Temp Gauge Rising + Oil Under Front Right Tyre

[Doffy]

Hello, Sorry if this is the wrong forum.

I filled my radiator with pre-diluted anti freeze I bought in Halfords, since then the temp gauge has been rising and stays roughly 3/4 of the total (Half way between middle and the red zone). I'm guessing this can be fixed by bleeding the radiator? Just wanted to check before I attempt it because I don't want to cause any damage.

Also since that has happened I have noticed black spots below the engine next to the front right tyre, I think its oil although I'm not sure. Could it be related and what could the cause be?

Thank you.

[jasonmayall]

Did you not bleed the system when you changed the coolant?
If so, that could be a cause for the high temperatures... how long have you ran it like this?
Reason I ask is there's clearly air pockets in the cooling system, This causes the system to run at a higher pressure and CAN cause head gasket (and other issues). I wouldn't be surprised if the drip is oil from the head gasket as its been ran without the system being bled properly.

[Doffy]

Hi thank you for the reply. I put the pre diluted coolant into the engine just before Christmas, I only went on one trip which was long enough for the temp gauge to rise (20km). Unfortunately I have absolutely no knowledge on how to bleed the engine, I have looked at a Youtube video but that was just images.

Could you possibly provide a guide on how to do it with a Saxo and where the screws are located? Also what tools would I need?

Sorry for the questions, i just don;t want to cause any damage.

Thank you.