GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 9 of 9

Thread: head gasket?

  1. #1

    Default head gasket?

    hey i was just wondering if someone would be able to tell me if my headgasket is gone or not , this is what happened the other night i was driving home an all of a sudden my 97 1500 lost all heat an the heat gauge went to the max an then back down to half, where it useullay stays an the quarter mark, then today when i started it was down about half gallon of antifreeze so i filled the rad back up an i got heat again , so if any one couldlet me know anything about this problem it would be greatly appericated thank you.

  2. #2
    Master Mechanic TritonBoulder47's Avatar
    Join Date
    Nov 2009
    Tunkhannock, PA (North East)


    There's defineltely a leak somewhere... Check all your hoses and such...

    Tim a.k.a. Da' Boulder

    2003 Chevrolet Avalanche Z71 - Custom Emergency Response POV

    Firefighter, Fire Policeman, Ambulance Driver, Rescue Tech, Emergency Lighting Installer

    Tint, 20's, Bull Bar, Intake, Exhaust, Billet Grill, Stereo, Custom Console, Emergency Equipment, and the list goes on...

  3. #3


    ok, i was thiknig that it might of been there thermostate but i had one of my buddies to look at it an there looked to be 2 quarts of oil over the full mark then we went for a drive an it didint heat or nothing an checked the oil when we came back an it dropped to a little over full

  4. #4


    Check that oil for beads of water or coolant.
    I would suspect you've got a bad headgasket.

  5. #5
    Jr. Engineer
    97chevz71's Avatar
    Join Date
    May 2009
    Perry County, Pennsylavania


    IF you look on top of the intake where the anitfreeze hose goes into. where it is connected they are very prowne to leaking there.

  6. #6


    It deff sounds like a head gasket leak and its going into the oil. The s- series r know for this I've had 2. My advice is not to drive it and change the oil u'll prbly c all ur lost antifreeze, if so i'd say replace the intake gasket as said the s series chew thru them and this sounds just like that. btw u may want to tear the motor apart or at least the top of it to check for damage too many goods motrs have been destroyed b/c of this

  7. #7

    Join Date
    Feb 2008
    Red Wing, Minnesota, United States


    Your more likely that you have lost the intake gasket, the vortec 350 is known for that, especially if you know it hasnt been changed and the truck has over 100,000mi. For sure check your oil though, and dont drive the truck anymore, water is not a lubricant. You have to rip everything apart anyway, so it would be just a wise investment to change ALL the gaskets at once to save on a future failure when you could get them all taken care for at once.
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual

  8. #8


    Fisrt if you have water in your oil it turns to chocolate milk no mistaking that and VNCj is right suspecting intake they are more prone to failure then head gaskets

    99 tahoe 2 dr. 4x4 7.4 4L80-e NP246, SAS, dana 60 hp, sterling 10.5 rear, gibson headers, and alot of tricks of the trade !!!!!!IF YOU'RE NOT CHEATING YOUR NOT TRYING!!!!!!!!

  9. #9
    Master Mechanic bigdaddy77084's Avatar
    Join Date
    Jan 2010
    Houston, Texas, United States


    I had a 96 2500 with 75k on it and the intake started to leak, it took a week to find it, after changing the water pump. Oh that sweet smell..

Similar Threads

  1. Recent Head Gasket Replace. Won't Start Just Turns.
    By derbs1129 in forum GM Powertrain
    Replies: 2
    Last Post: 07-24-2010, 11:00 AM
  2. Head gasket and other problems???
    By jayfire in forum GM Powertrain
    Replies: 1
    Last Post: 12-31-2009, 10:00 PM
  3. Head Gasket Replacement
    By rrsand in forum GM Powertrain
    Replies: 5
    Last Post: 08-24-2009, 06:29 PM
  4. '95/'96 454 ??s - Oil pressure & head gasket
    By omnisi in forum GM Powertrain
    Replies: 1
    Last Post: 03-15-2009, 11:27 AM
  5. 5.3 head gasket ??
    By FireRed in forum General Chevy & GM Tech Questions
    Replies: 0
    Last Post: 07-06-2008, 12:05 PM

Tags for this Thread

Posting Permissions

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