First a little back ground. Cold winter and I started the car to let it > warm up, went into the house for 10 minutes. When I came back out> I found that the car had heated up a little( just over the 1/2 mark) Found > it weird but wasn`t overly concerned with it as I was running late for> work. As soon as I got moving the needle dropped back into the normal range > and all was good. The next morning I found I had trouble starting the> car. So a little looking under the hood and I notice that the radiator cap > has broken off ( holding in place but inside portion was broke). Buy a new > cap> (cheap one) and top the system up. The car that night started up after > numerous attempts.Still I haven`t placed the all the clues together here.> I look at the rad level and it is low again, so one more top up ( 10 ounces > at a time, coke can worth).Finding this weird I stop by Honda and they say > buy the> cap off them as the cheaper ones don`t hold the pressure good enough, sold i > buy it and install. Next day ; same thing,same time. So to sum up 60kms > (35mi) a day and I have to add 8-12 ounces of rad fluid. No external leaks, > one major symptom is the oil filler cap has moisture on it and no white > smoke billowing out. I go by the Honda shop and they tell me that they have > never heard of someone changing the head gasket on a 1997 Accord , to look > further, Any idea what else it might be? Car has 170,000 km .