How to Remove the Crankshaft Bolt on a Sylphy?
3 Answers
Sylphy crankshaft bolt removal method: 1. Use a cross-head screwdriver and a 13mm T-wrench to remove the air filter; 2. Loosen the generator bracket bolts with a 13mm box-end wrench and detach the generator, then remove the generator belt; 3. Use a shorter 13mm box-end wrench to loosen the air conditioning compressor bracket bolts and remove the compressor belt; 4. Insert a flat-head screwdriver into the small hole at the bottom of the transmission to lock the flywheel, while using a 15mm box-end wrench to loosen the crankshaft pulley bolt, then the crankshaft bolt can be removed. The Sylphy is a model under Dongfeng Nissan, with body dimensions of 4641mm × 1815mm × 1447mm and a wheelbase of 2712mm.
I've done the job of removing the crankshaft bolt on the Sylphy quite a few times. The key is to have the right tools and not mess around. First, make sure the car is parked securely, the engine is off and the power is disconnected. Then use a specialized holding tool to lock the crankshaft in place to prevent it from rotating. The bolts are usually extremely tight with high factory torque settings. Using a regular wrench might cause slipping or breakage, so I prefer using a torque wrench with an extension bar or carefully loosening it with an impact wrench. Take it slow when removing—no brute force. If the bolt is rusty, spray some WD-40 lubricant first, wait a few minutes, then try again. Remember, after removing the bolt, check the threads for damage. If there are burrs, smooth them out with fine sandpaper. When reinstalling, follow the manual's torque specs—too loose or too tight is no good. If you're inexperienced, it's best to get help from a repair shop to avoid damaging the engine. My first attempt nearly ended badly, so now I always wear gloves and safety goggles.
Removing the crankshaft bolt on the Nissan Sylphy is actually quite interesting. I've done it a few times myself, and the key is having the right tools and patience. First, turn off the engine and use a crankshaft locking tool to secure the shaft—otherwise, the bolt won't loosen when you turn it. The bolt is usually extremely tight, so use a sturdy wrench with a breaker bar, starting with gentle force. If it doesn't budge, spray some rust penetrant and try again. After removal, check the thread condition—clean any damage promptly, and don't forget to apply anti-seize grease before installing the new bolt. Take your time throughout the process; safety comes first. If you don't have professional tools on hand, borrow equipment from a repair shop instead of forcing it yourself to avoid accidents. I do this in my garage for the fun of hands-on work, but make sure to set aside enough time and avoid rushing.
