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Temp Gauge in the Red

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Old Dec 8, 2010 | 09:27 PM
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Default Temp Gauge in the Red

Temp gauge in the red. Ok so this is my second sc300. So, I am not stranger to the car. However, I am a stranger to this problem. So I changed out the radiator which was filthy and need to be changed anyway. The fan clutch was out, changed that. Replaced the thermostat. Meter is still reading in the red! Why is this happening?! I've been assured by a mechanic that the car is not actually over heating. Anyone have this problem or have had this problem?! Than you!
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Old Dec 8, 2010 | 09:30 PM
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blown head gasket maybe. any oil in the coolant or vise versa? maybe just a bad temp sensor
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Old Dec 8, 2010 | 09:34 PM
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Guess i`ll have to do a block test lol
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Old Dec 8, 2010 | 10:45 PM
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Any steam coming from the engine? Water in the oil? Milky oil? Rotten egg smell after car is at operating temp? Steam/smoke from the tail-pipe? If so, what color? Has it been like that since you got the car? Cluster ever been removed or tampered with?

A bad temp sensor wont register on the gauge, it will simply stay at its lowest point. There are several questions that need to be answered before jumping to a blown headgasket, not to mention the sensory side effects associated with a BHG (i.e.-smells, seeing steam/smoke, hearing the car running on a dead cylinder, etc.).
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Old Dec 9, 2010 | 06:32 AM
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No steam. No egg smell. No smoke coming out tail pipe. No water in oil. No milky oil. No smoke. It has been doing it since I purchased the vehicle. The cluster has been tampered with. Not while in my possession. Only reason I know so is because the clips at the top of the cluster are gone lol.
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Old Dec 9, 2010 | 07:06 AM
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when you installed the new radiator did you bleed the coolant system?
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Old Dec 9, 2010 | 07:11 AM
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Yes I did.
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Old Dec 9, 2010 | 07:40 AM
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Well if the car is definitely "not overheating" in technical terms, then there is an issue with the gauge. Do you have a buddy that you can swap the gauges with just to check? Unfortunately this is going to be a process of elimination.
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Old Dec 9, 2010 | 10:28 AM
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I would guess that maybe the gauge needs to be fixed if the car isn't actually overheating.
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Old Dec 9, 2010 | 11:28 AM
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Sadly, after hurricane Katrina, sc's are hard to come by in new orleans. So I wouldn't be able to have access to one temporarily. What a nightmare!
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Old Dec 9, 2010 | 11:41 AM
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Originally Posted by Nolamatt
No steam. No egg smell. No smoke coming out tail pipe. No water in oil. No milky oil. No smoke. It has been doing it since I purchased the vehicle. The cluster has been tampered with. Not while in my possession. Only reason I know so is because the clips at the top of the cluster are gone lol.
^^That right there. I would be willing to bet money that when it was removed, the needle was moved by hand. I would say there is a 99% chance you have nothing to worry about except how to set the needle back to where it should be.
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Old Dec 10, 2010 | 12:13 PM
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Thank you turbo! Any advice anyone can tell me about taking the cluster out? Never messed with it before
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Old Dec 10, 2010 | 12:59 PM
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Does the upper radiator hose feel hot while the car is running? My car wasnt cycling antifreeze through the upper hose so it was overheating. Just throwing ideas out.
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Old Dec 10, 2010 | 01:07 PM
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Originally Posted by Nolamatt
Thank you turbo! Any advice anyone can tell me about taking the cluster out? Never messed with it before
Best I can do for that one is:

https://www.clublexus.com/forums/sc-...-lighting.html

https://www.clublexus.com/forums/sc-...d-threads.html

First link tells you how to remove the cluster, but not pics. Second link is just a few links to every DIY you would ever need and more.
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Old Dec 11, 2010 | 12:37 AM
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Thank you! I'll go over those links, and let everyone know how it came out! Thank you again CL...(and turbo)
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