* Your mechanical experience: If you're comfortable with basic wrenching, using sockets, and understanding how automotive systems work, it's manageable. If you're a complete novice, it might be challenging.
* Accessibility: The alternator's location on the Datsun 620 can be somewhat cramped, making access to bolts and connections tricky. This requires patience and potentially some contortion.
* Rust and seized bolts: Age and weather can cause bolts to seize, making removal significantly harder. Penetrating oil is your friend here.
* Specific year and model: Slight variations between model years might affect access and specific procedures.
What makes it moderately difficult:
* Tight spaces: Working in the engine bay of a 620 can be tight, requiring the use of extension bars and swivel sockets.
* Belt removal and tensioning: You'll likely need to remove the serpentine belt (or V-belt depending on the year), which involves loosening a tensioner pulley. This requires the correct tools and understanding of how the tensioning system works.
* Electrical connections: Disconnecting and reconnecting the alternator's wiring requires care to avoid damaging the connections or shorting anything out.
* Possible corrosion: Old corrosion on the alternator mounting bolts can make removal difficult.
If you're unsure, consider:
* Watching a YouTube video: Search for "Datsun 620 alternator replacement" to see the process visually. This can significantly help.
* Consulting a repair manual: A Haynes or Chilton manual specific to your Datsun 620 year and model will provide detailed instructions and diagrams.
* Seeking help from a more experienced mechanic: If you lack confidence or encounter problems, it might be worthwhile to get assistance.
In short, it's doable for someone with some mechanical skills, but it's not a 15-minute job. Plan for a few hours of work and be prepared for potential challenges.
