DIY: How to add & bleed a Coolant for BMW E46/E39 3 Series 2000-2006
This method is good for people who are not mechanical professionals. It
shows how to tighten the caps correctly without using torque or hand
tightening. It is concise video footage and simple and quick way to do it
yourself. Save a lot of money if you are not going to Dealers.
1. How to flush the old antifreeze out to replace coolant:
Coolant Check and Bleed With How To Activate The Electric Water Pump
This demonstration is on an X3 with an N52 that has the electronic water
pump. This shows how to check and bleed the cooling system and how to run
the electrical water pump which would be needed after a cooling flush or
work on the cooling system.
This vehicle had started overheating causing the fan to turn on high. There
were communication faults for the water pump which had failed and needed
BMW Expansion Tank Diagnosis Part 1 of 2
Trouble shoot where the leak occurred on the Expansion Tank. This is from a
E46 330i - M54 motor with Automatic transmission.
Hi-Res Photos of the hairline crack:
Part 2 Continue of Diagnosis - Automatic Transmission Coolant Thermostat:
A good question by dellyx -
"Can I ask what the rate of coolant loss was from such a small leak. I'm
topping up at the moment awaiting time to find the cause, but just
curious to see how such a crack would impact on fluids over miles."
Youtube didn't allow enough space for me to give a full reply, so I'm
putting it here:
Good question.. It's been awhile since this happened, so I may be off a bit
from what I can remember. However, the resulting leak was initially was
small from this particular tiny crack - Less than a cup of coolant per
week. I drive about 40 +/- miles every day. But, it got steady worse to
about a whole expansion tank worth PER Day, near the time I finally did
the replacement. DO NOT wait that long to get yours fixed. I was very lucky
I didn't ruin my engine. Find your leak & replace, ASAP.
Obviously there was a leak issue, I just couldn't find the leak because of
the crack was so small and because of the splash shield underneath that
covered & captured most of the spilt coolant making it's exact location
very difficult to pin down. If you have a coolant leak problem, I would
advise that you remove the plastic splash pan/shield and have a flashlight
to get a good look around. Replace the failed part(s) ASAP! I was lucky
that I didn't experience a catastrophic explosion of my expansion tank...
That would have been a costly problem.
Just remember, once you get this unit replaced.. be sure to use BMW coolant
(it's fluid is blue & mixed 50/50 with distilled water) and to BLEED the
cooling system afterwards to prevent overheating.
NEVER over fill your expansion tank!
Fill only to the specified level - between the two bubbles of max. and min.
If you deliberately over fill, you can cause your expansion tank to explode
BMW E46 GRINDING NOISE.wmv
Noise comes on after driving for awhile. Water pump, deflection pulley, and
two belts changed 6 months ago. Any idea where it's coming from. Thanks.
BMW Serpentine Belt and Pulley Replacement, How To
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blog for thousands of Tech and DIY BMW and MINI articles at:
In this DIY and How-To video, we'll show you how to remove and replace the
engine accessory serpentine drive belt, the air conditioning belt and the
tensioner and idler pulleys. A 2001 3.0i Z3 with the M54 engine was used
for this video. The procedures shown can be applied, in general, to most
BMW models that have serpentine type accessory drive belts. This includes
most 6-cylinder models from the early '90s on and all V8 models.
Note that the models shown here uses a mechanical type belt tensioner for
both the main belt and the AC belt. Some models employ a hydraulic
tensioner assembly. The replacement procedures are slightly different, as
they are for the V8 models. The applicable Bentley repair manual will
address the details for various models.
Bentley repair manuals:
Fan clutch removal tools:
Belts and pulleys;
All products noted in this video can be purchased in our online store,
http://www.bavauto.com/, 24 hours a day, 7 days a week. You are also
welcome to e-mail us at email@example.com or call into our headquarters and
speak to our knowledgeable advisors at (800) 535-2002 (Mon.-Thurs. 8AM to
9PM EST, Fri. 8AM to 7PM EST, and Sat. 9AM to 4PM EST).
