Hi:
I'm rebuilding a 1991 2.5 Liter (151 cu. in) Chevy engine with an "A" type code/ engine.
The new main bearings I bought have the oil hole misaligned with the actual oil supply hole completely. However, the (upper) bearings have about a 1/8 inch wide oil channel/groove cut out in the center which exposes some of the block's oil gallery feed hole. This cutout channel is about an inch or more long in the upper bearing(s) and is centered. It does allow some oil flow but it seems like it might be restricted somewhat
Does anybody know if this 1/8" wide (or so) bearing groove / gap will be sufficient to oil the bearing under all conditions or should I stop and get perfectly aligned bearing hole bearings (i.e. the "correct ones")? I'm leaning towards getting a different bearing set (if possible). I've considered using the old ones but they are looking a little rough and etched a little (though not too bad).
It is possible the supplier confused the "E" type engine with the "A" type since specs for the "A" type are hard to come by (and just maybe the supplier was just "winging it" thinking the specs were the same for both engines (E vs A)).
Thanks in advance for any useful responses.
Ski
Keywords: Clevite 77 (not the supplier BTW) Main bearing oil hole misalignment partially obstructed oil supply hole blocked oil hole bearing blocks oil hole partially bearing oil hole obstruction upper bearing groove partially blocked oil hole S-10 bearing oil hole misalignment