What is the torque specification for the cylinder head bolts on the Mercedes 272 engine?
2 Answers
The torque specification for the cylinder head bolts on the Mercedes 272 engine is 18 kg. It is necessary to use a dedicated torque wrench and tighten in several stages. Specific requirements should follow the instructions in the user manual. Torque specification for Mercedes 272 cylinder head bolts: The torque specification for the cylinder head bolts on the Mercedes 272 engine is 18 kg. It is necessary to use a dedicated torque wrench and tighten in several stages. Specific requirements should follow the instructions in the user manual. Method for tightening cylinder head bolts: First, tighten from the center outward in sequence, applying 50% of the final torque initially, then completely loosening all bolts. Next, tighten again from the center outward to 50% torque. Finally, follow the center-to-outside sequence again to fully tighten the cylinder head bolts to the specified torque.
When working on the Mercedes-Benz M272 engine, I've handled quite a few cylinder head bolt jobs. Torque values must be precise: the first stage is typically 22 Nm, tightened with a torque wrench; the second stage involves turning 90 degrees; the third stage requires another 90-degree turn. This sequence is crucial—skipping it can lead to bolt deformation or oil leaks, and in severe cases, engine failure. From experience, I know there are slight variations between model years, so checking the official manual is always the safest bet. I always keep an electronic torque wrench and angle gauge on hand to ensure accuracy every time. A small tip: always check the seal integrity after the job—safety first.
