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      03-19-2021, 12:45 PM   #36
jeremyuhh
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Drives: 2015 M3
Join Date: Feb 2016
Location: Canyon Country, CA

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Quote:
Originally Posted by Helmsman View Post
Sure coolant temp raise above Tstat (79C) when stand still and stop/go traffic but as soon as you get airflow it should come down to around 80C again. Either Tstat, radiator/air flow (or coolant..?) seems to be failing here.

Quote:
Originally Posted by amrazM View Post
that 206*F is way too high on the coolant temp, that is the direct cause of why the oil temp is so high. My guess would be a blockage or lack of flow.

start by pressure testing the cooling system see if it holds pressure, then check operation of the waterpump and the thermostat. something in that cooling system isnt working
Quote:
Originally Posted by amrazM View Post
could also be possible the cooling system isnt bled properly as I see you mentioned having replaced the radiatior.
Quote:
Originally Posted by Ajolives View Post
I've been told they're self-bleeding, but I still bled mine a couple times after doing my OFHG. Couldn't hurt to bleed.
copy. it was replaced 3 years ago though. Im sure the previous owner would have caught it if the system wasnt bled properly. But is there a possibility of air seeping in some how ?

i have a coolant temp sensor, temp sensor harness, and thermostat on the way. Havent had a chance to pull off my bumper yet.

Also, how long/quicky does it take your guys cars to hit 210F/operating temp ?
I took a short drive this morning from a dead cold start, about 1.5 miles up hill and my needle was already in between the first dot and 210F, closer to 210F.

Also noticed the car hesitating before firing up. about 2 seconds before it turns on. Thinking this is battery or alternator related.

Last edited by jeremyuhh; 03-19-2021 at 01:16 PM..
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