This ARP2000 Head Stud Kit is designed for the turbocharged inline 4-cylinder B48 engines found in varias BMW chassis and Mini Engines. As you increase the power output of your engine beyond its factory specifications, the head and block may start to separate, causing factory bolts to stretch and fail. ARP Head Studs are stronger than factory bolts, ensuring your race engine stays together even under extreme conditions.
Installation Instructions:
1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser.
2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.
3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD SEALER.
4. Screw studs into the block “HAND TIGHT ONLY”.
5. Install the cylinder head(s) and check for binding or misalignment.
6. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Then install the washers and the nuts onto the studs and tighten them hand tight.
ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used.
Please note: After initial assembly, it is necessary to allow the engine to complete a full heat cycle, then re-torque your head studs to spec. This means allowing the engine to warm up to its normal operating temperature, remain at operating temperature for several minutes to ensure each component is uniformly heated, then turned off and cooled completely to ambient temperature.
PRELOAD (TORQUE) RECOMMENDATIONS
7. Following the manufacturers recommended torque sequence tighten the nuts steps 1-3
ARP2000
Step 1: Tighten to 30 ft-lbs.
Step 2: Tighten to 60 ft-lbs.
Step 3: Tighten to 90 ft-lbs.
with ARP Ultra-Torque fastener assembly lubricant
Bolt Torque Sequence
BMW B48 Applications:
1 Series
2019-Present F40 118i / 120i / 128ti / 135i
2 Series
2014-2021 F22/F23 218i / 220i / 230i
2021-Present G42 220i / 230i
2020-Present F44 218i / 220i / 228i / M235i
3 Series
2018-Present G20 318i / 320i / 330i / 330e
4 Series
2020-Present G22/G23 420i / 430i / 430e
5 Series
2017-Present G30/G31 520i / 530i / 530e
6 Series
2017-Present G32 630i
7 Series
2015-2022 G11/G12 730i / 740e
X1 Series
2015-2022 F48 sDrive18i / sDrive20i / xDrive20i / xDrive25i
2022-Present U11 sDrive18i / xDrive20i
X2 Series
2018-Present F39 sDrive18i / sDrive20i / xDrive20i / xDrive25i / M35i
X3 Series
2017-Present G01 sDrive20i / xDrive20i / xDrive30i
X4 Series
2018-Present G02 xDrive20i / xDrive30i
X5 Series
2018-Present G05 xDrive25i / sDrive25i
Z Series
2018-Present G29 Z4 sDrive20i / sDrive30i
Toyota B48 Applications:
A90 / A91 Supra
2020-Present GR Supra 2.0
MINI B48 Applications:
MINI Hatch [F55/F56/F57]
2014-Present Cooper S
2015-Present John Cooper Works (JCW)
MINI Clubman [F54]
2015-Present Cooper S
2016-Present John Cooper Works (JCW)
MINI Convertible [F57]
2016-Present Cooper S
2016-Present John Cooper Works (JCW)