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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 08-11-2012, 10:41 AM   #481
Stinger9
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Quote:
Originally Posted by Vas87 View Post
I just developed a small leak and what would you guys say the bare essentials to be changed over are? Would this $399.95 kit be ok?
http://www.bimmerzone.com/BMW_Parts_...LING-AUTO.html
It's all the right parts, but what is very important to us here is to get the high quality brand name parts.
You must ascertain that each and every part is oe manufactured for max reliability. And do get the optional auto trans thermostat as your old one will likely break.
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Old 08-11-2012, 08:26 PM   #482
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Great thread, very useful, I've had a major leak in my cooling system had to change thermostat housing along with the expantion tank... Now considering a complete overhaul of the cooling system time to save a bit more money then get this done... Again great information!
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Old 08-12-2012, 12:41 AM   #483
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Thanks to the OP for the great parts list. Did this in about 3.5 hours last night, my radiator was clearly leaking. Everything's back to normal now!

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Old 08-14-2012, 05:01 PM   #484
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No problem, guys. Another E46 that shall live to see another day
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Old 08-16-2012, 05:18 AM   #485
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Expansion tank won't come out

I'm having a hell of a time getting the expansion tank out. I removed the clips holding it to the radiator, the bracket and the lower hose. It just will not separate from that bracket. Any helpful hints? Thanks.
T C
BTW, I have a 5 speed manual trans.
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Old 08-16-2012, 08:25 AM   #486
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You pulled the little tab at the bottom left (when you're standing in front of the car looking down) to unlock it? If yes, then pull up. HARD. I struggled until I realized you have to PULL on that sucker. Don't be shy.

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Old 08-16-2012, 09:17 AM   #487
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I found two places on the bottom where I could wedge a large flat head screwdriver in and rock it gently back and forth to break the seal. Go to both front and back and try it. About 5 mins. after you give up, it will give up and finally come loose.

Yanking seems to be the most common approach, but be careful as you could break the ET bracket clips (though I think you have it loose from radiator). Try gentle first...spray wd40 or something up into the large hole at bottom (where that large clip goes over). There's an o-ring in there that will 'bond' from years of crust building up.
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Old 08-16-2012, 09:36 AM   #488
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Just pull. Hard.
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Old 08-16-2012, 10:34 AM   #489
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Thanks guys. Will try some more this morning. Mr Mango, where in So Cal are you? I'm in Costa Mesa.
T C
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Old 08-16-2012, 05:55 PM   #490
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Been dicking with this now for two more hours and the exp tank will not come loose at the bottom. About ready to get an 8lb sledge and beat the $#@% out it. Very maddening. Tried spraying silicone spray on the bottom part, using lg fl hd sd to lever on it. Nothing works, YET.
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Old 08-16-2012, 06:09 PM   #491
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Originally Posted by tcseadoo View Post
Been dicking with this now for two more hours and the exp tank will not come loose at the bottom. About ready to get an 8lb sledge and beat the $#@% out it. Very maddening. Tried spraying silicone spray on the bottom part, using lg fl hd sd to lever on it. Nothing works, YET.
No need for a hammer. Pull up hard while wiggling the tank.
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Old 08-18-2012, 09:03 PM   #492
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I need help locating this leak....
I recently replaced the expansion tank and upper hose with the OEM versions. Not sure why it's still leaking....
I think the source is where the upper hose connects.

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Old 08-18-2012, 10:20 PM   #493
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Hard to say from one pic, but have you checked the threads around the ET cap for traces of leakage? Are you overfilling the coolant level?

Could be even a radiator leak. Especially where the plastic is bonded to the metal.
Best for you would be to do a pressure test on the system with the engine off so you could see and hear without distraction. And avoid the blowing from the fan.

Is this the new ET? I ask to make sure there is not a micro crack.

Last edited by Stinger9; 08-18-2012 at 10:31 PM.
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Old 08-19-2012, 12:24 PM   #494
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Yes, new expansion tank, new upper hose. I'm thinking radiator. Don't think the cap was leaking from the looks of it but I could try replacing it.
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Old 08-20-2012, 01:52 PM   #495
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You're still leaking cause you only replaced two parts. Did you read page 1???
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Old 08-20-2012, 09:21 PM   #496
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Quote:
Originally Posted by Zell View Post
Just ordered my cooling kit.


Item Name Item Price Quantity Item Total
--------- ---------- -------- ----------
07-11-9-963-200-M131 $0.25 1 $0.25
Seal Ring for Block Drain Plug 14x18mm - Brand: Fischer & Plath

----------------------------------------------------------------------
11-51-1-436-590-M253 $26.00 1 $26.00
Water Pump Pulley (Black Anodized Aluminum Version) - Brand: APA

----------------------------------------------------------------------
11-53-7-509-227-M322 $64.25 1 $64.25
Thermostat with Integrated Thermostat Housing (includes gasket), BMW
E46 3 Series, All Except M3, Each Brand: Behr Thermotronic

----------------------------------------------------------------------
17-13-7-553-919-M253 $9.00 1 $9.00
Coolant Level Sender, BMW E46 3 Series, All (1999-05), Each Brand: Uro
Parts

----------------------------------------------------------------------
11-51-7-527-910-M52 $46.00 1 $46.00
Water Pump (uses a composite impeller), BMW E46 3 Series, All Except
M3 (1999-05), Each

----------------------------------------------------------------------
17-11-9-071-518-M6 $148.00 1 $148.00
Radiator, For Manual Transmissions, E46 323i/Ci, 325i/Ci/Xi (through
4/05), 328i (from 10/98), 328Ci, 330i/Ci (through 4/05), 330Xi
(through 4/05) Brand: Behr

----------------------------------------------------------------------
11-53-1-436-408-M21 $27.25 1 $27.25
Lower Radiator Hose (NOTE: Also use water temperature sensor 13-62-1-
433-077-M9), BMW E46 3 Series, All Except M3 (1999-05), Each Brand:
Contitech

----------------------------------------------------------------------
17-12-7-510-952-M21 $30.50 1 $30.50
Radiator Hose, Radiator to Thermostat, BMW E46 3 Series, All Except M3
(1999-05), Each Brand: Contitech

----------------------------------------------------------------------
17-11-1-742-231-M148 $11.75 1 $11.75
Radiator Cap, 2.0 BAR, BMW E46 3 Series, All (1999-05), Each Brand:
Reutter

----------------------------------------------------------------------
17-11-7-573-781-M58 $80.50 1 $80.50
Coolant Expansion Tank (cap not included), BMW E46 3 Series, All
Except M3 (1999-05), Each Brand: OEM

----------------------------------------------------------------------
Shipping for Package 1: $FREE

Total Price: $443.50


All OEM, except for the coolant level sensor and the pulley, but the pulley is aluminum, and I haven't heard of one bad thing about it from any members.

For the level sensor, yeah yeah yeah I know, URO parts suck, but hey it's $9, it's just a sensor, and if it doesn't work it's no skin off my bones. I don't think mine works as it is, anyway. Much cheaper than OE. I can get 3 of them for OE price

I can't wait to get it all installed and have more piece-of-mind when driving. I'll finally stop having to constantly gander at my temperature gauge!

I plan on re-using my temp. sensor since it's working just fine, so I just ordered a new O-ring. P/N for that little guy is 13621743299

My cooling system has lasted me 104,000 miles. All I've got is a minor radiator leak somewhere in it. Takes about 3 months for the level to actually go down noticeably.
Sorry Zell if this has been asked, haven't been on this post lately, but did you say where you ordered your cooling system refresh parts? Thx.
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Old 08-20-2012, 10:33 PM   #497
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I've replaced a ton of parts. Guess it was the only part I haven't. Radiator.
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Old 08-20-2012, 11:00 PM   #498
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Bought my e46 and after 3 weeks of flawless performance my coolant overflow tank exploded. Replaced it and bled the system out following the steps you provided and its running great. One thing you might want to add is that the coolant overflow tank cap. When I replaced my tank I didnt pay it any mind and 2 weeks down the road my car overheated and almost hit red. Luckily I was able to turn the car off leave it in neutral and coast to a stop but when I opened up my tank to check my coolant level I noticed a black gasket like ring floating at the top. It turned out to be the seal that goes around the thread of the coolant cap. Great thread and as a newbie to bimmer ownership I will make sure to follow sound advice. Thanks
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Old 08-21-2012, 01:10 AM   #499
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No problem. And the cap is mentioned in the first post.
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Old 08-21-2012, 10:41 AM   #500
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Quote:
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Sorry Zell if this has been asked, haven't been on this post lately, but did you say where you ordered your cooling system refresh parts? Thx.
Pelican Parts.

Since I've done the refresh everything has been just like it was prior. No issues to report, no leaks that I can see or detect.
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