LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Weird Overheating Issue

Thread Tools
 
Search this Thread
 
Old Nov 6, 2010 | 07:27 PM
  #1  
Dmaleck's Avatar
Thread Starter
Launching!
iTrader: (6)
 
Joined: Aug 2008
Posts: 220
Likes: 0
From: Spangdahlem AB,Germany
Default Weird Overheating Issue

I'll start off by saying thanks for any help in advance you guys and girls have helped me out on more then one occasion!
So here's my problem....
Earlier today I went to pick up my friend to goto the gym, when I parked I noticed my fans were still running which has never happened before. I checked my temp and sure **** it was almost in the red... So i went inside did my workout and everything to let it cool down and went back, started it up and at an idle it just kept rising past the centerline of the guage. I shut it off again and let it cool down...

Started it again and popped the hood and felt both hoses while running..both were soft and very hot and i couldnt tell if fluid was moving through or not. I then open the bleed valve and nothing came out for 3-4 secs then a constant stream came out. While it was running i decided to just give it some gas and when I did the temp went down right awayto normal. when I let it idle it goes back up and drops when I hit the gas?

Problem is Its hard for me to check thermostat and stuff cause I just moved to Luke AFB and have 0 tools (except a screwdriver lol) I also don't know anyone with a vehicle yet so its hard to just drive my car to a shop cause I dont want it to overheat... What do you guys/girls think it is? thermo? waterpump? Thanks again for any and all help!

Also, Coolant is just a tad low but I dont think its low enough to cause this dramatic of a temp change.

Last edited by Dmaleck; Nov 6, 2010 at 07:37 PM.
Reply
Old Nov 6, 2010 | 07:47 PM
  #2  
bigj2717's Avatar
TECH Addict
iTrader: (15)
 
Joined: Sep 2005
Posts: 2,062
Likes: 0
From: San Antonio, TX
Default

Have you had the coolant system disconnected before this started happening? If not it sounds like the thermostat to me. If you have disconnected it did you open both bleed screw when you bled the system?
Reply
Old Nov 6, 2010 | 07:51 PM
  #3  
Dmaleck's Avatar
Thread Starter
Launching!
iTrader: (6)
 
Joined: Aug 2008
Posts: 220
Likes: 0
From: Spangdahlem AB,Germany
Default

Nope, Has never been disconnected before.
Reply
Old Nov 6, 2010 | 07:54 PM
  #4  
bigj2717's Avatar
TECH Addict
iTrader: (15)
 
Joined: Sep 2005
Posts: 2,062
Likes: 0
From: San Antonio, TX
Default

That really sounds like the thermostat to me then
Reply
Old Nov 6, 2010 | 07:54 PM
  #5  
LT1's Avatar
LT1
TECH Fanatic
20 Year Member
Photogenic
iTrader: (1)
 
Joined: Sep 2003
Posts: 1,624
Likes: 4
From: NorCal
Default

I also think it might be thermostat, the symptom your describing sounds like it.

Check the radiator cap might be a good time to do that at the same time.
Reply
Old Nov 6, 2010 | 07:57 PM
  #6  
Dmaleck's Avatar
Thread Starter
Launching!
iTrader: (6)
 
Joined: Aug 2008
Posts: 220
Likes: 0
From: Spangdahlem AB,Germany
Default

What can I check on the radiator cap to see if it building pressure?
Reply
Old Nov 6, 2010 | 08:08 PM
  #7  
LT1's Avatar
LT1
TECH Fanatic
20 Year Member
Photogenic
iTrader: (1)
 
Joined: Sep 2003
Posts: 1,624
Likes: 4
From: NorCal
Default

If you take the cap to autozone or some place they can check if it holds pressure.
Reply
Old Nov 6, 2010 | 08:17 PM
  #8  
gorge's Avatar
On The Tree
 
Joined: Sep 2010
Posts: 121
Likes: 0
From: Tucson, AZ
Default

just get a new cap, its like 18 bucks anyway, to change the thermo you only need a flat head screwdriver and a 5/16 or 8mm wrench or socket, hope you don't break it, Im planning on going to the track up there it would be kind of cool to have a couple of LTx at the track at the same time
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Nov 6, 2010 | 08:50 PM
  #9  
Dmaleck's Avatar
Thread Starter
Launching!
iTrader: (6)
 
Joined: Aug 2008
Posts: 220
Likes: 0
From: Spangdahlem AB,Germany
Default

Thanks for the help guys! I'm going to start with cap then thermo and so on, Kind of what I was going to originally do but good to know for sure. Thanks
Reply




All times are GMT -5. The time now is 04:38 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE