Average engine temperature range

Tiny
JOHN1776
  • MEMBER
  • 2007 CHRYSLER SEBRING
  • 2.7L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 96,000 MILES
I have been off the wrenches for a decade. This motor was new when I left, but a known problem.

Having problems with overheating, just got it.
Heads seem to test fine. Was told water pump was replaced. I just did thermostat, read cap, and bleed.
Runs right at middle on gauge. Fans on low. Drive and let idle for about an hour. No overheat, at this moment.
Any advice about average operating temperature? I am in central Florida. If it is still too hot, any ideas?
Thanks in advance.
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Thursday, July 6th, 2017 AT 11:12 AM

11 Replies

Tiny
HMAC300
  • EXPERT
Remember the system is pressurized first off. Average temperature should be in 195-210 with a 195 stat in it. But a lot of auto gauges are notoriously off so use a infra red one from auto parts on top hose if it goes above 230 -250 then it is a problem.
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Thursday, July 6th, 2017 AT 12:24 PM
Tiny
JOHN1776
  • MEMBER
I will check. Thanks.
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Thursday, July 6th, 2017 AT 12:43 PM
Tiny
JOHN1776
  • MEMBER
Have now driven vehicle. A/C cool, low cooling fan is on. High came on while car was sitting, but only for a minute period. Gauge is at half way, maybe just slightly above. Seems half while driving. Nervous about driving it due to aluminum block. I know they have head gasket issues, cannot afford that right now. Will check house temperature Saturday when I get home from TOD. Anything else I should check. My Isuzu runs C to 1/4, my daughter's Saturn Ion about 1/4 - 1/2, my 440 runs around 180 give or take. Any recommendations appreciated. My wife's car, cannot leave her stranded. Add extra push fan?

Thanks again.
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Thursday, July 6th, 2017 AT 2:00 PM
Tiny
JOHN1776
  • MEMBER
Is there more than one thermostat? Do not remember this engine having two, but see posts stating there are. If so, where is the other one?
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Thursday, July 6th, 2017 AT 2:02 PM
Tiny
KEN
  • ADMIN
Hello,

There is only one thermostat at the lower hose. It sounds like it is running normal. Try to check the heat at the upper radiator hose.

https://www.2carpros.com/articles/how-to-use-an-infrared-temperature-meter

Please let us know what happens, we are interested to see what it is.

Cheers, Ken

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Friday, July 7th, 2017 AT 11:18 AM
Tiny
JOHN1776
  • MEMBER
Will do Ken, thanks. By the way this site is great :)
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Friday, July 7th, 2017 AT 3:37 PM
Tiny
KEN
  • ADMIN
We are glad you like it. I like it too :)
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Monday, July 10th, 2017 AT 10:23 AM
Tiny
JOHN1776
  • MEMBER
So update. No access to an infrared thermometer. Drive car for a bit. Only a little over 1/2 gauge.
Wife drove and stated the following.
(Interstate driving) With AC on high car started to get hot and at 3/4 gauge. Turned on heat and went to half and was fine. Later, drove with AC @ 1 and vehicle was at half and fine the whole trip. Even went through a drive through.
I'm at a loss. Any recommendations? Sell it?
Thanks.
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Monday, July 10th, 2017 AT 5:20 PM
Tiny
KEN
  • ADMIN
The car might be fine, is it overheating or the gauge says its hot? Really need the infrared to see.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please let us know what happens.

Cheers, Ken
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Monday, July 10th, 2017 AT 7:47 PM
Tiny
JOHN1776
  • MEMBER
Actually overheats. No access to a thermometer. Checked parts store and they dont have one.
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Tuesday, July 11th, 2017 AT 1:01 PM
Tiny
KEN
  • ADMIN
If it overheats then no need for one. Lets check for a blown head gasket . Here is a couple of guides that can help confirm the problem.

https://www.2carpros.com/articles/head-gasket-blown-test

and

https://www.2carpros.com/articles/engine-overheating-or-running-hot

You can get anything you need from Amazon.

https://www.amazon.com/OEMTOOLS-27145-Block-Tester/dp/B004FELK6A

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken

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Tuesday, July 11th, 2017 AT 4:43 PM

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