'89 is 14 quarts including heater. IIRC
there was a radiator and coolant flow change
about that time so the '87 might be a bit
more or less.
Might be better info in the C4 tech section
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.