Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

When A/C is on i smell coolant?

Thread Tools
 
Search this Thread
 
Old Jul 27, 2007 | 01:58 PM
  #1  
The PAT WS6's Avatar
Thread Starter
Banned
iTrader: (14)
 
Joined: Apr 2005
Posts: 1,701
Likes: 0
From: Keller
Default When A/C is on i smell coolant?

why is it whenever my Air conditoner is on i smell coolant blowing throught the vents.... bad. i need this fixed. wat could it be ? i noticed it happened like 2 weeks after i did my cam swap....

any help here guys?
Reply
Old Jul 27, 2007 | 02:02 PM
  #2  
Redlinez's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jan 2003
Posts: 2,298
Likes: 0
From: Fuquay-Varina, NC
Default

Heater core is leaking. Classic sign.
Reply
Old Jul 27, 2007 | 02:12 PM
  #3  
Michael02hawk's Avatar
TECH Fanatic
iTrader: (26)
 
Joined: Feb 2005
Posts: 1,155
Likes: 1
From: Rochester, NY
Default

Could also be a leaking water pump. I had the same smell, for weeks I didnt realize it was only when the A/C was on. Turned out to be my stock pump - it was a good excuse for me to buy the EWP!
Reply
Old Jul 27, 2007 | 02:20 PM
  #4  
blueeyeddevil141's Avatar
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

Heater core.
Reply
Old Jul 27, 2007 | 02:22 PM
  #5  
The PAT WS6's Avatar
Thread Starter
Banned
iTrader: (14)
 
Joined: Apr 2005
Posts: 1,701
Likes: 0
From: Keller
Default

well my car does not leak coolant, it just smells. where is my heater core and how much is it? any write ups or anything guys?

thanks again
Reply
Old Jul 27, 2007 | 02:23 PM
  #6  
brad8266's Avatar
TECH Senior Member
iTrader: (23)
 
Joined: Aug 2005
Posts: 8,797
Likes: 0
From: Watertown, NY
Default

dash needs to come apart on the pass side.
Reply
Old Jul 27, 2007 | 02:30 PM
  #7  
N01SS's Avatar
12 Second Club
iTrader: (24)
 
Joined: Jul 2005
Posts: 127
Likes: 0
From: san jose, ca
Default

Check behind your radio/hvac controls on the hump, and passeger side carpet...its probably wet, one more for the heater core.
Reply
Old Jul 27, 2007 | 02:51 PM
  #8  
DaddySS's Avatar
TECH Addict
 
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Default

If you turn the heater on do you smell coolant - the same, worse, better?
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 Jul 27, 2007 | 03:15 PM
  #9  
The PAT WS6's Avatar
Thread Starter
Banned
iTrader: (14)
 
Joined: Apr 2005
Posts: 1,701
Likes: 0
From: Keller
Default

Originally Posted by DaddySS
If you turn the heater on do you smell coolant - the same, worse, better?
dont knw i will try it... but why am i gettin the coolant smell?!?!?!?
Reply
Old Jul 27, 2007 | 03:30 PM
  #10  
joecar's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Default

Be sure you're smelling coolant... Dexcool smells different than green coolant.

Heater core has been known develop leaks where the pipes are crimped into it... leaks into the hot air passage in the HVAC system, and onto your carpet; and it will fog up your windows.

To access the heater core, you need to remove the glove box (and the underdash panel); heater core hoses are accessed from the engine compartment.
Reply
Old Jul 27, 2007 | 04:01 PM
  #11  
ROCNDAV's Avatar
TECH Junkie
iTrader: (100)
 
Joined: Mar 2004
Posts: 3,725
Likes: 2
From: Pasadena, CA
Default

+1 more for heater core. Had the smell then ,a few weeks later, the puddle on the passenger side foot area. Let me know what you end up paying for your heater core, I still have to replace mine. I was checking a few out on ebay. I think I want to pay the money for a new one, no sense putting a used one in, only to have it fail again.
Reply
Old Jul 27, 2007 | 04:04 PM
  #12  
Trev_SS's Avatar
iTrader: (17)
 
Joined: Jul 2004
Posts: 1,784
Likes: 0
Default

how much are they new? and im still not sure how this is realted to coolant/ dexcool?
Reply
Old Jul 27, 2007 | 04:30 PM
  #13  
pewter01z's Avatar
On The Tree
iTrader: (44)
 
Joined: May 2004
Posts: 121
Likes: 0
From: Tuscaloosa AL
Default

OK. The heater core is located inside your car. In the duct work. The same ductwork that your a/c blows thru. The heater core has hot engine coolant running thru it. If it leaks the coolant pools up inside the duct. Hence "I smell coolant blowing thru the vents". Hope this explains it.
Reply




All times are GMT -5. The time now is 06:20 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