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S1 coupe heater unit

Posted: 12 Jul 2022, 09:22
by mikeg
Looking at possibly removing my S1 coupe heater unit assembly for a refurb etc.

Is it possible to just close the heater cock and also the bleed cock (near the horns on the subframe) before removing the matrix hoses?

Or do I need to fully drain the coolant from the whole system?

thanks,

Mike
S1 Rallye 1,3

Re: S1 coupe heater unit

Posted: 15 Jul 2022, 19:44
by marnix
you best drain the coolant... not so, difficult. even then it will be a bit messy..

Re: S1 coupe heater unit

Posted: 16 Jul 2022, 10:31
by Huib
And blow compressed air into the hose going to the matrix to move as much coolant as possible to the drain.