Hi everyone, I've had a P0306 (#6 cyl engine misfire) intermittently now for about 5,000 miles. The check engine light (with this code) usually comes on when I start the rover and drive it before letting it warm up - but this only occurs maybe only 2-3 times/month and the CE light it will eventually turn off after a few driving cycles. It will run rough though a bit when the CE light comes on - but smoothes out after about 30 seconds. Anyway, I've also noticed some coolant loss that started around the same time the P0306 code started coming on. And I hear gurgling noises from the radiator too. Coolant loss is getting progressively worse, about a pint every 300 miles or so. Its a 2004 Rover and has 56k miles on it. I've changed all the plugs (with correct gaps) and wires, cleaned the MAF, new air filter, and performed the seafoam procedure - all recently done. No change after all this work, as I still get the intermittent 306 code. No milky oil...looks fine. And I don't see any rad fluid leaks, however I can sometimes smell it after I park it from a drive. So now I'm thinking that it must be a small head gasket leak. I checked the compression on cyl 6 and cyl 4, but both were at ~150psi (#6 was 146, #4 was 150). Any ideas? I don't want to start the head gasket job until I'm sure that it is the issue. FYI, I always use premium gas, and all maint. is up to date. Rover has never overheated, however I sometimes use it for heavy towing (6500lbs). Any ideas would be appreciated. I'm close to bringing it to the stealership to get a diagnosis as I'm running out of ideas.