520i se auto overheating
 

hi, im new to this this forum and am in desperate need of some help people.

I recently bought a 520i SE AUTO and so far have replaced the radiator, water pump, thermostat and hose pipes. I orginally thought that I had a severe air lock but I have bled the system about 4 times now.

The problem is that the pipes get hot and rock solid and have to bleed the system and pour water into the main bleed valve.

No I dont know what the problem and am even considering whether it is a possible head gasket problem, although the car does not over heat on every journey, sometimes it stay normal for a week.

Please help me as this BMW is costing me a complete fortune

Tony

Hi Tony,
Is there any water under the car like when you first start it? I had an over heating problem too with mine. The expansion tank on the E39 are notorious for going bad. I ordered one for about 30 from europarts and it solved the problem. Oh it would be a good idea to replace the radiator cap too. I hope this helps solve your problem.

Rich