What is the torque specification for connecting rod bearing bolts?

[DelAlyssa]

Automotive cylinder head connecting rod cap bolts require 8 Nm torque for the main bearing caps and 6 Nm torque for the small bearing caps. Below are specific details about connecting rod cap bolts: 1. Engine compression ratios vary across different vehicle models, resulting in different bolt torque specifications. You can use a torque wrench to measure the N/m value when removing the bolts. 2. Classification by connection force method: ordinary and reamed hole. Classification by head shape: hexagonal head, round head, square head, countersunk head, etc. Hexagonal heads are most commonly used, while countersunk heads are typically used where flush connections are required. 3. Thread types are divided into coarse and fine threads, with coarse threads not displayed in bolt markings. Bolts are classified into eight performance grades: 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, and 12.9.