BMW S14 B23 Engine Search for: Advanced Search Place Ad Buy & Manage Subscriptions Browse Ads Search Ads BMW S14 B23 Engine Click to enlarge image. Contact Information Contact Seller () Location: Idaho, #1 USA 83704 Price: $ 11,000 City: Idaho falls More Information BMW S14 B23 Engine for sale,Completely rebuilt less than 2,000Km, Bore x stroke 93.4 x 84.0,forged steel crankshaft with 5 main bearings 55mm diameter, big end journals diameter 48mm, 2 overhead camshafts (DOHC) chain driven.