Do coolant flushing machines work on a 928?
 

Have any of you ever successfully used a coolant flushing machine successfully to change the coolant on your 928? I've never heard of anyone using one on a 928 before, but it seems to me that it would not only simplify coolant changes, but also ensure that all old coolant gets removed from the cooling system.

The 928 doesn't have a single path for the coolant, these "exhange" type machines were built to work with some specific newer cars and IMHO all the fluids on a 928 are best drained and replaced in the conventional manner.

John covers pretty good
http://members.rennlist.com/pirtle/svc.html