Are special tools needed to replace head gasket on 1992 Volvo 940 GL?

Yes, special tools are typically needed to replace the head gasket on a 1992 Volvo 940 GL. Essential tools include a torque wrench for correctly tightening the cylinder head bolts, a gasket scraper for removing the old gasket material, and possibly a timing belt tool for proper alignment during reassembly. A service manual specific to the model is also helpful to ensure proper procedures are followed.