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Engine temp going over 210?

loww02
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loww02 Enthusiast

loww02

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Posted

I just purchased a 2018 Silverado crew cab z71 with the 5.3 about a month ago and I have put about 1500 miles on it. This weekend I noticed when I was driving to and home from the desert that my temp would go a little over 210 while on a hill, and as soon as I would get to a less aggressive grade the temp would drop back down to 210 within seconds. The highest it has gotten was about 220, and I'm just wondering if this really is normal. I had a 2002 Silverado and it never went past 210, even when it was over 100 degrees out. 

m3n00b Enthusiast

m3n00b

Posted
Posted
I just purchased a 2018 Silverado crew cab z71 with the 5.3 about a month ago and I have put about 1500 miles on it. This weekend I noticed when I was driving to and home from the desert that my temp would go a little over 210 while on a hill, and as soon as I would get to a less aggressive grade the temp would drop back down to 210 within seconds. The highest it has gotten was about 220, and I'm just wondering if this really is normal. I had a 2002 Silverado and it never went past 210, even when it was over 100 degrees out. 
Welcome to having a real coolant temp gauge. Perfectly normal.

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Grumpy Bear Senior Enthusiast

Grumpy Bear

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Posted

Factory thermostat trigger temperature is 207 F with a +/-3 error. Don't kid yourself the oil temp is a good deal hotter. :lol:

crankman Enthusiast

crankman

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Posted

Im a little surprised it would move at all. I have never seen mine moved even towing. I have a 1500 and a 2500 never seen the temp budge even hills or flat. Not sure what to tell you. 

Bigmac Enthusiast

Bigmac

Posted
Posted

My 2017 6.2 Max tow runs hotter towing then did my 2015 5.3 by a noticble margin but not alarming as it cools when the fans kick in. 

gone_fishing Enthusiast

gone_fishing

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6 hours ago, Grumpy Bear said:

Factory thermostat trigger temperature is 207 F with a +/-3 error. Don't kid yourself the oil temp is a good deal hotter. :lol:

On my Sierra my oil temps are generally the same or lower then the engine coolant temps. I have a ScanGauge II monitoring engine oil temps. Normal highway driving (no towing) I see around 200F during the summer (190's winter). Towing 3000 lb boat in 5th gear I might see 215F. Everywhere I drive is generally flat so towing up grades would probably be a little higher. I believe all the EcoTec3 V8 engines have oil coolers (not sure about the V6).

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

I never notice mine moving even when towing up hills in the summer with the a/c on. Trans temp is another story however.

Oil coolers are standard with both the basic and max tow packages.


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  • 4 years later...
16LT4 Enthusiast

16LT4

Posted
Posted (edited)

It’s fine. My car’s normal ECT is 220-230*F. Boiling point is ~260*F on your engine. No worries. 
 

There’s much less air on “the pass” than at sea level, which means less heat transfer. 

Edited by 16LT4
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Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
1 hour ago, Brandon Ure said:

My 2016 Sierra was creeping up on 230 going over the pass. Came down as soon as the hill was breached, but makes me sweat a little. Any suggestions?

 

High heat makes a motor more thermally efficient but it doesn't make it more reliable. Heat is the enemy of reliability. For decades the design of cooling system utilized 180 F thermostats and radiators large enough to maintain that temperature. Then for some time it was 192 F and now..............

 

Question: What effect does heat have on oils viscosity? What effect does viscosity have on mechanical reliability? If you know the answers to those two the you have to ask yourself what it means for a motor whose specifications include both a 207 F thermostat AND 0W20 oils? 🤔

 

Normal? To the design it is. To longevity it isn't. You get to choose. How happy for you, right? 

 

It may seem I didn't answer your question but within this reply is every piece if information you asked for and more. 

 

 

 

 

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