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DISCUSSION => General Topics => Topic started by: batsbats on March 27, 2012, 02:36:16 PM

Title: Heat problem
Post by: batsbats on March 27, 2012, 02:36:16 PM

I recently purchased a '91 318i with no maint history.

The car does not have any heat coming out the vents.

List of things I checked/noticed
-Fan/motors work, as the A/C works fine
-No matter how much the car is warmed up, idle or driving, no heat
-Temp gauge would output around the 1/4 to 1/2 (closer to 1/2) when fully warmed up
-I bled it today and saw some bubbles, but not much..reading a few ticks away from 1/2 way now
-The coolant hoses in the engine bay connected to the firewall (to heater core) are both cold when engine is warm
+BUT the block hose is getting some heat (on the block side), but the actual hose to the firewall is still cold

Is my car still not fully bled?  I read the countless threads on the difficulty of bleeding the car, so I'm not sure if I'm totally there yet.  I hand pumped the upper hose and I've revv'd and bled a few times now.

Title: Heat problem
Post by: DesktopDave on March 27, 2012, 05:28:48 PM

Could be a failed heater valve or blocked hose, too.  The valve is right by the throttle pedal behind the lower dash cover.

Most likely it's not properly bled.  I tend to park mine up a hill, and mix 2/3rds distilled water and water wetter.  Sounds like your running cold as well...maybe the thermostat isn't closing properly?

Title: Heat problem
Post by: batsbats on April 04, 2012, 09:15:03 PM

Thanks Dave,

I pulled apart some of the console and I think my heater valve has failed.  I also agree on a bad tstat.