Question about 2002 Chevrolet Tahoe

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I keep having to refill my coolant tank what do i need to do

I know this its a slow leak and I know that I dont have a crack in the tank. I've ran the tahoe for 1 hour parked and no leak and drove through the neighborhood and highway 1 hours. turned it off in my drive way, checked it every 10 minutes see if anything leaked from it for 2 hours and nothing appeared to leak from it. ALSO I know it is a leak because i filled the tank to the marker and 3 days later the low coolant light came on. i checked to see if I cross threaded the cap and it wasn't. there was roughly about a quarter left of coolant in the tank. The brand of coolant i use in the Tahoe is: Peak 50/50 Antifreeze and Coolant. (Blue Bottle) if it helps any to know the brand i use. MY O2 TAHOE WAS IN FOR REPAIR OF A SEAL FOR THE MANIFOLD GASKET...NOW 2 WEEKS LATER I AM SMELLING COOLANT IN MY CAB...WHEN I DROVE IT INTO A DEALERSHIP THEY SAID THEY SAW RESIDUE NEAR THE WATER PUMP...I CANT HELP BUT THINK THIS IS RELATED TO THE REPAIR THAT WAS JUST DONE, WHAT CAN IT BE?

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  • merciergal72 May 28, 2009

    02 tahoe i need help my intake manifold gasket seal was replaced and now several weeks later i smell coolant in the cab i cant help but thinking its related and there is residue near the water pump but i had that changed recently what dould be wrong

  • merciergal72 May 28, 2009

    yes

  • merciergal72 May 28, 2009

    yes

  • merciergal72 May 28, 2009

    yest there is residue on the passenger side carpet

  • merciergal72 May 28, 2009

    ok...being that a wrench was found in my hood two weeks later and 4 different people worked on my car leads me to believe that this is related to workmanship..what specific hoses would be removed to fix the manifold which may have damaged the core neck

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There is a small hole under the extension behind where the pulley is mounted, most times barely visible. If you see any coolant there the pump seal is leaking. Many times it will show up better with the cap off, as internal pressure can sometimes push the seal against the shaft and temporarily stop the leak. If any coolant is found there,(sometimes it will run down the lower hose and appear like a bad hose or clamp) the pump needs to be changed. No, it is in no way related to a manifold gasket leak.

Posted on May 28, 2009

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  • Richard Scordino May 28, 2009

    OK if you changed the pump already and smell coolant in the cab but can't see any on the ground or elsewhere, it is possible that the heater core sustained damage during repair...they use plastic necks on some of those and they are not as durable as the old style metal ones...Is there any dampness or coolant residue on the passenger side rug?

  • Richard Scordino May 28, 2009

    Then, you have a heater core leak. Problem is if those hoses were moved or replaced during manifold R&R, the neck on the core may have broken...Only way to know that is to have it removed. It is possible that it may have just failed from time and miles of use...If leaking from the core itself that is likely the case. At present, your objective is to correct the problem, then if needed, argue the cause later!
    Good luck!!!


  • Richard Scordino May 28, 2009

    There are two hoses that attach between the engine and the firewall that carry antifreeze to the heater core and back to the engine. They are close to the back corner of the engine on the right side and usually one connects to the manifold. It is possible to lean on one while working or if it's removed it can be pushed out of the way.
    Leaving a wrench somewhere is not a sign of poor workmanship just leaving it behind. (in over thirty years I could fill a small toolbox with wrenches I've accidentally left behind Including a whole set of 1/4 inch sockets inside a chevy race engine that stayed there for a long time!)
    As I suggested, check the core after it has been removed and let it show you what happened...blaming anyone will not get you anywhere you want to go. Heater cores do fail by themselves...No one likes to see that but it can and does happen!
    You can make a better argument with facts than you can with maybes!!! And, you won't have to apologize if you are wrong!!!


  • Richard Scordino May 29, 2009

    Just posted reply to your other post...read it and believe it...did repairs and managed shops for over thirty years...This kind of thing can happen...could be accidental or it may have happened just because of age and wear (cores are aluminum and not as durable as the old brass ones)...have it fixed and ask to retain old parts, bring it to another shop and ask them what they think about what they see.
    There are many good shops...if you don't trust the one you use, go to a different one.


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Freeze plug leak!

Posted on Apr 23, 2010

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