Technical aspects of automobiles

92 Chevy Lumina – coolant leak and water vapor from AC vents

Hi, I have a 1992 Chevy Lumina, and starting about 3 weeks ago, I
noticed water vapor coming from the vent at the base of my windshield,
and then blowing out of my passenger side AC vents when I turned the AC
on.  I also noticed that I wasn’t dripping any water onto my driveway
when parked, even after having the AC on full blast for 20 minutes.

I was able to live with this, because I don’t have the time to go
poking around under my car.  But then, about a week and a half later, I
started leaking coolant.  And this isn’t a small leak, it’s almost a
steady drip that can form a puddle within 30 seconds.  So I started
carrying around bottles of coolant and water in my trunk just in case.
I noticed that the leak there wasn’t coming from the radiator, or so it
seemed, but further back, towards the back-middle of the engine.

I’m not very good with cars, although I learn fast and can read and
understand the mechanics of it, if I had some direction.  Someone
mentioned it could be a cracked/damaged heater core.  Does this sound
feasible?  If so, what’s the best steps to take in determining the
solution?  I’d like to figure out before I try fixing it and/or having
it fixed, so I don’t get ripped off.

.
posted by admin in Без рубрики and have Comments (7)

7 Responses to “92 Chevy Lumina – coolant leak and water vapor from AC vents”

  1. admin says:

    - Hide quoted text — Show quoted text -

    alex.vi…@gmail.com wrote:
    > Hi, I have a 1992 Chevy Lumina, and starting about 3 weeks ago, I
    > noticed water vapor coming from the vent at the base of my windshield,
    > and then blowing out of my passenger side AC vents when I turned the AC
    > on.  I also noticed that I wasn’t dripping any water onto my driveway
    > when parked, even after having the AC on full blast for 20 minutes.

    > I was able to live with this, because I don’t have the time to go
    > poking around under my car.  But then, about a week and a half later, I
    > started leaking coolant.  And this isn’t a small leak, it’s almost a
    > steady drip that can form a puddle within 30 seconds.  So I started
    > carrying around bottles of coolant and water in my trunk just in case.
    > I noticed that the leak there wasn’t coming from the radiator, or so it
    > seemed, but further back, towards the back-middle of the engine.

    > I’m not very good with cars, although I learn fast and can read and
    > understand the mechanics of it, if I had some direction.  Someone
    > mentioned it could be a cracked/damaged heater core.  Does this sound
    > feasible?  If so, what’s the best steps to take in determining the
    > solution?  I’d like to figure out before I try fixing it and/or having
    > it fixed, so I don’t get ripped off.

    It sounds like you need a heater core. Unfortunately, when your car was
    manufactured they started with the heater core and built the rest of the
    car around it (this is sarcasm.). You pretty much have to remove the
    entire dash to replace your heater core and as a beginner you may be in
    *WAY* over your head.

    If you want to try it yourself, make sure that the leak is indeed your
    heater core with a cooling system pressure tester. If it is, buy a
    manual and get crackin’!

    Make sure it isn’t just a corroded heater line. If you live in the rust
    belt the metal/rubber coolant lines to your heater core can and do rust out!

  2. admin says:

    <alex.vi…@gmail.com> wrote in message

    news:1149611545.661192.316360@h76g2000cwa.googlegroups.com…

    - Hide quoted text — Show quoted text -

    > Hi, I have a 1992 Chevy Lumina, and starting about 3 weeks ago, I
    > noticed water vapor coming from the vent at the base of my windshield,
    > and then blowing out of my passenger side AC vents when I turned the AC
    > on.  I also noticed that I wasn’t dripping any water onto my driveway
    > when parked, even after having the AC on full blast for 20 minutes.

    > I was able to live with this, because I don’t have the time to go
    > poking around under my car.  But then, about a week and a half later, I
    > started leaking coolant.  And this isn’t a small leak, it’s almost a
    > steady drip that can form a puddle within 30 seconds.  So I started
    > carrying around bottles of coolant and water in my trunk just in case.
    > I noticed that the leak there wasn’t coming from the radiator, or so it
    > seemed, but further back, towards the back-middle of the engine.

    > I’m not very good with cars, although I learn fast and can read and
    > understand the mechanics of it, if I had some direction.  Someone
    > mentioned it could be a cracked/damaged heater core.  Does this sound
    > feasible?  If so, what’s the best steps to take in determining the
    > solution?  I’d like to figure out before I try fixing it and/or having
    > it fixed, so I don’t get ripped off.

    Well, if it seems to be coming from the near center of the engine, then I
    would not suspect a heater core.  If it’s coming from under the hood (rather
    than under the dash), then you should be able to poke around a bit and find
    the source.  The vapor on the window would have originally have had me
    looking at the heater core, but the leak location does not sound consistent
    with that.

