Radiator leak from hose to the left

[delerdelarosa]

Hi. I have a 1984 318i and am currently experiencing prestone leaking from a hose attached to the left of the radiator. I've attached an image to illustrate my problem.

Whenever I turn the engine on, prestone drips from this hose and eventually I have to stop, wait and refill with anti-freeze directly in the radiator (I lose about half a litre every 15 minutes) since I don't have an overflow tank on the 318i (4 cylinder).

Does anyone have an idea as to why this is happening. I'm thinking it has something to do with my thermostat not working properly and not opening, or maybe I'm just being foolish Thanks in advance!

 

[Ben]

i think you have a bad cap. when it is working properly it only lets coolant out when it gets too hot, but as it is, its letting it out all the time. id say get a new cap. anyone else?

 

[delerdelarosa]

Thanks Ben. I think that might be it.

While inspecting the cap, the rubber washer/seal around it seems to be worn out. I tried again, this time making sure the rubber seal is wrapped around better in the radiator "mouth". It's still leaking but less than usual.

I'm going to replace the cap/seal tomorrow and take it around for a spin. I'll post an update!