Does the Oil Pan Bolt Need to Be Replaced?
4 Answers
Oil pan bolts need to be replaced. Below is relevant information about oil pan bolts: 1. Bolt torque range: Generally, the torque for cast iron oil pan bolts is 22-27 Nm, while for all-aluminum oil pans it's 15-22 Nm. 2. Bolt torque explanation: Bolt torque refers to the tightening degree of the bolt and its torsional breaking force. The international bolt torque standard allows a tolerance of ±10% A. Essentially, torque is the moment that occurs when a material undergoes torsional deformation. Bolt torque testers are primarily used to measure bolt torque to determine the force level at which a bolt can be twisted to break; this instrument is commonly used in screw-related enterprises and metrology bureaus.
Regarding whether the oil pan drain plug needs to be replaced, I personally think it depends on the specific situation. The drain plug is a critical component during engine oil changes, and it should be inspected for wear, deformation, or stripped threads each time it is removed. I've noticed that aluminum drain plugs are prone to scratches, so I recommend replacing them every time. If reused multiple times, the threaded hole can become damaged, leading to oil leaks. Minor leaks may dirty the ground and waste oil, while severe leaks can cause engine oil starvation and thousands in repair costs. Spending 20-30 yuan each time to replace the plug can prevent major risks. During oil changes at a shop, standard practice usually includes replacing the plug—don’t skimp on small expenses. Make it a habit for safety and reliability.
As an average car owner, I've experienced bolt issues. Last year when changing the oil myself, I reused an old bolt, and weeks later found oil stains under the car. The repair shop said the worn-out sealing washer caused leakage, costing over 500 yuan for cleaning and repairs. Since then, I always buy new bolts or let the shop replace them during oil changes. Bolts are cheap - just 10 yuan online; theoretically reusable if threads are intact, but prone to stripping or loosening. My friend didn't replace his and eventually the bolt head snapped, requiring oil pan removal. My lesson: frequent replacement prevents trouble.
The oil pan screw doesn't necessarily need replacement every time, but its condition should be evaluated. Check for any damage, deformation, or cracks in the washer. If normal, it can be reused after cleaning, but replacing it directly is more cost-effective for peace of mind. Aluminum screws are soft and prone to stripping, so they must be replaced. Tighten with the correct torque to prevent damage to the threaded hole. The risk of oil leakage is high: it can pollute the environment or damage the engine. For DIY, purchasing an oil change kit with screws provides a quick solution. Overall, replacing the screw is low-cost and highly effective.
