cooling system

2000 BMW E39
180,000 MILES • 2.8L • 6 CYL • 2WD • AUTOMATIC
Avatar
LENLEMON0577
  • MEMBER
  • 1 POST
Hi there, I am losing about a half cup of coolant after a drive no water in the oil. I have just replaced the expansion tank as well. I have only had to top it up twice car maxed out today at about 89 degrees on a thirty degree day. Thanks.
Nov 20, 2017 at 6:48 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
KHLOW2008
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 41,814 POSTS
There is a minor leak somewhere and a pressure test would help to determine where the leak is coming from. First look for signs of coolant residue, usually radiators are common leakage area for BMW. Other areas to check would be the water pump, hose joints and hoses.
Nov 20, 2017 at 11:26 PM
Advertisement
Avatar
RENEE L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 1,260 POSTS
Hi LENLEMON0577,

I am sending you a link to a helpful and informative article from this site. This article features a step by step guide, pictures and a video on how to pressure test a cooling system.

https://www.2carpros.com/articles/radiator-pressure-test

Thank you for visiting 2CarPros.

All the best,

Renee
Admin
Nov 23, 2017 at 12:56 PM