ARP custom-designed the ARP2000 head studs specifically for the S38B35 and S38B36 inline 6-cylinder engines found in the E24, E28, and E34 M5 and M6 chassis. These head studs provide various benefits upon installation, such as improved clamping force and better sealing of the head gasket, ultimately preventing head gasket failure. These benefits are especially important for high-performance or turbocharged engines that experience increased cylinder pressure, which can cause additional stress on the head gasket and bolts. 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. PRELOAD (TORQUE) RECOMMENDATIONS 7. Following the manufacturers recommended torque sequence tighten the nuts steps 1-3 Step 1: Tighten to 30 ft-lbs. Step 2: Tighten to 60 ft-lbs. Step 3: Tighten to 95 ft-lbs. with ARP Ultra-Torque fastener assembly lubricant Bolt Torque Sequence 12 10 4 2 6 8 14 13 7 5 1 3 9 11 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. BMW S38B35 Applications: BMW 5 Series 1985-1987 E28 M5 [European Market]1987-1988 E28 M5 [American Market] BMW 6 Series 1984-1989 E24 M635CSi [European Market]1987-1989 E24 M6 [American Market] BMW S38B36 Applications: BMW 5 Series 1988-1992 E34 M5
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