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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 07-21-2013, 08:23 AM   #201
Sansho
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Silicone lube/paste is great stuff, however, I no longer use it on o-rings that seal against antifreeze. One time I used silicone paste on a VW thermostat o-ring, and it wouldn't seal properly and leaked. So I stick with antifreeze as a lube on the water pump o-ring, which works fine.
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Old 07-21-2013, 08:47 AM   #202
Chris3Duke
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O-ring is the only "gasket" on an e46, as I recall. For o-ring lubricant I've used antifreeze mixture.
This is what I did. Had no problem.
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Old 07-21-2013, 11:13 AM   #203
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Re: DIY: Stewart Water Pump + Expansion Tank + Coolant Change + 2 Tensioner Pullies

Replaced my control arm bushings. Eliminated the shudder I was feeling and stiffened up the steering. Click image for larger version

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Old 07-21-2013, 01:00 PM   #204
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That's great, however, how does that relate in this post that covers cooling system components? Maybe posted to the wrong thread?
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Old 11-01-2013, 07:44 PM   #205
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Just finished replacing the expansion tank and thermostat...the longest part was getting the expansion tank off...what a pain...till you figure it out. I opted to take the tank holder out too..as the bottom was stuck pretty good and i didn't want to break it. Flat head to pull up the tab on the holder and out it all came. Bottom heater return and electrical connector had to be removed. Hope that helps....
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Old 11-02-2013, 03:06 AM   #206
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Just finished replacing the expansion tank and thermostat...the longest part was getting the expansion tank off...what a pain...till you figure it out. I opted to take the tank holder out too..as the bottom was stuck pretty good and i didn't want to break it. Flat head to pull up the tab on the holder and out it all came. Bottom heater return and electrical connector had to be removed. Hope that helps....
mgzzcool, what lubricant did you use on the thermostat gasket? Although it has been answered, and I have tried using Antifreeze twice on my thermostat gasket, but it still leaks. So, would appreciate your response.
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Old 11-02-2013, 12:32 PM   #207
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Unless using gasket sealer, use Silicone O-ring lube. Makes your life so much easier and a tube will last for many years.

This stuff is great: http://www.agscompany.com/lubricants/automotive/168

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Old 11-02-2013, 02:05 PM   #208
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Silicone grease works better than coolant for lubing the cooling system o-rings. A little goes a long way.
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