General Maintenance & Repairs Leaks | Squeaks | Clunks | Rattles | Grinds
Sponsored by:
Sponsored by: CARiD

Overheating Help (I'm stumped)

Thread Tools
 
Search this Thread
 
Old May 9, 2008 | 07:25 PM
  #21  
TransAmdriv3r's Avatar
Launching!
iTrader: (10)
 
Joined: Sep 2007
Posts: 273
Likes: 0
From: wapwallopen, pa
Default

Originally Posted by SpaZMaN
Yes he stated that in the 1st post.

I'm more leaning to a bad head gasket, then a bad pump or radiator..good luck!
yes your right, I must have over looked it you should pull the spark plugs and see if any of them are clean from the coolant if in fact you do have a head gasket problem
Reply
Old May 9, 2008 | 09:19 PM
  #22  
01formula6's Avatar
Thread Starter
TECH Enthusiast
iTrader: (7)
 
Joined: Mar 2004
Posts: 510
Likes: 1
From: Schaumburg, IL
Default

Alright guys since I have 85K miles on the car I decided to just throw on a new water pump, flush the radiator and call it preventitive maintenance if it didn't solve the problem. I just finished letting the car warm up and then drove around for 40 min and the temp gauge never spiked into the red, coolant didn't bubble out of the overflow, but when I popped the hood and put my hand on the radiator cap it felt like the coolant was bubbling inside.

Thanks for everyone's suggestions, it's starting to look like a head gasket. I'm going to pick up a leakdown kit tomorrow. I haven't really been running the car hard lately beyond the occasional wot run, and don't see some of the other symptoms, but do seem to have more smoke than usual coming out of the exhaust (not a ton though), car has also seemed slightly sluggish off idle. Could this also be causing me to burn an excessive amount of oil (1 quart per 1000 miles)?
Reply
Old May 9, 2008 | 10:06 PM
  #23  
needadvice's Avatar
TECH Enthusiast
 
Joined: Jan 2008
Posts: 625
Likes: 0
Default

Originally Posted by 01formula6
Alright guys since I have 85K miles on the car I decided to just throw on a new water pump, flush the radiator and call it preventitive maintenance if it didn't solve the problem. I just finished letting the car warm up and then drove around for 40 min and the temp gauge never spiked into the red, coolant didn't bubble out of the overflow, but when I popped the hood and put my hand on the radiator cap it felt like the coolant was bubbling inside.

Thanks for everyone's suggestions, it's starting to look like a head gasket. I'm going to pick up a leakdown kit tomorrow. I haven't really been running the car hard lately beyond the occasional wot run, and don't see some of the other symptoms, but do seem to have more smoke than usual coming out of the exhaust (not a ton though), car has also seemed slightly sluggish off idle. Could this also be causing me to burn an excessive amount of oil (1 quart per 1000 miles)?
Do what TransAmdriv3r said: Take all the plugs out and see if any of them
are whitish and clean, as compared to the other ones. That will be the cylinder where the gasket leak is. Either way, as I said before, there is only ONE way to get air into the system, bad head gaskets. And if coolant boils, air is getting in. Coolant is around 20psi when at operating temp, the only thing can can beat that is cylinder pressure pushing air into the coolant. Any other type of coolant system leak would have coolant squirting out of that leak onto the ground making a puddle somewhere or gettinmg into the crank case.

Let us know what the leakdown tells you.

Removing the heads isn't that bad either, did mine in the driveway with a friend in about 2-3 hours getting them off, then about 2-3 hours putting everything back together. Get the heads resurfaced for sure before putting them back on.
Reply
Old May 9, 2008 | 10:22 PM
  #24  
01formula6's Avatar
Thread Starter
TECH Enthusiast
iTrader: (7)
 
Joined: Mar 2004
Posts: 510
Likes: 1
From: Schaumburg, IL
Default

I'm going to pull the plugs tomorrow morning and if they look normal then I'll do a leakdown test. It's definitely starting to look like a blown head gasket, not really what I had planned for this weekend. If I'm going to be pulling the heads it's going to be very hard for me to put the stock ones back on..or maybe I could just do a cam instead I'll keep you guys updated.
Reply
Old May 9, 2008 | 11:10 PM
  #25  
needadvice's Avatar
TECH Enthusiast
 
Joined: Jan 2008
Posts: 625
Likes: 0
Default

Originally Posted by 01formula6
I'm going to pull the plugs tomorrow morning and if they look normal then I'll do a leakdown test. It's definitely starting to look like a blown head gasket, not really what I had planned for this weekend. If I'm going to be pulling the heads it's going to be very hard for me to put the stock ones back on..or maybe I could just do a cam instead I'll keep you guys updated.
also, after you let the coolant get to operating temp and the t-stat opens, with the radiator cap off...rev it at the TB and see if you see bubbles coming to the top. If you do its a guaranteed head gasket issue.

