The injector stretch bolts on a Mercedes Vito CD110 engine require precise tightening to ensure proper injector function and prevent damage. The correct torque setting for these bolts is crucial to achieve the desired clamping force and maintain a secure seal.
For the Mercedes Vito CD110, the torque setting for the injector stretch bolts is:
25 Nm (2.5 kgf·m or 18.4 lb-ft)
It's important to follow this specified torque setting accurately to ensure the injector bolts are tightened with the appropriate tension. Over-tightening the bolts can cause excessive stress on the threads, leading to potential damage or bolt failure. Conversely, under-tightening the bolts may result in insufficient clamping force, compromising the injector seal and potentially causing leaks or injector movement.
To achieve the precise torque setting, it is recommended to use a properly calibrated torque wrench. Ensure that the torque wrench is set to the desired value (25 Nm) before tightening the injector stretch bolts.
1. Initial Tightening: Hand-tighten the injector stretch bolts until they are snug but not fully tightened.
2. First Pass: Tighten the bolts in sequence, following the recommended tightening pattern. Use the torque wrench set to 25 Nm to snugly tighten each bolt to the specified torque.
3. Second Pass: Allow the injector bolts to settle for a few minutes. Then, perform a second round of tightening, following the same sequence. This helps ensure that the bolts are seated properly and evenly tensioned.
Properly torqued injector stretch bolts ensure that the injectors are securely held in place, preventing leakage and ensuring optimal engine performance. Always refer to the vehicle's service manual or consult with a qualified mechanic to confirm the specific torque settings for your particular Mercedes Vito CD110 model and engine variant.
