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Message: <blockquote data-quote="Tazza" data-source="post: 17882" data-attributes="member: 82">As Ken said, it could be your thermostat is stuck open this will not let it get to temperature and on cold days it will be even worse. I'd swap out the thermostat then you should be good to go. I know you changed it already but it may be faulty? My 743 does this too, it stays cold for AGES and its a new thermostat, all i can think is it may be faulty.I'd be very careful blocking the rad, its a good test but i wouldn't do more than use it to test. As you said your oil cooler is behind it but if it gets too hot you will be alerted there is an oil temp sender. Honestly its best for the engine to run colder than hotter, gets too hot and you will crack the head.</blockquote>