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Coolant sensor replacement
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2018 F15 X-5 35i 2006 E53 X-5 4.4i Last edited by JNMNL52; 11-01-2019 at 03:41 PM. |
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I think you are barking up the wrong tree.
Your car may not in fact be losing coolant etc etc but, it may be taking too long to heat to the specified temp it's looking for. This would set off the light. Your temp sensor is not misreporting as you stated. Change your thermostat. Sent from my Pixel 2 XL using Tapatalk
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04 E53 4.8 98 E38 4.4 04 Touareg 4.2 (x2) 87 E30 (getting a 4.4/6spd swap) 89 E30, selling it 96 E36 parts car MK2 jetta with a 1.9alh swap 90 XJ Crawler 2000 XJ crawler in the works 63 Ragtop bug 64 Bug 06 F-350 to drag all the above when they brake. |
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2018 F15 X-5 35i 2006 E53 X-5 4.4i |
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You need to see the realtime ect (engine core temp aka coolant outlet temp). You can use a good scanner or use the hidden OBC menu.
The temp indicator on the dash is not remotely a "gauge" and reads noon from about 60 to 110 °C so it is positively useless sending false sense of security most of the time. Watch realtime temp and it should climb quickly to about 90-92C than stay right there. If it doesn't: stuck thermostat is the problem.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
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2018 F15 X-5 35i 2006 E53 X-5 4.4i |
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There are numerous threads and Google pages how to get into the hidden menu. It's different if you habe the high or low cluster.
Search e53 hidden menu. There is a little bit of trick with holding the odometer button and turning on the key. Easy once you learn the tridk.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
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Cold engine prior to start: 7C. The cluster temp gauge was pegged to the left in the blue paint at 10 o'clock. After start: 5 min-41C, 10 min-55C, 15 min-66C, 20 min-74C (temp gauge needle at 12 o'clock), 25 min-81C, 30 min-86C. After idling for 30 min I took the car out on the highway and steady state KTEMP was 90C for an hour commute to work. I assume the 90C operating temp will occur a lot quicker if I started moving in the car after start - which is what I normally do and do not notice the temp gauge in the blue much after start. It appears that the temp sensor on the lower hose is providing accurate information to the thermostat, so I suspect the thermostat is stuck open given the amount of time it took to reach operating temp at idle but I do not have a feel for that. It did not climb quickly at idle as you stated. What are your thoughts?
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2018 F15 X-5 35i 2006 E53 X-5 4.4i |
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When my thermostat was jammed open, it wasn't warm-up time that alerted me to the fact. Rather it was that the KTMP would fall when going down hills etc. Nomal running temp in my M57 is 88Deg.C. and I'd see the KTMP fall to 65Deg.C. when going down hills at highway speeds, even after the engine was (had been) to full temp. Too much cooling when the engine thermal load dropped off and the thermostat wasn't closing to maintain the KTMP.
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Wayne 2005 BMW X5 3.0d (b 02/05) 2001 BMW F650GS Dakar (b 06/01) |
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2018 F15 X-5 35i 2006 E53 X-5 4.4i |
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2018 F15 X-5 35i 2006 E53 X-5 4.4i |
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