To get you started …
Description - Technical Brochure P138.
There shouldn’t be any coolant in the VIS system, any contaminants are from venting the crankcase. Ensure the gauze separators within the camshaft covers are clean and the pinhole restrictions unblocked (98% chance yours are blocked if not done previously).
Fit “Stocktake” reconditioned motor units, the balance motor suffers the most from crankcase sludge and the units supplied by Stocktake contain a oil seal unlike the originals.
As previous poster, fit catch tank or clean regularly (mine once a year).
If not already a member join RCoS (Rover Club of Sweden) I and others have written about this subject in Roverbladet (magazine).
Regards
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