way over-subscribed taking care of the shops in the area.
Good luck.
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