Hi,
I have a MK4 Golf PD 130 86000 miles regular vw parts service and have had the water puump cam belt service carried out summer 2008- service on long life. Now im loosing water from the water coolant tank (where you put antifreeze in) when im driving on the motorway for more than 30mins at a speed of 80-90mph. When accelerating when driving through the town the engine makes a churning noise (like a clicking noise). I've taken the vehicle to a VW/Audi Specialist and the following test have been done along with the results have been found:
1)Pressure test to coolant system = slowly loosing pressure.
2)Clamped off heater matrix = which reduced loss of pressure.
3)Carried out cylinder block test=failed - this meant carbon monoxide from the engine is entering the cooling system, possible head gasket, cracked block/cylinder head or oil cooler.
Further i have been told after these tests were carried out and the results found that the following needs to be carried out:
1) Requires Stripping for investigation
2 Recheck heater matrix once engine passes block test.
And also a couple of months ago i put radwell in the coolant tank as i was told it could be a leak in the radiator, but this only messed things up more. Now i have to carry a bottle of water around with me just in case if the car needs a top up of water + antifreeze.
ANY SUGGESTIONS AS TO WHAT THE PROBLEM COULD BE, PLEASE HELP.
THANKS
