BMW Internal Engine Parts for BMW 3 Series F31 (2014+)

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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CTA Tools BMW Flywheel Holder - N20/N26 2.0L
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTA Tools - Corporate Logo
T#:584148
Part#: CTA2801
In Stock
$ 80.57 USD
Free Shipping
$ 80.57 USD
Free Shipping
Used for securing the crankshaft with the transmission installed(connected to engine)
WPC-Treated Performance Rod Bearing Installation Kit - B46 / B48 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:36066270
Part#: B48-WPC-RBKT2
In Stock
Sale - Save 25% $ 551.99

This product was last offered at the strikethrough price on
05-03-2026

$ 413.62 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 551.99

This product was last offered at the strikethrough price on
05-03-2026

$ 413.62 USD
Free Shipping on orders $49 and up

If your engine has higher mileage, don't neglect rod bearing replacement! These bearings are sandwiched between the connecting rod and crankshaft journal and are prone to failure due to overheating, lack of lubrication, or general wear. Replace your rod bearings and prevent a spun bearing.

Starting with ACL’s high-performance bearing shells, our Race Series bearings are built to withstand extreme RPMs and stress. Utilizing a "Duraglide" tri-metal construction and a high-strength overlay plate, these bearings offer superior oiling and heat resistance for high-RPM operation.

Our WPC-treated bearings take ACL’s already impressive design and enhance it even further. The WPC treatment process strengthens and smooths the bearing surface by firing high-speed, ultra-fine particles at the bearing shells, reducing friction and improving durability. This advanced surface treatment ensures smoother operation and improved heat dissipation, which are critical for any high-performance engine.

Kit includes:

Turner Motorsport WPC-Treated Race Series Rod Bearing Shells (8) Genuine BMW Connecting Rod Bolts (8) Assembly Lube (4 oz.)

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Plastigage Set
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTA Tools - Corporate Logo
T#:640925
Part#: CTA2450
In Stock
$ 9.27 USD
Free Shipping on orders $49 and up

Plastigage Set is an essential tool for accurately measuring the clearances of engine rod and main bearings without the need for expensive micrometers. This set is ideal for ensuring proper engine assembly by helping you choose the correct size replacement bearing inserts. Designed to cover all automotive engines, the Plastigage Set provides precise measurements to maintain optimal engine performance.

  • Accurate Measurements: Measures clearances of engine rod and main bearings, ensuring proper fitment.
  • Cost-Effective: Eliminates the need for expensive micrometers, offering a budget-friendly solution.
  • Universal Application: Suitable for all automotive engines, making it versatile for various applications.
  • Complete Set: Includes sizes .001" - .003" (green) and .002" - .006" (red) to cover a wide range of measurements.
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WPC-Treated Performance Rod Bearing Service Kit - N20 / N26
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:36066264
Part#: N20-WPC-RBKT2
In Stock
Sale - Save 8% $ 831.99

This product was last offered at the strikethrough price on
05-03-2026

$ 766.05 USD
Free Shipping on orders $49 and up
Sale - Save 8%
$ 831.99

This product was last offered at the strikethrough price on
05-03-2026

$ 766.05 USD
Free Shipping on orders $49 and up

If your engine has higher mileage, don't neglect rod bearing replacement! These bearings are sandwiched between the connecting rod and crankshaft journal and are prone to failure due to overheating, lack of lubrication, or general wear. Replace your rod bearings and prevent a spun bearing.

Starting with ACL’s high-performance bearing shells, our Race Series bearings are built to withstand extreme RPMs and stress. Utilizing a "Duraglide" tri-metal construction and a high-strength overlay plate, these bearings offer superior oiling and heat resistance for high-RPM operation.

Our WPC-treated bearings take ACL’s already impressive design and enhance it even further. The WPC treatment process strengthens and smooths the bearing surface by firing high-speed, ultra-fine particles at the bearing shells, reducing friction and improving durability. This advanced surface treatment ensures smoother operation and improved heat dissipation, which are critical for any high-performance engine.

Kit includes

Turner Motorsport WPC-Treated Race Series Rod Bearing Shells (8) Hardware for Oil Pan & Oil Sump Oil filter Liqui-Moly Molygen 5W-40 (6L) Drain Plug Turner Motorsport Oil Reminder Sticker Oil pan gasket RedLine assembly lube (4 oz.)

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BMW Crankshaft Front Oil Seal Installer - B37, B47, B48, B57, B58, N4...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTA Tools - Corporate Logo
T#:640831
Part#: CTA3881
Ships on Jul 24, 2026
$ 141.41 USD
Free Shipping
$ 141.41 USD
Free Shipping
Replaces front crankshaft seal on BMW B37, B47, B48, B57, B58, N47 & N57 engines Features: Compare to BMW Factory Tool 118 800 Components: 3881X01 – Press Sleeve, 3881X02 – Guide Tool, 3881X03 – Nut & 3881X04 – Screws Visit ctatools.com for product instructions
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BMW Crankshaft Rear Oil Seal Installer - B37, B47, B48, B57, B58, N47...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTA Tools - Corporate Logo
T#:640832
Part#: CTA3882
Ships on Jul 24, 2026
$ 246.91 USD
Free Shipping on orders $49 and up
Replaces the rear crankshaft seal on BMW B37, B47, B48, B57, B58, N47 & N57 engines Features: Compare to BMW Factory Tool 118 810, 118 811, 118 812, 118 813 & 118 815 Components: 3882X01 – Guide Tool, 3882X02 – Press Tool, 3882X03 – Press Tool Screws, 3882X04 – Press Cup & 3882X05 – Nut w/ Thrust Bearing Visit ctatools.com for product instructions
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