You are here:

BMW Repair/HOT E46!! Thermostat or Water Pump??


Dylan wrote at 2010-01-06 16:17:46
If it is an E46, I  would suspect there is an Airlock. The symptom includes what you said on hose being hot, but radiator cold. Second biggest symptom is you don't get hot air inside.  

Jeremiah wrote at 2013-01-21 08:55:20
Well I had the same problem with a coolant leak so I 1st Change my expantion tank to come to find out that it wasn't that but a crack in my radiator a common thing in the e46 models. After going to autozone and purchasing a new radiator for about $155.00 it keep the car cool and everything work just fine untill I started to drive it ran hot and begin to tick so my next step is the get a new thermostat and see if that fixes the problem- J.Cabbagestalk

BMW Repair

All Answers

Ask Experts


Evan Slater


All 1999 model year and newer. Don't know much about pre OBD2 stuff. E46 and newer I am Especially good with late models. I NEED YEAR & MODEL OF VEHICLE! when asking questions. Please give last seven digits of the VIN number. Please give as much background info as possible when asking questions. Please read past questions and answers to avoid duplicate questions.


6 years automotive experience and 3+ years working as a Dealership Master Technician. Will offer dealership Technician perspective with knowledge of common failures/problems, part weaknesses, Service Bulletins, and Improved components. Will not give tipical Dealer Bull

Current BMW dealership Master Technician

Graduate UTI Phoenix 2002 (won 9 out of 15 possible top student awards) BMW STEP Graduate 2004, Over 90% average on BMW ACT competition question for 3 years. BMW Master Technician Level 4 with Master Tech training. ASE Master Certified Technician.

©2017 All rights reserved.