The repair facility said possible head gasket for an oil leak. Is it necessary to replace head gasket, or can I just keep a check on the oil level?
leaking oil from head gasket on 2003 Volvo XC90
You can continue checking oil with the knowledge that at any time the oil leak can get worse so don't get into a habit of checking only every now and then. If enough oil leaks out can get on exhaust, connections, hoses, motor mount bushings, etc. Plus if is leaking oil may be leaking coolant internally at a slow rate if can not see coolant on outside. Check coolant level also.