Is my engine over heating??

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Nov 26, 2008 | 08:03 AM

Borrega

Thread Starter

Racer

Joined: Nov 2008

Posts: 265

Likes: 1

From: houston tx

Is my engine over heating??

Not really sure why but my temp. moves to 240! is it because it needs change of antifreeze or new thermostat! help please

Nov 26, 2008 | 08:07 AM

damilleniumboy

Le Mans Master

Joined: Jun 2007

Posts: 6,301

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From: LAND OF OZ Kansas

You need to look at and clean your radiator. It's probably clogged with junk that it has vaccumed in to the fins over time.

Nov 26, 2008 | 08:24 AM

stormrider

Melting Slicks

Joined: Feb 2006

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From: Sarasota Florida

Quote:

Originally Posted by damilleniumboy

You need to look at and clean your radiator. It's probably clogged with junk that it has vaccumed in to the fins over time.

Nov 26, 2008 | 08:49 AM

MIKE-C5

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Joined: Jan 2003

Posts: 19,802

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From: San Antonio Texas

St. Jude Donor '05-'06-'08

Quote:

Originally Posted by damilleniumboy

You need to look at and clean your radiator. It's probably clogged with junk that it has vaccumed in to the fins over time.

Many Corvettes overheat because they get junk in front of the radiator ! !

Nov 26, 2008 | 08:55 AM

steve8

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From: Central Ma

Quote:

Originally Posted by damilleniumboy

You need to look at and clean your radiator. It's probably clogged with junk that it has vaccumed in to the fins over time.

Definitely a good place to start. A lot of crap can accumulate there.

Nov 26, 2008 | 09:01 AM

BT-01-vette

Le Mans Master

Joined: Jan 2002

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From: Camden County NJ

Quote:

Originally Posted by damilleniumboy

You need to look at and clean your radiator. It's probably clogged with junk that it has vaccumed in to the fins over time.

needs to be done after the leaves fall. You would not believe how much gets sucked up there!!

Nov 26, 2008 | 09:19 AM

itzza427

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Joined: Sep 2007

Posts: 7,604

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From: Belleville Il

You weren't Very clear in your post,,what conditions is it reaching this temp? All the time,sitting in traffic on a hot day and so on. According to the tech guys in the corvette magazines 240 isn't all that high under certain conditions. That said

check the radiator/AC condenser fins for junk. You always want maximum air flow through there!!

Nov 26, 2008 | 09:57 AM

Dominic Toretto

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Joined: Jul 2007

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From: 972 and 405

I will be looking to do the same thing also. Mine does not reach that temp but it is getting hotter than I care for. I actually took a look around yesterday to see how to get to it, Chevy covered the radiator up pretty nice so it will probably take awhile to get to it.

-Alex

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Nov 26, 2008 | 01:22 PM

BT-01-vette

Le Mans Master

Joined: Jan 2002

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From: Camden County NJ

Quote:

Originally Posted by AlexSmith

Drive up some ramps and look from underneath. I use a long thin stick and carefully waved it from right to left to removed the build up of leaves and etc.

Nov 26, 2008 | 01:29 PM

#10

RLYSLO

Drifting

Joined: Nov 2006

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From: Plano Texas

St. Jude Donor '08

Quote:

Originally Posted by AlexSmith

you can remove the air intake bridge and then the radiator upper support cover to get in there.

Nov 26, 2008 | 01:34 PM

#11

Bill Dearborn

Tech Contributor

Joined: Oct 1999

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From: Charlotte, NC (formerly Endicott, NY)

You need to explain more of the operating conditions. It is possible to see 240 or more when in traffic or where the car isn't moving much. If your temperature is normal 190 to 200 while driving at 55 to 60 your cooling system is OK.

Here is how the fans operate:
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).

Bill

Nov 26, 2008 | 01:44 PM

#12

Vetteman Jack

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That is a bit high on the temp. I agree with looking at the radiator area under the front fascia and see if debris is there. If not, then check further in the system.

Nov 26, 2008 | 02:22 PM

#13

peter pan

Life Time NCM #2196

Joined: Sep 2004

Posts: 82,599

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From: Converse TX

Quote:

Originally Posted by MIKE-C5

Many Corvettes overheat because they get junk in front of the radiator ! !

Nov 26, 2008 | 02:48 PM

#14

DeeGee

Tech Contributor

Joined: Dec 2003

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From: Horncastle Lincolnshire, England

2023 C5 of the Year Finalist - Unmodified

I imported a Walmart plastic bag into England in my air intake

Nov 26, 2008 | 03:00 PM

#15

damilleniumboy

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Joined: Jun 2007

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From: LAND OF OZ Kansas

There was a forum member that had a frog stuck in his. It was on a recent post.

Nov 26, 2008 | 05:17 PM

#16

Borrega

Thread Starter

Racer

Joined: Nov 2008

Posts: 265

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From: houston tx

WEll im in houston so the weather is good condition in 70s an when i drive it goes down no normal 220degrees but when i slow down or stop it goes up too 240degrees!

Nov 26, 2008 | 05:20 PM

#17

Dominic Toretto

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From: 972 and 405

Quote:

Originally Posted by Borrega

WEll im in houston so the weather is good condition in 70s an when i drive it goes down no normal 220degrees but when i slow down or stop it goes up too 240degrees!

I would be concerned about a normal driving temp of 220F. I know it can do that, but I usually turn on my heater to keep it around 198-205F. Maybe I am paranoid.

-Alex

Nov 26, 2008 | 05:33 PM

#18

sneakelman

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Joined: May 2007

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From: hagerstown md

St. Jude Donor '08-'09

Quote:

Originally Posted by Borrega

WEll im in houston so the weather is good condition in 70s an when i drive it goes down no normal 220degrees but when i slow down or stop it goes up too 240degrees!

Quote:

Originally Posted by AlexSmith

I would be concerned about a normal driving temp of 220F. I know it can do that, but I usually turn on my heater to keep it around 198-205F. Maybe I am paranoid.

-Alex

220 is way above average operating temps for me. I usually run about 194-196 degrees with the stock thermostat. But mine has been tuned so that the fans will both kick on if it hits 200. Highest I've seen mine is about 215 or so. And that was sitting in traffic, AC on, hotashell outside.

Nov 26, 2008 | 06:40 PM

#19

damilleniumboy

Le Mans Master

Joined: Jun 2007

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From: LAND OF OZ Kansas

Quote:

Originally Posted by 2000lambovette

Went under the car yesterday to change the oil. I looked up into my radiator area and saw this frog all dried up. I`ve had lots of other things caught up in there but never a frog, maybe its time for the mesh cover.

check this thread
http://forums.corvetteforum.com/c5-g...er-a-frog.html

Nov 26, 2008 | 07:52 PM

#20

dobewillie

Race Director

Joined: Mar 2006

Posts: 10,477

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From: lockport n.y

a lot of good suggestions many of the post could be the cause start with inspecting and cleaning the rad check fluid level and condition of anti freeze good luck

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