C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Temp Problems

Thread Tools
 
Search this Thread
 
Old Apr 17, 2011 | 11:58 AM
  #1  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default Temp Problems

ok, so i recently replaced the stock heads on my vehicle with a set of ported 853's. I also replaced all the gaskets, oil, and coolant. Car drove fine for a few days but recently it started jumping temp.

Upon starting the car there is usually white smoke until the vehicle is warm. On top of that the temp fluctuates. It used to read 195-200 but now it will read between 215-230. I checked the oil and nothing appears to be getting in it and i had to fill the coolant level once bc it was low.

Im not sure what the problem could be. Any suggestions? I have not yet inspected the radiator to see how clogged it is but the heat issue started right after the heads were installed.

Thanks for the help
Nick
Reply
Old Apr 17, 2011 | 12:03 PM
  #2  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by BLK2000FRC
ok, so i recently replaced the stock heads on my vehicle with a set of ported 853's. I also replaced all the gaskets, oil, and coolant. Car drove fine for a few days but recently it started jumping temp.

Upon starting the car there is usually white smoke until the vehicle is warm. On top of that the temp fluctuates. It used to read 195-200 but now it will read between 215-230. I checked the oil and nothing appears to be getting in it and i had to fill the coolant level once bc it was low.

Im not sure what the problem could be. Any suggestions? I have not yet inspected the radiator to see how clogged it is but the heat issue started right after the heads were installed.

Thanks for the help
Nick
Did you use the service manual procedure to get all the air out of the system? Also, there is a definite difference, between burning off condensation/water vapor (from combustion), and white smoke.
Reply
Old Apr 17, 2011 | 12:12 PM
  #3  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

i honestly took it to a mechanic to do all the work who is experienced with this. I dont know if he followed the proper steps. I just noticed now that the car is eating coolant. It is currently about 1.5 inches below the full when cold line. The first time this happened (about 4 days after heads were installed) i topped it off with distilled water. Is it possible that the water evaporated and that i should just fill it off with dex cool? Like i said the smoke usually happens on a cold start. Could that be a head gasket leak?
Reply
Old Apr 17, 2011 | 12:12 PM
  #4  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

I was told it could be an air pocket but im not sure how exactly that works?
Reply
Old Apr 17, 2011 | 12:52 PM
  #5  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by BLK2000FRC
I was told it could be an air pocket but im not sure how exactly that works?
Until you mentioned that coolant is being consumed, I was thinking an incorrect procedure....in getting the air out. I would check the oil immediately, and see if any coolant is present on the dipstick. Either way, if you are loosing coolant, and have no leaks......it needs to go back to the shop. Just curious, were new head bolts used?
Reply
Old Apr 17, 2011 | 12:57 PM
  #6  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

He used arp head studs. the oil is still clean i wonder is not purging the system correctly could cause this?
Reply
Old Apr 17, 2011 | 01:01 PM
  #7  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by BLK2000FRC
.... i wonder is not purging the system correctly could cause this?
It will not cause the system to consume coolant......UNLESS.....it was never filled to the correct capacity....to begin with. Again, you need to determine if you are truly loosing coolant (no leaks).
Reply
Old Apr 17, 2011 | 01:24 PM
  #8  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

yea i just filled it off with distilled water again. Cold started it and white condensation(or what seems to be) is coming out. It def leaves a big wet spot on the ground so it makes me believe its condensation compared to smoke. If the problem persists im going to take it back to the shop. The oil seems fine. Its not milky at all, but normal in color.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old Apr 17, 2011 | 03:28 PM
  #9  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by BLK2000FRC
yea i just filled it off with distilled water again. Cold started it and white condensation(or what seems to be) is coming out. It def leaves a big wet spot on the ground so it makes me believe its condensation compared to smoke. If the problem persists im going to take it back to the shop. The oil seems fine. Its not milky at all, but normal in color.
I know the weather is getting warmer, but you should be topping it off with a 50/50 mix....not straight water.
Reply
Old Apr 17, 2011 | 05:32 PM
  #10  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

yea thats what i though too. from what other friends were telling me they said water would work but i questioned why not just use the coolent? idk im hoping its not a crack in the heads or something extreme. I did buy them used from a reputable cf member and everything appeared ok. Lucky do you have a link to a step by step on how to purge or burp the coolant system properly? Im going to try that first
Reply
Old Apr 17, 2011 | 05:46 PM
  #11  
Chicago1's Avatar
Chicago1
Race Director
 
Joined: Mar 2008
Posts: 12,413
Likes: 501
From: Rio Rancho NM
Default

Sounds normal to me

I would get a air pressure gun and clean out th condesnor and radiator of the gunk and you should see some better temps.

"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).

This is right from the tech manual.
Reply
Old Apr 17, 2011 | 06:07 PM
  #12  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

im just trying to figure out if the condensation is caused from an air pocket? does that sounds plausable?
Reply
Old Apr 17, 2011 | 06:34 PM
  #13  
sfc rick's Avatar
sfc rick
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2009
Posts: 6,119
Likes: 156
From: Huntington tx
Default

Bet it's a head gasket problem. The engine doesn't "use water" nor do you have to keep filling up. Burping is one thing....white smoke says it's burning water. NOT Normal! Is it burning water all the time even after it's warmed up?

Time to take it back if it's still white smoking....
Reply
Old Apr 17, 2011 | 06:39 PM
  #14  
kp1's Avatar
kp1
Racer
20 Year Member
All Eyes On Me
 
Joined: Aug 2005
Posts: 465
Likes: 16
Default

Head gasket or cracked head.
Reply
Old Apr 17, 2011 | 07:11 PM
  #15  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

It only burns white condesation for the firstl ike 1-2 minutes on a cold start.
Reply
Old Apr 17, 2011 | 07:12 PM
  #16  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

I used brand new ls7 gaskets for the install. That is what i was told to buy. So if that is the problem im guessing somehow they werent aligned correctly.
Reply
Old Apr 17, 2011 | 07:55 PM
  #17  
dougbfresh's Avatar
dougbfresh
Le Mans Master
 
Joined: Nov 2005
Posts: 6,993
Likes: 25
Default

Originally Posted by kp1
Head gasket or cracked head.
Or warped head or not torqued correctly. If your loosing coolant you have a SEALING issue, cooling system pressure test should bear this out.
Reply
Old Apr 17, 2011 | 08:00 PM
  #18  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by BLK2000FRC
...... im hoping its not a crack in the heads or something extreme. I did buy them used from a reputable cf member and everything appeared ok.
....well there is another variable to the equation........
Reply
Old Apr 17, 2011 | 09:56 PM
  #19  
BLK2000FRC's Avatar
BLK2000FRC
Thread Starter
Instructor
10 Year Member
 
Joined: Jul 2010
Posts: 147
Likes: 0
From: Dyer IN
Default

mechanic chose to use ls9 gaskets. He claims that since there are 7 layers they hold up better. I am not sure if this was the right choice instead of the ls1 covers. Anyone have any input on that?
Reply

Get notified of new replies

To Temp Problems





All times are GMT -4. The time now is 07:09 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE