Transit van M reg 2.5 engine diesel. My engine constantly overheating spurting water out from the expansion tank when the van is moving no mater what speed i am going. When i refill the water and the engine is idoling it works perfect with no water loss or strange noises coming from the expansion tank. I have replaced the thermostat with no change to this problem. Oil level is fine. checked the haynes manual but is limited to its solutions eg. thermostat - belt tension leaky hoses all which are fine. CAN SOMEBODY HELP PLEASE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

PAUL, August 2008

check oil pump, oil coolent system ,it is not working very well

pete, February 2010

In cheapest to do order.Is the rad a uniform temp?cold spots would indicate blocked core(backflush anyway)top hose and btm hose should be same temp when stats open.2nd,cooling system is presurised so cap MUST be a good seal(swap for 2nd hand)3rd.coolant pump to be removed and checked.(seen impellers rusted away/loose ,lost!you name it)4th.cylinder head gasket,best tested with a fluid dye test,(the fluid reacts to hydrocarbons present in the coolant)good well equiped independant garage should oblige.

caine, August 2008