1. Consult your vehicle's repair manual: This is the most reliable source. The manual will list the correct torque specifications for your specific engine and oil pan.
2. Check a reliable online repair database: Sites like AllDataDIY or Mitchell 1 (subscription required) often have detailed repair information including torque specs.
3. Look for markings on the bolts themselves: Sometimes, a torque value might be stamped or etched onto the bolt head. This is less common but worth checking.
Without the specific information from your vehicle's repair manual or a reliable database, attempting to tighten the oil pan bolts could result in stripping the threads or damaging the pan. Using the wrong torque could lead to leaks and engine damage. Always prioritize finding the correct specification before proceeding.