leaking radiator and losing coolant should i be worried?

[Luke the spark]

Hi guys

Just back from the lake district, what a lovely place and fantastic driving roads especially hardknott pass and hoiston pass

unfortunately I think its taken a toll on the car as I now have a dripping leak from the black nut on the bottom right hand side of the radiator
see pic

 

[Luke the spark]

did a quick search which came up with a o ring possibly but ill have more time in a few days to get it up on the jack

 

[Luke the spark]

rather than another topic, another issue now is oil light amber colour bongs and displays on car when I stop but theres plenty of oil when I check the dipstick (not overfull but just over mid way) any one elese had this?

 

[SlammedZ4]

the oil light is a common problem as well as on the e46 bmw, its more than likely the sensor in the sump which requires the sump being removed and oil change because of that hope this helps

 

[Luke the spark]

ok some more pictures

 

[Luke the spark]

I think it could be a leak on the bottom of the bottle?

 

[Luke the spark]

ahhhhh and then while under the car I looked at the belt and that looks a bit dog eared what do you guys think? does it need replacing?


to me it looks like the grooved parts are possibly frayed?