Volvo Dealership replaced my entire?

Normally the warranty will continue from the original in service date of the vehicle. Mileage is also a factor. The original factory warranty will expire on the day or mileage specified in the warranty booklet. Check the paperwork for the repair and your warranty booklet to be sure. As far as the fuel injectors, no, there's no additional warranty on them. They're an accessory and not part of the engine that was replaced. They were transferred from the old engine to the new one. Hope that helps! Jim

Ask the dealer who installed the engine.

Indeed, ask the dealer that did the install. Some replacements come with their own independent warranties.