Question about 1998 Dodge Ram 1500 4WD

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I smell anti-freeze and when i get in the truck the windshield fogs.

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  • Dodge Master
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Sticky film on inside of windshield and smell of antifreeze is a sign of heater core leak. Make sure hose connections at firewall are not the culprit before you take more drastic measures.

Posted on Mar 07, 2009

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What are symptoms of hearing core going bad?


LEAKING on passenger floor plugged up as in no heat.

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If your windshield is also fogging up you may have a leaking heater core. Feel and smell the wet area if it feels slippery and has a sweet smell its the heater core leaking anti-freeze.

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I've been getting an anti-freeze smell in the cabin. Today, the windshield began to fog slightly with a terrible anti-freeze odor. This afternoon, the engine was running much hotter than usual. I...


if you r getting smell in car and fog on windshield, with known history for common problem, you have a heater core leaking, You could try a stop leak from a parts supplier, but you need a heater core, and is a rather big job, as entire dash needs to be pulled back to axcess

try stop leak, if that doesn't fix, you didn't waste alot of time and money

good luck, and if you wanna tackle job, let me know i will send guided steps to help you along

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Heater immediately fogs all windows and there is a sweet odor in the cab of 2003 Buick Rendezvous, defroster works fine, but will not clear the windows after heat is put on


Sounds like a possible heater core failure(hole in it) the smell indicates to me the coolant(anti-freeze) is leaking into the passenger compartment.
Check the carpet in front of the front passenger seat for moisture, this would confirm heater core leak.
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The mildew smell you refer to could be anti-freeze. When a heater core starts leaking it may allow anti-freeze (which circulates through it for heat) to be blown through the ducts onto the windshield in defrost mode. The repair is to have the heater core replaced. It may wait for the thermostat to open and allow the coolant to circulate before you notice it. Occasionally the carpet on the passenger side may be wet from leakage.

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Probably not. Residue on the passengers side rug is likely either from a leaky heater core or a blocked air conditioner evaporator drain. Is the residue slippery feeling? Does it have a sweet anti-freeze smell? If you blot it up with a white towel, does it have a color?

If it is colored the same color as your anti-freeze (green, orange or pink, depending on what type your tahoe uses) and has a sweet smell, my bet is the heater core is leaking. This would also cause fogging on the windshield when using the front defroster and a sweet smell from the air vents when the heat is turned on.

If it just seems like water and seems to get worse when you use your air conditioning, it is likely a blocked AC evaporator drain.

In any case, neither of these problems are likely to be related to an intake manifold job.

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not a home mechanic job trust me ,garage this one .you could try another radiator sealer though might help or some mustard powder about 2 tablespoons

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The early sign of a heater core leak is the smell of coolant, the reason is that only vapor is leaking now, it will gradually get worse in most cases and coolant will start comming out the heater box condensation drain.

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doesn't sound like the thermostat, but the heater core, USUALLY located up (WAY UP) under the dash board, on the passenger side of the car. Do you ever smell anti-freeze, or have trouble with the windshield fogging/misting up on the inside of the car??

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