Hi Having a bit of trouble with my oil filler cap thingy. Since I changed my supposedly faulty thermostat my engine has been getting hot, top of the white bit on the gauge and smoke comes from the bonnet, when I check under the bonnet the oil cap has come off and oil is spitting over the...

The heater on my 1989 2.5td has just recently started blowing out cold air only. I thought it would need a new thermostat so stuck one on and the problem still persists, any suggestions please??