This S14B23 inline-four was removed from my 1989

BMW M3 and commissioned a rebuild that included

boring the block to 94mm and painting the inside of

the block with Glyptal. A replacement crankshaft

was ground 0.010? before being installed together

with new bearings, forged IE H-beam rods, Carrillo

pistons, ARP hardware, and a baffled oil pan. The

cylinder head was refinished, and a Cometic

cylinder head gasket was fitted. New timing

components include the chain, rails, tensioner, and

hardware. The exhaust camshaft was replaced by a

BMW Motorsports unit, and a new distributor was

sourced. Also included in the sale are a wiring

harness, airbox, ECU, starter, exhaust manifold,

MAF, flywheel, fuel rail, fuel injectors, and more.

The 2.3L BMW S14 inline-four features dual-overhead

camshafts and two throttle assemblies with two

butterfly plates each. The catalyst-equipped S14B23

produced 192 horsepower and 170 lb-ft of torque.

Asking price $8,000