M42club.com - Home of the BMW E30/E36 318i/iS
DISCUSSION => Engine + Driveline => Topic started by: dkbmxer002 on August 09, 2009, 09:01:50 PM
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so i am in the process of replacing my thermostat on my 91 318is and i discovered there is a aluminum metal disc that was loose where the thermostat goes into the head... what is it? it appears to screw in or just push in. wasn't sure if this is normal or what?