You can get a genuine exhaust tube from fiat or cheaper still get one of the shelf in halfords.. Slide it on as you say exhaust to air filter..inside the air filter is a flap which is temp controlled. It will help with cold starting and driving with the tube helps when cold outside.
To flush the cooling system take the hoses off all over and reverse flush with a water hose. Turn your heating lever to hot and flush the matrix. Take the thermostat out as well...this way you know you have done a good job.
To get the air leaks out there is a plastic screw where the hoses go into the heater matrix and you may have a tap on top of the rad to the left.
To flush the cooling system take the hoses off all over and reverse flush with a water hose. Turn your heating lever to hot and flush the matrix. Take the thermostat out as well...this way you know you have done a good job.
To get the air leaks out there is a plastic screw where the hoses go into the heater matrix and you may have a tap on top of the rad to the left.