Unlock and TEST your BMW E46 3 Series OBC Hidden Functions DIY
Follow me as I check my Battery Voltage to see if I need a new battery or
Instructions to access the hidden OBC functions:
1. Hold Trip Reset while turning ignition key to on position
2. OBC should show "Test"
3. Use Trip Reset to select function 19.0 that unlocks all the features
3. Wait for display to show "Off"
4. Depress Trip Reset for 1/4 second and release it
5. With no delay press Trip Reset several times to select one of the
following function s
BMW E46 On-Board Computer (OBC) Hidden Codes
# - example description
1 - Car Engine and cluster data
1.0 - 46nnn Chassis nr/VIN serial number (last 5 digits)
1.1 - 4nnn K-number
1.2 - 690236 Cluster Part #
1.3 - 045210 Coding (04)/diagnosis (52)/bus index (10)
1.4 - 1200 Week (12)/year of manufacture (2000)
1.5 - 09_160 Hardware (09) and software # (16.0) of cluster
1.6 - Not used
1.7 - 04__44 CAN-version (04) KI-revision index (44)
2 - (test) Cluster System Test - Activates the gauge drivers,
indicators and LEDs to confirm function
3 - SI Data
3.0 - 1098 Used fuel in liters since last SI (Service Inspection)
3.1 - 0231 Periodic inspection days; elapsed days (since last SI)
4 - Momentary Consumption
4.0 - 0145+ Instant fuel consumption - 0145=14.5 liters/100km
4.1 - 0018 Instant fuel consumption - 0018=1.8 l/Hour
5 - Distance Gone Consumption
5.0 - 082 Average mileage; 082=8.2 liters/100km
5.1 - 0536 Calc. km to refuel (momentary distance to go)
6 - Fuel Level sensor inputs in liters
6.0 - 109330+ Fuel level averaged; Left half sensor input=10.9 liters;
Right sensor input=33.0 liters
6.1 - 0439+ Total tank level averaged; vlgs 6.0: 10.9+33.0=43.9 liters
6.2 - 0442+ Indicated value (44.2) and tank phase
7 - Temperature and Speed
7.0 - 021+ Coolant/Engine temperature (2.1C)
7.1 - 130 Ambient/Outside temperature - chg met 5 pts. 125/130/135
7.2 - + Engine speed / Current RPMs 1/min
7.3 - + Vehicle speed / Current Speed in km/hour
8 - Input value in HEX form
8.0 - 1d0+ System voltage ADC-Value Hex code
8.1 - 26C33C+ ADC Values HG left/HG right
8.2 - 0000 ADC Value brake degradation sensor (000=o.k.)
8.3 - 18C ADC Value outside temperature
9 - Battery
9.0 - 140 Battery Voltage - 140 = UB 14.0v
9.1 - 242013+?
9.2 - 074_78+?
10 - Not used
11 - Not used
12 - Not used
13 - Gong Test
14 - Not used
15 - Status cluster I/O-ports (bit codes) 0=low; 1=high
1st-belt contact, seat belt fastened=0; 2) ignition lock contact, key
inserted=0; 3) door contact, door open=0; 4) clock button pressed=0; 5) SI
reset=0, for reset=0; 6) EGS transmission failure=0
Status Digital Outputs (bits) 0=inactive, 1=active
1) Gong output; 2) Brake warning lamp; 3) Low fuel warning lamp; 4) EGA
lamp; 5) seat belt lamp; 6) manipulation dot
16 - Not used
17 - Not used
18 - Not used
19 - Lock Status; unlocks functions in range 3-18
19.0 - L-On/L-Off Unlock: press button when "L-Off"
20 - Not used
21 - Software Reset; reset OBC settings
00 - End of test
Part 2 BMW Cooling System Overview with Common Failures for e36, e46, e34, e39
View BMW Repair Tech Tips - follow this link:
This video explores the most common cooling system failures and fixes
including Water Pump, Thermostat Housing, Plastic Pulleys, Coolant Overflow
Tank, and Radiator for the BMW e36, e46, e34, and e39's with all variations
of the M50, M52 or S50US Engines.