1991 BMW 750iL Q&A
1991 BMW 750iL Question: HOW TO CHANGE THERMOSTAT, WHERE IS IT LOCATED?
Here you go complete process and tools required: http://www.ehow.com/how_4531713_replace-bmw-thermostat.html Coolant should be listed in owners manual or call parts store or a dealer to find out. Mix is 50/50 using distilled water not tap water. Some coolants come pre-mixed. - csubak30