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I started having coolant smoke coming in my two middle heater vents. It is inconsistent, I still have heat and my radiator is holding fluid. Don't want to do a flush in case it is the heater core.

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Whisps of sweet smelling smoke /steam is most likely a heater core issue. There is a product on the market called IRON TITE that will plug any leak in a heater core and will not compromise the cooling system by plugging.

Posted on Apr 12, 2015


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Posted on Jan 02, 2017

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SOURCE: antifreeze smell and smoke coming out of vents

You have a coolant leak most likely in the heater core. Try disconnecting your heater hoses and coupling them together, then running the engine to see if the leak goes away. If it does, I would have the heater core replaced.

Posted on Dec 28, 2008

  • 1118 Answers

SOURCE: Antifreeze smoke coming out heater vents

depending on how bad, and how long the orginal core leaked, it might just be residue in heater box, and if it got up into the vents, it will take awhile for it to dry out.

Posted on Jan 22, 2009

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SOURCE: heater core for 83 cadillac deville

if your 83 deville is a coupe like mine then you can access the heater core from under the hood, not the interior of the car. take a look at the blower motor and you'll see that the plastic cover that it is mounted on comes out. under that large plastic cover you'll find the heater core. it takes a while to get all the little screws out, but it's more monotonous than difficult. you'll have to disconnect the blower cables, the temp. sensor and harness, and a few little ground wires and you're there. once you get to the core it's really self explanatory. undo the hoses, replace the core, clean out the piles of pine needles that have accumulated over the years, then put it all back together. if you have the core in hand, then you can replace it in 2 hours if you take your time. hope this helped. let me know if you have any troubles.

Posted on Feb 04, 2009

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SOURCE: Have a 2003 ford f150 crew cab truck will start to

Problem is most likely the water pump.Have seen several of these doing this on the 5.4L. Impeller fins were damaged on the ones that I have seen.

Posted on Feb 20, 2009

  • 691 Answers

SOURCE: how to replace the heater core on a 2005 caravan

is a task to get to it and time comsuming, you have to tear into the dash behind the glove compartment to get to it. it can be your heater core or busted heater control valve. heater core will in the same location as evaporater.

Posted on Sep 25, 2009

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2004 subaru outback, heating system acting up

Thermostat Stuck on warm up & or you have
a possible head gasket failure & I would suspect
a loss of coolant.

If that is the case, you have a ruined exhaust converter &
O2 sensors as well & a $5,000 plus repair bill coming

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Not getting any heat

Check heater pipes are hot ( two coolant pipes that go through the bulk head) if they are the heater radiator vents are closed, vent control problems, check under the dash, could be cables or they could be electrically operated. If cables, could have come off? If electrically operated check power to solenoids (fuses?)

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My 2003 chrysler 300 m special is over heating. the water level says its got plenty of water. the temperature gauge will drop when i turn the heater on

Coolant in the resevoir doesn't tell you what is in the system,
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Do you have coolant flow thru the radiator,is the
thermostat stuck?

Are the fans coming on?

May 24, 2011 | 2003 Chrysler 300M

1 Answer

The fan is on and the heat is turned on just not getting hot

You should check a few things here.

Check the hoses going into the heater core from the back of teh engine (underneath the throttle body).

Check the Thermostat guage and make sure it is not faulty.

Replace the coolant in your car. (undo the plug at the bottom of the radiator and let the fluid drain out) Once drained close the plug and then fill it back up with approved coolant)

Run the car until hot (about 15 mins and then see if there is any hot air coming out)

Bad news will be if your heater core is busted. You shouldn;t wait too long to check this out as a busted heated core (clogged) will eventuallu force the seals open and you will get coolant leaking into your car.

If it is your heater core these are steps i followed to replace mine:

Disconnect the negative battery terminal.

Disconnect the top and bottom hoses from the heater core next to the firewall)

Pull off the steering wheel
Undo the steering wheel bolt.
Undo the 3 screws holding the steering wheel cover in place, unclick them and put to the side.
Undo the centre console
Undo the glove box - you'll need to manipulate the stops on the inside and let it fall to the floor before - undo the two bolts at the bottom.
Remove the Instrument panel, radio, radio frame.
Undo the single screw in the bottom of the casing surrounding the vents control, gently pop out the vent plate.
Undo the 4 screws holding the vents controls in place.
Remove the frames that are holding the vent controls in place (either side of the centre colsoles (or where they were)
Remove the two side vents (push down and pull back).
Remove the two bolts (either side) that are holding the dash up.
Remove the two bolts (bottom left corner, bottom right corner) that are holding the dash up.
Gently pull the dash up and forward to (making sure you don't pull any wires off there guides and place to the side).

