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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 06-19-2012, 01:29 PM   #361
boatshoe
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Will I need to bleed after opening the expansion tank cap just to check the level? Air escaped when I removed the cap as usual, then I screwed the cap back on. Do I need to bleed?
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Old 06-19-2012, 02:08 PM   #362
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Will I need to bleed after opening the expansion tank cap just to check the level? Air escaped when I removed the cap as usual, then I screwed the cap back on. Do I need to bleed?
Nope.

Last edited by ShootyzGruve; 06-19-2012 at 02:16 PM.
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Old 06-21-2012, 08:36 AM   #363
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aux fan switch


Righteous call Mango!!! 18.02 spent and 15 minutes of actual work.

Thanks for the assist!!
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Old 06-21-2012, 09:40 AM   #364
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Will I need to bleed after opening the expansion tank cap just to check the level? Air escaped when I removed the cap as usual, then I screwed the cap back on. Do I need to bleed?
As shorty said, correct. Opening the cap does not aerate the water.

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Righteous call Mango!!! 18.02 spent and 15 minutes of actual work.

Thanks for the assist!!


No problem!
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Old 06-21-2012, 11:56 AM   #365
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Righteous call Mango!!! 18.02 spent and 15 minutes of actual work.

Thanks for the assist!!
Now time to hit the extra 2 pnts with a rebound of the entire cooling system!
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I used to drive fast and cowboy around, but then I realized that I can't even afford bumping into someone, so now it's slow and classy, with occasional spurts of speed. Fanatics might pick on each other from time to time, but we are all one great big family that looks out for each other in the end.
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323i brakes & rotors
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Old 06-23-2012, 03:59 PM   #366
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Great thread, especially since I need to do this (second time!) and replace the radiator. I noticed your list doesn't include any gaskets or o-rings though. For example, there's no thermostat housing gasket in the list. Is that because the parts you've listed already include it?

Neil
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Old 06-24-2012, 01:33 PM   #367
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Typically the thermostat comes with a gasket already in place.

What other gaskets do you have in mind?
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Old 06-26-2012, 03:15 PM   #368
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So on an auto, there's no need to order the t-stat or expansion tank mounting plate noted in the first list, just get those listed in the "auto's only" list?
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Old 06-26-2012, 03:20 PM   #369
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So on an auto, there's no need to order the t-stat or expansion tank mounting plate noted in the first list, just get those listed in the "auto's only" list?
Some people break/destroy the auto t-stat upon removal. Same with the mounting plate. buy them and return them if you don't think you need them afterward. if you can afford it, go for it. They aren't absolutely vital though AFAIK. The auto guys might know better.
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Old 06-26-2012, 03:42 PM   #370
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Awesome! I just wanted to make sure that the ones from the "auto" list were the only ones I needed, vs getting dupes of the ones meant for the manual cars from the list above. Thanks for the awesome thread too, Mango! I've killed for such attention to
detail in a service manager at some of the repair shops I've worked at!
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Old 06-26-2012, 03:46 PM   #371
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Awesome! I just wanted to make sure that the ones from the "auto" list were the only ones I needed, vs getting dupes of the ones meant for the manual cars from the list above. Thanks for the awesome thread too, Mango! I've killed for such attention to
detail in a service manager at some of the repair shops I've worked at!
No problem and yes... unfortunately that is hard to come by sometimes
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Old 06-26-2012, 05:33 PM   #372
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Cooling - Read Guide but Need More Info

So I've read into the cooling guide extensively on this forum and it's been very helpful.

I just have a very simple question. Is there any way I could know if the previous owner replaced anything?

I just bought the car a few weeks ago and the Carfax and there are extensive records. However, many of them simply state "vehicle serviced."

(It notes the water pump was replaced and cooling system checked at 26,000 miles, it now has 122,000.)

Because the majority of the comments are very vague, I don't know what was actually serviced with a lot of these records. If I were to call the dealership(s) the car was serviced at, would they be able to tell me if the cooling system was replaced? I know there are some privacy laws so I'm not sure if this is feasible.

I realize I'll probably get a lot of responses saying, "just fix it..." which I'll do if I cannot find proof that it has been done recently.

Thanks for the help.
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Old 06-26-2012, 05:47 PM   #373
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If it's close enough, I'd go to the dealership and ask for a print out. I did and got lucky, but others have reported that they were turned away.

Can't hurt to ask.
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Old 06-26-2012, 06:11 PM   #374
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I would just replace everything. Some parts like the expansion tank and radiator have date stamps on white stickers. Look closely. For the radiator, remove the air intake scoop. The sticker should be right on top of the radiator. Almost nobody replaces their radiator though. If your car has over 100k miles, the expansion tank was probably replaced as they're known to fail between 80 and 90k. If they're there and 3 years old and newer, then I'd say you're OK with keeping them. If not, then history is unknown and so will be the reliability of your cooling system.

Sometimes, confidence is worth the extra few dollars.
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Old 06-26-2012, 06:25 PM   #375
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Thanks for the help Mango. I'll check everything out but, as you recommend, I'll probably just end up replacing.

I learned my lesson after not keeping up on my 1.8T Passat properly. Not doing $500 maintenance ended up ruining the engine. Not worth it.
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Old 06-26-2012, 06:47 PM   #376
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Thanks for the help Mango. I'll check everything out but, as you recommend, I'll probably just end up replacing.

I learned my lesson after not keeping up on my 1.8T Passat properly. Not doing $500 maintenance ended up ruining the engine. Not worth it.
Let me guess. Timing belt?
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Old 06-26-2012, 06:56 PM   #377
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Let me guess. Timing belt?
Oil sludge.

Could have gotten everything flushed out but there were no signs of a problem, so I just ignored it.

A few months later the oil pressure light came on and the engine was fried within a few seconds.
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Old 06-27-2012, 04:51 PM   #378
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Where is a whole cooling system replacement DIY? or more specifically, how to removed the radiator, as i found a few random DIYs that cover the ET and WP. I just ordered my whole cooling system and then some and it came in, should be getting it done friday.
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Old 06-27-2012, 05:09 PM   #379
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Where is a whole cooling system replacement DIY? or more specifically, how to removed the radiator, as i found a few random DIYs that cover the ET and WP. I just ordered my whole cooling system and then some and it came in, should be getting it done friday.
Sorry can't help you there. Search around on Google.. you'll find it. I'll just stress to triple-check everything you do, take breaks, and work slowly. Rush into anything and you'll have problems.
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Old 06-27-2012, 11:31 PM   #380
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Cool. Just replaced all the pulleys, and belts and the heater valve that didnt fix my AC issue, but ill get to it and update I been researching this overhaul for weeks.
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