Overheating--Slow Fan

[Tygaflo]

Hi,

I have a 2003 M45 that has been running hot. It first ran hot about a week ago and I took it to a repair shop that replaced my radiator. They said there was a leak at the top and bottom of the radiator. My reservoir cap was replaced too since it had a crack in it and I was told this would allow unwanted air to continue to enter the cooling system.

The mechanic told me the air bubbles would eventually leave the system after I drove the car around for awhile but this didn't happen. My car continues to run hot...the temperature gauge fluctuates when I'm parked or at a light for a few minutes.

Someone mentioned that my fan was running slower than it should be and that I should get it checked out. After reading online about it, I saw something about fan fluid. Can anyone help me troubleshoot this problem? What do you think I need to check next? If you think it is the fan fluid, how do I add/check this?

[EdBwoy]

The hydraulic fan fluid is what engages your clutch to run the fan - to simplify.
It is in a canister that looks like the power steering reservoir, but on the driver side of the engine. Youll see a little of it poking under the engine cover but you have to remote the cover to access it. Check the level in it to start off.

[fetusflipper]

Have you tested the fans with 12V directly? If not, run 12V directly from the battery to the fans for a second and see if they both power on.