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Seat Leon Cupra 1.8t 20 valve intermittent coolant leak at front drivers side.

Jun 11, 2019
I have just resurrected my Seat Cupra 1.8 20 valve turbo. It’s been sat for a year but moved every few weeks and tyres kept inflated. It went for an MOT and failed on the emissions so I replaced the cat and lambda sensors bank 1 and 2. It then passed the MOT (happy days!). I’ve been driving it for a week now and the coolant level has dropped occasionally with no leaks and I have let the engine run without the expansion tank cap on to try and release any air locks. Topped the coolant up just past the max line and drive to work. When I got back to it after work it had leaked about a pint of coolant from the front end drivers side on to the floor. Does it have a pressure release valve on the radiator or is it something else. Checked hoses nothing obvious.
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