M156 Titanium Camshaft Bolts [ 4 pcs ]

Titanium Camshaft Bolts [ 4 pcs ] $200.00

Inventory status: In stock, ships in 3 – 5 days.

Class 10.9 Equivalent

Stock bolts are TTY and are one time use. These bolts replace the stock camshaft adjuster bolts and are reusable. Essential for Adjuster rebuilds. Every little bit counts. A necessity in strength and power in its unique lightest form. Complete the weight reduction program of the M156 with these reusable M12 bolts. Engineered to have a larger surface area for improved clamping of the camshaft assembly (magnetic sprocket, camshaft adjuster, diamond disc washer, and camshaft). Use only on Stock Camshafts or Stage I Camshafts. For Big Cam upgrades use ARP Camshaft Bolts.

15K R&D Process Certified

Stock OEM Cast/COREX Stage I Camshafts

Follow the factory two-stage torque down of 45 Nm (33 Lbs Ft) and then add 90 degrees in one sweep.

COREX Stage II/III or Solid Billet Aftermarket Camshafts

The use of M156 ARP Camshaft Bolts [ 4 Pcs ] with backout prevention feature is more appropriate.

Prices in USD

Further Reading

First stage of torque down process is 45 Nm or 33 Lbs/Ft. Second and final Stage is adding 90 degrees. Always inspect threads for deformation prior to reusing. 1000 MPa + tensile strength. Replaces item 185 and 215 in the exploded view above. Holds the Camshaft Adjusters and the Camshafts together as one completely timed assembly. Four pieces replaces the TTY bolts on both banks.

Grade 10.9 Steel bolt replacement. Optimized Grade 5 Titanium bolt with 12 Point head. Approximately 70% the weight of stock bolts and almost 50% of the weight of ARP fasteners. Use of calibrated electronic torque wrench is recommended to achieve accurate readings and lifetime use out of these bolts.

Replaces the bolt with the part no. N910105012018.

Locating Device / Timing Tool is required to perform cylinder head work, MB Part no. W156589006100.

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• Titanium Adjuster Assembly Bolts