Howdy. Maybe someone else has experienced this. I have a 2001 9-3 2.0L. My coolant is disappearing. Often an inch per hour drive. Just had head gasket done by a SAAB master tech. Hoses checked and/or replaced. No milkshake oil. No visible oil in coolant. No findable drips. No sweet odor. No smoke from tail pipe. Coolant system pressure tested fine. BUT, on hard acceleration, with extended high boost, there is a terrible burning smell. Otherwise, the engine idles and runs perfectly. Thoughts?