Radiator problems I think

[Numark318i]

Thanks for replying to my other post...

I got another question, my "91" 318i seems to run low on radiator fluid every three or four weeks, and of course then my temp gauge goes up and i refill it, but where the hell is the fluid going? I checked every where for leaks and couldnt find anything. Two people have told me maybe its leaking into the engine through a hole in the block...could this happen or what? Wouldnt the car overheat constantly because the water in the oil? Well if you got any suggestions or comments please tell me.

Thanks

[KC Ron Carter]

If there is no external leakage then the engine is consuming the coolant.

With a steel block and an aluminum head, the expansion rates of the parts is very different so the head gasket must take up the gap.

It is not unusual for the head gasket to start allowing the coolant into the combustion chamber.

Get a co2 coolant test for head gaket leakage.

Or you can pull the spark plugs and look for one that is very clean.
The coolant flashes the carbon off the sparkplug.

It is also not unusual for the gasket to seal up again as the engine reaches the normal temperature.

Later,