ACL BMW E30 M3 S14B20/23/25 I4 Connecting Rod Bearing Set (Size STD) 4B1568H-STD

S14B20/23/25 I4 Connecting Rod Bearing Set from ACL, listed for the BMW E30 M3. Engine bearings let the crankshaft and rods spin on a thin film of oil.

Specifications

• Brand: ACL
• Part type: Bearing set

Fitment for the BMW E30 M3

Listed for the BMW E30 M3. Check your year, model and trim against the title before you order.

What it does

Bearing size depends on whether the crankshaft has been ground, so measure before ordering. Using the correct part for your exact engine keeps oil pressure, sealing and timing where the engine was designed to run, and doing related parts at the same time saves taking it apart twice.

Installation & tips

• Check clearances with plastigage or a micrometer, and use assembly lube on every bearing.
• Oil pump: Often replaced together.
• Gasket set: The engine comes apart for bearings.
• Work on a cool engine with the vehicle secured, and use a service manual for your vehicle for torque specs and procedures.

FAQ

Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.

What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.

Before you order

• Confirm your year, make, model and trim match the fitment listed above (BMW E30 M3).