Yeah I kept trying to convince myself that maybe it really was the factory build, but the closer I look the more signs of a rebuild:
Stamped BBB - I don't see any local auto or machine shops by that name though?
My attempts to seach the internet are overwhelmed by links to the Better Business Bureau...
More aftermarket markings on the flywheel side of the block:
Disconcerting mark on the snout of the crankshaft. It almost looks like it was welded and reground?
It sort of seems like this sleeve is just below flush. This is the front cylinder that appeared to be blowing pressure into the coolant system (rather than allowing water to enter the chamber like the back blown head gasket cylinder):
The unknowns with this engine kicks my OCD into overdrive so I'm looking forward to outsourcing the final decision to the machine shop. I'll go over my concerns:
- Why did the original engine fail and why did this rebuild fail?
- Are the sleeves at the proper height?
- Have the heads been resurfaced before &, if so, how much will compression & cam timing be affected?
- Are we absolutely sure nothing is cracked? I've never seen a coolant system weep from every gasket at once
- Why did one of the main bearings wear oddly?
- Why did one of the cylinders wear oddly?
- How long did the rebuild last? Most of the bearings & crosshatching look new, but it was full of varnish & carbon.
...And let the experts see if we can do a proper rebuild...