Coolant and Heating front pipe leaks

The selector for the hot air to come through the cab heater operates a valve situated above the spare wheel. If this leaks you can temporarily repair it with some copper pipe made in to a U shape (with some compression fittings) fit it in to the out and return pipe with two jubilee clips to hold it on, let it rest on the spare wheel. It'll get you home, and if it's summertime you've got till winter to fix it.