UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Good morning, In my professional opinion I would have to agree with you on this one here. There are a few different ways you can confirm it is indeed the headgasket. 1. You can buy a radiator pressure tester, the way it works you install this right where your radiator cap is. You will than add air to the cooling system with the vehicle off. If you can see the pressure drop down but it is not leaking this is a good indication the headgasket is failing. You can remove the oil cap while it is pressurized and normally hear a small air leak verifying it is the head gasket. 2. For this option you simply buy a test kit and will have a testing strip that you soak in the cooling system. If it turns a certain color it means you have exhaust gases inside the cooling system verifying it is for sure the headgasket. http://www.harborfreight.com/radiator-pressure-tester-kit-69258.html
The links above are what the actual tools look like. The local parts stores should have something similar but it will be their own brand.
Thank you for choosing justanswer, have a great weekend, Charlie.