S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Is there supposed to be an o-ring on the temp sensor on lower rad. hose?

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Old 04-14-2008, 07:19 PM
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Default Is there supposed to be an o-ring on the temp sensor on lower rad. hose?

The last thing I need to do before starting my car after 2 weeks of work and waiting is fill the radiator, but the temperature sensor will not seal... I think I lost a damn o-ring somehow!
Old 04-14-2008, 07:43 PM
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yes, it needs an o-ring
Old 04-14-2008, 07:49 PM
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Daaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaamn iiiiiiiiiiiiiiiiiiiiiiiiiiiiit
Old 04-14-2008, 08:13 PM
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did it stay in the hose or on the sensor?
Old 04-14-2008, 08:21 PM
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Default Got it!

I searched everywhere and then went back and searched my drain pan again, since I thought that was the most likely place it would end up - Sure enough it was in there! I had to hold the (transparent) pan up over a 500 watt work light and only then was just BARELY able to make out the circle shape through the murk of the old coolant (that stuff was nasty!)

I was really worried it fell into the lower rad hose and I was going to have to completely disassemble the rad support again to fish around in there.

Disaster averted, thanks guys!
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