Are other parts required to be removed and what's the proceedure to refill cooling system? What coolent do I use and how much mixture with water? Please provide any other info that would help me change my themostat? Thanks for your help, Craig McConnell
HOW TO CHANGE THERMOSTAT, WHERE IS IT LOCATED? on 1991 BMW 750iL
by Mackadue in Denver, CO on December 06, 2012
ANSWER by csubak30 on December 06, 2012
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.