got a 2000 323 and its bubbling a small amount when cold up through the radiator cap. I've replaced the water pump,thermostat, all hoses, pulled the radiator and made sure its flowing through it like it should.
When its first cranked with the cap off you can see small bubbles coming up through the expansion tank. When the thermostat opens it's like a geyser blowing out the expansion tank.
I just did a compression test on it. All plugs look normal and dry, compression is from 170 to 190 cold and dry.
Anyone have any suggestions.
Thanks ,Thomas