Hi all. I recently got Cupra Formentor 1.4 e plug in hybrid. Only had car for two days and decided to get it fully serviced. Had DSG service, oil change with spark plugs and timing belt. Following day after collecting the car after about 3 miles drive dreading electrical coolant level low came on. Checked level and reservoir for electrical coolant is empty. Can it cause by air pockets when garage did timing belt? Security tag is still on on the bottle so I can't top it up myself.
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- Thread starter adrianator
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Sounds like they didn't bleed the system after they replaced the belt.
Take it back to them, have them rectify their mistake.
Thank you for reply. Much appreciated. That's my thought as well. But also bit confused that battery cooling and engine coolant are two separate systems and worried that garage going to fob me off saying they haven't touched EV side of cooling. I know they did drain petrol engine coolant.
The two seperate system do two different things, one cools the engine, the other cools the HV battery.
The HV heat exchanger sits right in front of the top timing cover, you need to at least remove the pipes to get to the belt. Once you've broke into that circuit, you've introduced air. If you don't bleed it out, you get the symptoms you're describing.
There's no requirement to drain the engine cooling system unless they've used the phaser tool and not locking pins.
Image of the HV heat exchanger:
The HV heat exchanger sits right in front of the top timing cover, you need to at least remove the pipes to get to the belt. Once you've broke into that circuit, you've introduced air. If you don't bleed it out, you get the symptoms you're describing.
There's no requirement to drain the engine cooling system unless they've used the phaser tool and not locking pins.
Image of the HV heat exchanger:
Attachments
I've seen it happen a number of times, they need to cut the locking tab off, bleed the system with a vacuum bleeder, then vent it using diagnostic equipment. The diagnostic bleed cycle need to complete 3 times to be deemed successful.
Done it. Surprisingly only filled less than half litre of G12EVO coolant. Warning light disappeared, car drove well. Tomorrow back to service centre get it checked and hopefully sorted. Also picking new security tag from Skoda Main dealer.
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