I finally have some time to start on my long awaited Cosworth 2.3L Duratec rebuild. I bought an engine that came from a CSR260 which had spun a rod bearing on #2 cylinder. It looks like low oil was the cause. For reference, it's a base CSR260 engine, consisting of:
Cosworth 12.0 CR forged pistons
Cosworth rings
Cosworth/Carillo rods
Cosworth HD oil pump
Cosworth/Titan internal 2 stage dry sump
Modine oil cooler, High flow fuel injectors and rail
Cosworth CNC head (not the race extruded full CNC head)
Cosworth 2nd stage cams, race valve springs
Cosworth light weight flywheel
Cosworth/Caterham 2 piece roller barrels
Some pics to start


I started disassembly right away to see what else was damaged and needs replacing

Here is the big end of #2, you can see it scored the journals on the crankshaft:

The other rod bearings were about to fail as well

Took the head apart:

Quite a bit of carbon deposit for 9000 miles, although probably 50% of it were hard track miles:

Pistons were a bit dirty with some debris on it, but not bad overall:
Cosworth 12.0 CR forged pistons
Cosworth rings
Cosworth/Carillo rods
Cosworth HD oil pump
Cosworth/Titan internal 2 stage dry sump
Modine oil cooler, High flow fuel injectors and rail
Cosworth CNC head (not the race extruded full CNC head)
Cosworth 2nd stage cams, race valve springs
Cosworth light weight flywheel
Cosworth/Caterham 2 piece roller barrels
Some pics to start


I started disassembly right away to see what else was damaged and needs replacing

Here is the big end of #2, you can see it scored the journals on the crankshaft:

The other rod bearings were about to fail as well

Took the head apart:

Quite a bit of carbon deposit for 9000 miles, although probably 50% of it were hard track miles:

Pistons were a bit dirty with some debris on it, but not bad overall:

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