Also, when you first start the engine in the morning when its bone cold you should get a little coolant spray out of the tail pipes. Because when you shut the engine off the coolant system is around 20psi, while the engine cools some coolant should seep into the cylinder where the gasket is blown and fill a little into the cylinder. When you first start it cold it should spray out onto the ground. Right after it starts give a little rev to get it through.
Reply
Old May 10, 2008 | 09:22 AM
  #26  
01formula6's Avatar
Thread Starter
TECH Enthusiast
iTrader: (7)
 
Joined: Mar 2004
Posts: 510
Likes: 1
From: Schaumburg, IL
Default

Originally Posted by needadvice
also, after you let the coolant get to operating temp and the t-stat opens, with the radiator cap off...rev it at the TB and see if you see bubbles coming to the top. If you do its a guaranteed head gasket issue.

Also, when you first start the engine in the morning when its bone cold you should get a little coolant spray out of the tail pipes. Because when you shut the engine off the coolant system is around 20psi, while the engine cools some coolant should seep into the cylinder where the gasket is blown and fill a little into the cylinder. When you first start it cold it should spray out onto the ground. Right after it starts give a little rev to get it through.
I actually did this yesterday after I put the water pump on. I can't remember now if there were bubbles or not, but I'm leaning towards yes. Also I did notice that when I started it up I had more smoke than usual coming out of the tailpipes and they did drip some moisture onto the ground...sounds just like what you are describing. Ok I'm off to the garage now.
Reply
Old May 10, 2008 | 11:54 AM
  #27  
01formula6's Avatar
Thread Starter
TECH Enthusiast
iTrader: (7)
 
Joined: Mar 2004
Posts: 510
Likes: 1
From: Schaumburg, IL
Default

I pulled the plugs and most of them look black and light brownish color, almost like light clay. #7 was the worst looking at was the only one with oil on the threads and the tip looked like wet clay. Here are some pics of a couple of plugs. Let me know what you guys think. I'm guessing #7 is responsible for my excessive oil consumption.

The order of the plugs below from left to right are 1, 2, 7, 8
Attached Thumbnails Overheating Help (I'm stumped)-plug-1.jpg   Overheating Help (I'm stumped)-plug-2.jpg   Overheating Help (I'm stumped)-plug-7.jpg   Overheating Help (I'm stumped)-plug-8.jpg  
Reply
Old May 10, 2008 | 04:28 PM
  #28  
needadvice's Avatar
TECH Enthusiast
 
Joined: Jan 2008
Posts: 625
Likes: 0
Default

Originally Posted by 01formula6
I pulled the plugs and most of them look black and light brownish color, almost like light clay. #7 was the worst looking at was the only one with oil on the threads and the tip looked like wet clay. Here are some pics of a couple of plugs. Let me know what you guys think. I'm guessing #7 is responsible for my excessive oil consumption.

The order of the plugs below from left to right are 1, 2, 7, 8
#8 looks like the one that might have the gasket leak, its cleaner than the rest. Thats the sign you look for with a blown gasket. Lets see the other 4 on the drivers side. But they all look pretty good. If you have a cylinder thats got an oil burning issue, the plug for that cylinder will usually look utterly horrible when you take it out. Especially if its from a valve seal leaking down onto the hot plug after engine shutdown. It will get all caked up. If the oil burning is from a bad ring the plug will always still look pretty good as oil cannot travel upwards after shutdown to get on the plug.

The bubbles coming up in the radiator is a direct tell-tale sign of a blown head gasket.

Now the moisture coming out of the pipes is another good sign of blown gasket(s). But also remember, moisture can also form inside the pipes overnight depending on what kind of weather you have (like dew), so when you start it up that moisture blasts out the back too. If its enough you can smell the coolant if thats what it is.
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 May 10, 2008 | 08:03 PM
  #29  
01formula6's Avatar
Thread Starter
TECH Enthusiast
iTrader: (7)
 
Joined: Mar 2004
Posts: 510
Likes: 1
From: Schaumburg, IL
Default

Originally Posted by needadvice
#8 looks like the one that might have the gasket leak, its cleaner than the rest. Thats the sign you look for with a blown gasket. Lets see the other 4 on the drivers side. But they all look pretty good. If you have a cylinder thats got an oil burning issue, the plug for that cylinder will usually look utterly horrible when you take it out. Especially if its from a valve seal leaking down onto the hot plug after engine shutdown. It will get all caked up. If the oil burning is from a bad ring the plug will always still look pretty good as oil cannot travel upwards after shutdown to get on the plug.

The bubbles coming up in the radiator is a direct tell-tale sign of a blown head gasket.

Now the moisture coming out of the pipes is another good sign of blown gasket(s). But also remember, moisture can also form inside the pipes overnight depending on what kind of weather you have (like dew), so when you start it up that moisture blasts out the back too. If its enough you can smell the coolant if thats what it is.

I didn't take pics of all the plugs cause 1,3,5 look alike and 7 was worse and then 2,4,6 look alike and 8 was a little different. I wouldn't say any of them looked "clean", just browner than others.

Here is what I did/figured out today.

-Exhaust has no smell of coolant (even put my face down there)
-Coolant has no bubbles when the engine is running at operating temp with cap off
-Pressure tested new and old caps, new one is fine, old one held no pressure
-I'm an idiot since I used the old cap last night after putting in the new pump
-I'm guessing the above reason is why the coolant boiled with the new pump
-Did compression test on 3,5,7 since I couldn't get to the others, they were 180,180,172 respectively
-Put in new plugs and let it idle/drove around for 40 min

The temp gauge stayed at 210 the whole time like it normally does. When I got home I left the car running and didn't hear or feel any boiling coolant, nor did any come out of the overflow.

I'm still not 100% sure it's fixed and haven't ruled out a head gasket problem yet. At least I think the compression test ruled out a drivers side head gasket. Everything appears ok now, except the burning oil. I suppose my problem could have been a bad cap and a failing pump. After putting in the new pump last night I immediately noticed better throttle response and power, maybe a sign the old one was going??? I'll put some more miles on it tomorrow and post an update.
Reply
Old Jun 15, 2008 | 11:01 PM
  #30  
blubyu02's Avatar
Launching!
iTrader: (17)
 
Joined: Jan 2007
Posts: 279
Likes: 1
From: da stix
Default

how did it ever come out? what was the problem with it im curious to know being that i am having simlar problems............
Reply
Old Jul 16, 2008 | 09:13 PM
  #31  
qwikz28's Avatar
TECH Addict
iTrader: (12)
 
Joined: Nov 2004
Posts: 2,491
Likes: 2
From: Franklin Lakes, NJ
Default

bumping an old thread but i'm curious as to the outcome myself. i have the same problem down to the bubbling in the radiator
Reply
Old Jul 17, 2008 | 04:49 PM
  #32  
PERFECT Z28's Avatar
11 Second Club
15 Year Member
iTrader: (7)
 
Joined: Sep 2005
Posts: 1,930
Likes: 0
From: Eagle Pass, TX
Default

Bump out of curiosity...
Reply
Old Apr 27, 2009 | 04:55 PM
  #33  
01formula6's Avatar
Thread Starter
TECH Enthusiast
iTrader: (7)
 
Joined: Mar 2004
Posts: 510
Likes: 1
From: Schaumburg, IL
Default

I just stumbled across my old thread and realized I never updated it with the outcome. Turns out it was a combination of a bad radiator cap and water pump. I tested the cap and it was bad, but my problem still wasn't fixed with just a new cap. I then put on a new pump and the problem has been fixed since.

Just a note. I also tried using the old cap and new pump...which did not work. New cap AND new pump was the only combo that fixed the problem.
Reply
Old Apr 29, 2009 | 10:09 PM
  #34  
Pharm0r's Avatar
TECH Regular
iTrader: (17)
 
Joined: Oct 2006
Posts: 473
Likes: 0
From: va beach, va
Default

I would agree with this. When I first bought my car I was having boiling coolant problems. tested switched and changed everything to no avail. A couple months later, low and behold, my water pump siezed. Replaced that, lowered the fan temps a little and never had a problem sense.
Reply
Old Apr 30, 2009 | 06:50 AM
  #35  
qwikz28's Avatar
TECH Addict
iTrader: (12)
 
Joined: Nov 2004
Posts: 2,491
Likes: 2
From: Franklin Lakes, NJ
Default

I'll update also and say that I did a flush, got a new pump, and got a new cap. I was ready to do a thermostat and then i realized one of my fans was unplugged! That did it!
Reply
Old May 1, 2009 | 01:48 AM
  #36  
ben77's Avatar
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 300
Likes: 0
Default

Originally Posted by qwikz28
then i realized one of my fans was unplugged! That did it!
Thats classic
Reply




All times are GMT -5. The time now is 10:09 PM.

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