Page 1 of 2 12 LastLast
Results 1 to 20 of 21

Coolant leak?

This is a discussion on Coolant leak? within the General Help forums, part of the LSx Technical Help Section category; Hey guys. I start my car in a cold morning about 1 week ago and the low coolant light came ...

  1. #1
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Coolant leak?

    Hey guys. I start my car in a cold morning about 1 week ago and the low coolant light came up. It was one of days that it was like 20 degrees here in FL. I turned the car off and then back on and the light was gone.

    Yesterday the light came back. I turn the car off and check the radiator and it was like 1/4 of a coolant jug short. I added the coolant and the light went away. I ran the car most of the day and checked a few times but i cant see an actual leak. It could be a very small leak but i can't see it. No coolant dripping on the floor either. I checked the coolant today and it drop a little but not much. The car is not overheating.

    Should I start by replacing my radiator cap? Any ideas on where to look? Thanks.
    Last edited by JayTA98; 01-08-2011 at 08:09 PM.

  2. #2
    Grand Imperial Wizard Sarge's Avatar
    Join Date
    Aug 2005
    Location
    Texas Department of Corrections
    Posts
    18,129
    Retired Outlaw Sum Bitch

    Pressure check the system.
    Check your dipstick (oil) and see if you have any milky looking crap on there....but have your system pressure checked.

  3. #3
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    What Sarge said. Also check your radiator, hoses and water pump for leaks. I had the same issue, but no coolant light. Slightly low overflow jug which eventually led to water pump failure.

  4. #4
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    I checked the oil dipstick and its fine. The overflow jug is at normal levels. I'm going to get pressure test this week when i get a chance. I will keep an eye for leaks. thanks guys.

  5. #5
    Moderator Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    6,998

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    pressure test as stated. Most common leak source is the water pump. Other than that check over all the rad and heater hose connections and the TB coolant hoses.

  6. #6
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    I will check those. If is the water pump, will replacing the gasket will do or should I replace the whole pump? Car has 108k. Thanks Cutlass.
    Last edited by JayTA98; 01-08-2011 at 08:36 PM.

  7. #7
    Junior Member
    Join Date
    Sep 2006
    Location
    Georgia
    Posts
    86

    red black
    98Z28

    When my 98 did this I chased the source of leak for months. Seemed like water was leaking from overflow tank. But not all the time. After realizing the cap was original equipment , I changed it. Was very weak spring and as system pressurized water was sent to overflow. After fixing the cap still had undetected leak. But only days after changing cap waterpump leak finally made itself known. Got the car at 85,000 and made it to 245,000 before needing pump , guess I'm lucky. That and a battery can't complain for 160,000 miles.

  8. #8
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by 89RS&98Z28 View Post
    When my 98 did this I chased the source of leak for months. Seemed like water was leaking from overflow tank. But not all the time. After realizing the cap was original equipment , I changed it. Was very weak spring and as system pressurized water was sent to overflow. After fixing the cap still had undetected leak. But only days after changing cap waterpump leak finally made itself known. Got the car at 85,000 and made it to 245,000 before needing pump , guess I'm lucky. That and a battery can't complain for 160,000 miles.
    Are you talking about the radiator cap? the overflow tank cap does not have a spring in it. I cleaned all the areas with degreaser and i'm still looking for the leak. nothing found yet. If it is the gaskets of the pump ill prolly change it too along with the waer hoses.

  9. #9
    Junior Member
    Join Date
    Sep 2006
    Location
    Georgia
    Posts
    86

    red black
    98Z28

    yes the rad cap

  10. #10
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Just put a new radiator cap from sutozone. kinda of cheap but just to try it out.

  11. #11
    Senior Member wileyCoyote's Avatar
    Join Date
    Oct 2005
    Location
    Centerville OH
    Posts
    1,591

    blue
    1999 TransAm

    Quote Originally Posted by JayTA98 View Post
    I will check those. If is the water pump, will replacing the gasket will do or should I replace the whole pump? Car has 108k. Thanks Cutlass.
    probably a good idea to replace w/ a brand new pump. i'm on my 3rd water pump. the original went bad (slight leak) around 90k, the second one went bad (leak - dripping on floor) around 140k...

  12. #12
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    This might sound stupid but how do i know when the water pump is bad? I know that it could leak from the gasket and that it is a good idea to replace because of all the work involved with replacing the gaskets but is there a way to tell if the pump is bad besides the car overheating? thanks.

  13. #13
    Moderator Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    6,998

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    loose bearings (ie play in the pulley), a leak from the pump itself (out of the weep hole), and noisey bearings. Those are the 3 most common pump failures.

  14. #14
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Quote Originally Posted by Cutlass View Post
    loose bearings (ie play in the pulley), a leak from the pump itself (out of the weep hole), and noisey bearings. Those are the 3 most common pump failures.
    ^^Oh, how I know those symptoms.

  15. #15
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    update: I had the car pressure tested with my mechanic. We didn't noticed any leaks. The presssure was holding. His radiator cap tester was bad so we couldnt test it. I put cheap new radiator cap and im keeping an eye on the fluid to confirm that the cap is the issue.

  16. #16
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Keep us updated.

  17. #17
    Junior Member ftcss's Avatar
    Join Date
    Dec 2009
    Location
    Gainesville, Fla
    Age
    51
    Posts
    13

    Silver
    1998 SS #1139

    I've got the light on all of the time now, but the coolant levels are fine. No leaking, but the light stays on. Anyone else every have this problem?

  18. #18
    Member mike171562's Avatar
    Join Date
    Feb 2010
    Location
    Houston, Tx
    Posts
    162

    Black
    1998 WS6 T/A

    its common for that sensor to go bad, you can take it out and clean it and sometimes that fixes it for a while, I just unplugged mine.

  19. #19
    Junior Member ftcss's Avatar
    Join Date
    Dec 2009
    Location
    Gainesville, Fla
    Age
    51
    Posts
    13

    Silver
    1998 SS #1139

    Quote Originally Posted by mike171562 View Post
    its common for that sensor to go bad, you can take it out and clean it and sometimes that fixes it for a while, I just unplugged mine.
    Where is the sensor located?

  20. #20
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    Quote Originally Posted by ftcss View Post
    Where is the sensor located?
    I think is on the passenger side of the back side area of the radiator facing the engine. I believe is a small square box close to the top of the radiator. In my case the level was dropping so its not the sensor.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: big coolant leak can't see from where?!
    By ls1fan74 in forum GTO
    Replies: 29
    Last Post: 03-25-2015, 02:54 PM
  2. Help: Coolant Leak
    By maher19403 in forum GTO
    Replies: 9
    Last Post: 10-22-2010, 02:09 PM
  3. Help: big coolant leak
    By Siciliano15 in forum External Engine
    Replies: 9
    Last Post: 05-03-2010, 02:31 PM
  4. Coolant Leak
    By Tx98Formula in forum General Help
    Replies: 4
    Last Post: 04-03-2010, 09:50 AM
  5. Help: Need pic of coolant pump weep hole (Coolant Leak)
    By Sweet Chops in forum General Help
    Replies: 13
    Last Post: 04-20-2009, 08:14 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •