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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 03-24-2013, 03:11 PM   #1
erich330ci
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Join Date: Jan 2013
Location: Baltimore, MD
Posts: 155
My Ride: 2004 330ci
Water Pump & Thermostat Installation

i've seen a few people use some type of sealant on water pump and/or thermostat installations, but not everyone. What do you all recommend? Use a sealant or just stick with the O-ring and gasket?

Thanks.
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Old 03-24-2013, 03:52 PM   #2
paraklas
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Join Date: Jan 2006
Location: Cyprus
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My Ride: ESS TS2 320ci
o-ring for the WP with some non-diluted OEM coolant on the o-ring for lubrication/sealing

Thermostat with thermostat-safe RTV sealant. The gasket around the housing is just too thin and IMO will start leaking at some point. I have the RTV + new t-stat for over 4 years without any issues
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