Engine temp
Thread Starter
2nd Gear
Joined: Aug 2010
Posts: 2
Likes: 0
Engine temp
I HAVE A 94 c4,Engine temp will go as high as 240+ deg's ,both fans work, first fan on at 225,second on at237 also new thermostat,new water pump is there some thing I am missing.Please help!
Safety Car
Joined: Sep 2002
Posts: 4,971
Likes: 9
From: The reason time exists is so everything doesn't happen at once
Are you sure the coolant is full? Do you get a "low coolant" light? Also, check for debris between the radiator and a/c condenser. Lots of crap can get caught in there. One plastic bag will do the trick.
Safety Car
Joined: Aug 2006
Posts: 4,147
Likes: 452
From: Port St. Lucie West Florida
you have to get rid of the air pockets and the radiator should be inspected for road debris. Is the temp this high when cruising or in traffic? If in traffic what is the cruising temp. should be approx 200 deg range give or take a few deg. with the stock setting and thermostat-(180dg.)
Last edited by enventr; Aug 13, 2010 at 02:16 AM.
Safety Car
Joined: Jan 2004
Posts: 3,759
Likes: 8
Yeah, your temps are too high. Your 2nd fan really should never come on.
I'd check to make sure you have enough water and not too much antifreeze as you want a 50/50 mix. And also make sure to burp the system to get rid of any air that may be in the system.
Other than that. I'd look to make sure the area between the condenser and radiator is clear. And I'd check out the radiator to see if it is clogged. If you don't mind spending the money and don't know how old the radiator is. It may be a good time to replace it and flush the coolant and fill with 50/50.
I'd check to make sure you have enough water and not too much antifreeze as you want a 50/50 mix. And also make sure to burp the system to get rid of any air that may be in the system.
Other than that. I'd look to make sure the area between the condenser and radiator is clear. And I'd check out the radiator to see if it is clogged. If you don't mind spending the money and don't know how old the radiator is. It may be a good time to replace it and flush the coolant and fill with 50/50.
Melting Slicks
Joined: Mar 2008
Posts: 2,351
Likes: 222
From: Delta B.C. Canada
2023 C7 of the Year Finalist - Unmodified
2019 C4 of Year Finalist (appearance mods)
2015 C4 of Year Finalist
Yeah, your temps are too high. Your 2nd fan really should never come on.
I'd check to make sure you have enough water and not too much antifreeze as you want a 50/50 mix. And also make sure to burp the system to get rid of any air that may be in the system.
Other than that. I'd look to make sure the area between the condenser and radiator is clear. And I'd check out the radiator to see if it is clogged. If you don't mind spending the money and don't know how old the radiator is. It may be a good time to replace it and flush the coolant and fill with 50/50.
I'd check to make sure you have enough water and not too much antifreeze as you want a 50/50 mix. And also make sure to burp the system to get rid of any air that may be in the system.
Other than that. I'd look to make sure the area between the condenser and radiator is clear. And I'd check out the radiator to see if it is clogged. If you don't mind spending the money and don't know how old the radiator is. It may be a good time to replace it and flush the coolant and fill with 50/50.
I did a full flush, new rad, 180 stat, 50/50 coolant with Water Wetter, and I now rarely go over 200 deg. I didn't have much obvious junk behind the rad, but the fins were pretty clogged with the fine stuff that collects in there over the years.
Race Director
Joined: Dec 2000
Posts: 17,551
Likes: 26
From: El Paso Texas
As the guys above stated, C4 Corvette are "bottom feeders"....ie...they draw cooling air (and whatever else they can inhale) from the ground. Over time, a large amount of debris can lodge itself in front of the radiator. Like JRZ stated, one plastic bag and you could loose 25% of your airflow. I suggest pulling the radiator out and sitting down with a bucket of soapy water, a stiff bristled brush, a fin straightener, and a couple of cold beers and going to town on the radiator. Put it back in, refill and burp all of the air out.
When I had my 84, cleaning the front of the radiator dropped operating temps by nearly 20 degrees. I was amazed what was stuck in front of it.
When I had my 84, cleaning the front of the radiator dropped operating temps by nearly 20 degrees. I was amazed what was stuck in front of it.
Drifting
Joined: Dec 2007
Posts: 1,647
Likes: 4
From: Argillite KY
With my A/C off mine will go upwards of 230 if it really hot outside. (Like the past month
) If I run my A/C the temp will occasionally get to 205 if it's 95 outside and I'm stuck in traffic. Once I'm rolling about 55 it goes back down to 185-190. I have a 180 stat. I've asked some of these fine folk and they seem to think that's just about right.
) If I run my A/C the temp will occasionally get to 205 if it's 95 outside and I'm stuck in traffic. Once I'm rolling about 55 it goes back down to 185-190. I have a 180 stat. I've asked some of these fine folk and they seem to think that's just about right.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Pro
Joined: May 2006
Posts: 604
Likes: 1
From: LaSalle Ontario