Put the dash to the side (resting on the front seat)

The heater core should be sitting in the middle of the dash.

Remove the four bolts (two top, two bottom) and place to the side.

Pull the heater core back and move to the side to clear the holes in the firewall.

Manipulate the heater core to the side and move out through the gap in the dash and the cross bar (it is a tight squeeze but you can get it out)

Installation is the reverse of all the instructions.

when you have finished installing the heater core make sure you bleed the engine with coolant

Top up the radiator - keep the cap off, turn on the engine, turn on the heater on the heater to full, with the engine running keep topping up the radiator as the water runs through the new core...keep doing this until no more water goes through - this last step takes a while so be patient otherwise you will start to drive the car and will have an overheating engine very quickly...

Feb 07, 2010 | 2004 Mitsubishi Lancer

1 Answer

Heat/Cool gauge fluctuates inconsistently

You might check the coolant level after the engine cools,if it's low add 50/50 mixture of coolant and water. Keep an eye on the level to see if it happens again. You might have a small leak in the system. Good luck

Jan 18, 2010 | 1998 Volvo S90

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91 lx accord overheating issue

make sure your over flow/add coolant bottle is clean...check that the hose from bottle to radiator isnt clogged...also fill add bottle fluid level between add and full mark

Nov 15, 2009 | 1991 Honda Accord

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We first noticed a problem when our 98 expedition started overheating, we put in the coolant and went on our way. A few days later smoke started coming in the vents when the AC was on high. We checked the...

Your auto is definitely loosing coolant and will overheat. Check your thermostat, hoses, belts, radiator cap and water pump. If you do not fix the leak or coolant circulation problem you can destroy your engine. The smell inside can be being picked up from the outside vent or it could be your heater core inside the ventillation area leaking (which could be your coolant leak).. If that is the case you will need to replace the heater core.

Jul 10, 2009 | 1999 Ford Expedition

1 Answer

Why am I losing coolant and have no heat or air?

I would start by checking for coolant leaks. Common places would be in the waterpump or heater core. Heater cores can crack and leak. The heat from your vents inside the vehicle comes from air passing over the heater core, which is heated by the hot coolant flowing through the heater core. It acts in a similar fashion to your radiator, with the purpose of heat transfer. A coolant system that is low on coolant will not transfer heat through the heater core. Also, deposits from the coolant system can collect and plug the heater core which will restrict the flow and the amount of heat that is transfered to your heater. If you don't see coolant leaking externally, it may be leaking into the engine. this may be from a blown head gasket or warped head. If this is the case you may notice some whitish color smoke coming from the exhaust, as well as your coolant overflow/storage tank fluid level may increase.
The air conditioning is a seperate system and may be a seperate issue. The system contains liquid freon like a refrigerator. You can by recharge kits at your local autoparts store. If the kit works, you may find there is a leak in the system and you will loose cold air after some time. If thats the case, a certified dealer can fill the system with colored dye to help locate the leak. A bad compressor or evaporater can also cause a/c systems to fail.

Jun 10, 2009 | 2003 Ford Explorer

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Engine overheating and blowing fluid out of vents

fluid coming out of the vents indicates a faulty heater core, but this does not explain the overheating problem. The blown heater core may only be the result. Check the coolant level.Check for coolant leaks primarily at the water pump. Check the thermostat by insuring both hoses to and from the radiator warm up. Check for foamy oil or white smoke from the exhaust indicating a blown head gasket or cracked head. Check to ensure your cooling fan is working.

Jan 03, 2009 | 2003 Nissan Altima

2 Answers

Antifreeze smell and smoke coming out of vents

You have a coolant leak most likely in the heater core. Try disconnecting your heater hoses and coupling them together, then running the engine to see if the leak goes away. If it does, I would have the heater core replaced.

Dec 28, 2008 | 2001 Chevrolet Blazer

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