    -Mike-
    mmarlowREM…@alltel.net

  3. admin says:

    - Hide quoted text — Show quoted text -

    Mike Marlow wrote:
    > <alex.vi…@gmail.com> wrote in message
    > news:1149611545.661192.316360@h76g2000cwa.googlegroups.com…
    > > Hi, I have a 1992 Chevy Lumina, and starting about 3 weeks ago, I
    > > noticed water vapor coming from the vent at the base of my windshield,
    > > and then blowing out of my passenger side AC vents when I turned the AC
    > > on.  I also noticed that I wasn’t dripping any water onto my driveway
    > > when parked, even after having the AC on full blast for 20 minutes.

    > > I was able to live with this, because I don’t have the time to go
    > > poking around under my car.  But then, about a week and a half later, I
    > > started leaking coolant.  And this isn’t a small leak, it’s almost a
    > > steady drip that can form a puddle within 30 seconds.  So I started
    > > carrying around bottles of coolant and water in my trunk just in case.
    > > I noticed that the leak there wasn’t coming from the radiator, or so it
    > > seemed, but further back, towards the back-middle of the engine.

    > > I’m not very good with cars, although I learn fast and can read and
    > > understand the mechanics of it, if I had some direction.  Someone
    > > mentioned it could be a cracked/damaged heater core.  Does this sound
    > > feasible?  If so, what’s the best steps to take in determining the
    > > solution?  I’d like to figure out before I try fixing it and/or having
    > > it fixed, so I don’t get ripped off.

    > Well, if it seems to be coming from the near center of the engine, then I
    > would not suspect a heater core.  If it’s coming from under the hood (rather
    > than under the dash), then you should be able to poke around a bit and find
    > the source.  The vapor on the window would have originally have had me
    > looking at the heater core, but the leak location does not sound consistent
    > with that.

    > —

    > -Mike-
    > mmarlowREM…@alltel.net

    Someone suggested to me on another forum that bypassing the heater core
    by connecting the two heater hoses via a fitting would temporarily
    resolve the problem until I can get it repaired.  I think I might try
    that this evening.

  4. admin says:

    <alex.vi…@gmail.com> wrote in message
    > Someone suggested to me on another forum that bypassing the heater core
    > by connecting the two heater hoses via a fitting would temporarily
    > resolve the problem until I can get it repaired.  I think I might try
    > that this evening.

    That might be a good way to bandaid this problem.

    Some of you may remember the infamous Camaro heater hoses that
    connected to the core BEHIND the fenderwell.  You could (1) bypass
    the heater, as Alex is considering, (2) take off the finder or well liner
    and
    fix it, or (3) cut a door in the fenderwell, put on the new hose, and then
    weld or solder the door shut again.

    There is a special place in Hell for some GM engineers.

  5. admin says:

    So, I fixed my car.  I disconnected the two heater hoses from behind
    the firewall and connected them with another hose, bypassing the heater
    core.  Then I started it up, and noticed I was spraying coolant inside
    the engine, and then saw it was coming from a small leak on my water
    pump.  So I poured a bottle of Bar’s StopLeak in my radiator, and
    within 5 minutes, the leak was fixed.  This weekend, I’m gonna have to
    change my belt (due to all the coolant and water that’s been leaking on
    it) and the water pump, but that’s only 50 bucks max.

    Thanks, guys.

  6. admin says:

    On 8 Jun 2006 07:52:42 -0700, alex.vi…@gmail.com wrote:

    >So, I fixed my car.  I disconnected the two heater hoses from behind
    >the firewall and connected them with another hose, bypassing the heater
    >core.  Then I started it up, and noticed I was spraying coolant inside
    >the engine, and then saw it was coming from a small leak on my water
    >pump.  So I poured a bottle of Bar’s StopLeak in my radiator, and
    >within 5 minutes, the leak was fixed.  This weekend, I’m gonna have to
    >change my belt (due to all the coolant and water that’s been leaking on
    >it) and the water pump, but that’s only 50 bucks max.

    >Thanks, guys.

    Watch the water pump.  It is likely the bearing seal.  You should
    replace the pump.

  7. admin says:

    <alex.vi…@gmail.com> wrote in message

    news:1149778362.585754.312490@f6g2000cwb.googlegroups.com…

    > So, I fixed my car.  I disconnected the two heater hoses from behind
    > the firewall and connected them with another hose, bypassing the heater
    > core.  Then I started it up, and noticed I was spraying coolant inside
    > the engine, and then saw it was coming from a small leak on my water
    > pump.  So I poured a bottle of Bar’s StopLeak in my radiator, and
    > within 5 minutes, the leak was fixed.  This weekend, I’m gonna have to
    > change my belt (due to all the coolant and water that’s been leaking on
    > it) and the water pump, but that’s only 50 bucks max.

    > Thanks, guys.

    Good idea to replace the water pump.  Flush the system when you’re done as
    well.  I’m no believer in Bar’s or most of the other stop leak remedies.
    They can plug up a lot more than the leak in question.  Make sure the heater
    is back in the loop when you flush it too.  Start with a nice clean system
    and go from there.

    Don’t be surprised if you still have a problem though.   I can’t see a leak
    in the water pump resulting in moisture ladden air blowing out of the vents.

    -Mike-
    mmarlowREM…@alltel.net

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