* Mechanic experience: A professional mechanic familiar with the Blazer and Vortec engine could likely complete the job in 15-25 hours. Someone with less experience might take significantly longer, potentially doubling or even tripling that time.
* Condition of the vehicle: If the Blazer is already partially disassembled (e.g., the old engine is already out), the installation will be much faster. Rust, seized bolts, or other mechanical issues can add considerable time.
* Tools and equipment: Having the right tools and a hoist makes a huge difference. Lacking essential equipment will significantly slow down the process.
* Completeness of parts: If all new gaskets, seals, fluids, and other necessary components are readily available, the installation will proceed smoother than if parts need to be sourced during the process.
* Engine condition: Installing a completely rebuilt or new engine versus a used one impacts the overall time. A used engine might require additional cleaning, inspection, or repair, adding to the workload.
Therefore, a reasonable estimate for a reasonably experienced amateur mechanic with adequate tools would be 30-50 hours, possibly more if unforeseen problems arise. A professional shop might quote anywhere between 20-40 hours of labor, but this depends on their hourly rate and the shop's specific policies. It's best to get a detailed quote from a reputable mechanic before starting the work.
