Windows fogging up
Elder User
Joined: May 2003
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From: Broken Arrow, OK.
OK, I'm not trying to start a foreign car bashing party but has anyone noticed that foreign cars and trucks windows fog up worse than domestic cars? I know that they are smaller inside but do you think it might have something to do with the glass they use?
Senior User
Joined: Oct 2004
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Sounds like a heater core on it's last leg. Keeping the defroster running and the temp just right while plowing snow, should keep the windows clear unless the heater core is bad. Accumulation of leaves and junk near or in the cowl vents can cause it, but usually they do not. Isn't it great, when you have others riding in the car or truck, the windows start fogging up, so you turn your defrosters on to clear them and then they complain about it being to warm, etc?
Be nice to yourself and do not use any anti-fogging sprays or rub on liquids on the inside of your windows. That junk doesn't last forever, you always have to re-apply it every so often and have to apply it evenly for it to ever have a chance of working. Inside of windows get dirty even if you are a non-smoker and when you go to clean them with glass cleaner (Windex, etc) it screws the anti-fogging application up.
Be nice to yourself and do not use any anti-fogging sprays or rub on liquids on the inside of your windows. That junk doesn't last forever, you always have to re-apply it every so often and have to apply it evenly for it to ever have a chance of working. Inside of windows get dirty even if you are a non-smoker and when you go to clean them with glass cleaner (Windex, etc) it screws the anti-fogging application up.
Senior User
Joined: Nov 2003
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Originally Posted by bdjupiter
OK, I'm not trying to start a foreign car bashing party but has anyone noticed that foreign cars and trucks windows fog up worse than domestic cars? I know that they are smaller inside but do you think it might have something to do with the glass they use?
They all seem to fog up the same to me, except my mothers car which would fog up in the middle of summer in Death Valley. She has a 1996 Sable.
Elder User
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From: Broken Arrow, OK.
I was just wondering, because I know that my buddies old RX-7 would fog up in nothing flat, Old Nissan truck would do the same. My Beretta wouldn't at all and my F-250 doesn't as long as the windows are clean.
Senior User
Joined: Dec 2001
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From: Michigan
years ago cars and trucks would hav a switch for inside and outside air. If the heater was run for a long time with the switch set to inside air your windows would steam up.
I remember stopping at a stop and rob (7/11) and there were two girls wiping water off the inside with a squegee, had them switch to outside air and when i came out there windows were clearing up. I think thats why cars and trucks now have the air conditioner go on when you switch to defrost.
This isn't 7677mess,s problem, it's the old leaky heater core.
I remember stopping at a stop and rob (7/11) and there were two girls wiping water off the inside with a squegee, had them switch to outside air and when i came out there windows were clearing up. I think thats why cars and trucks now have the air conditioner go on when you switch to defrost.
This isn't 7677mess,s problem, it's the old leaky heater core.
Elder User
Joined: Dec 2002
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From: TAOS NM
sounds like you have a leaking heater core. it happend to me for sometime then it just started leaking into the car on the passangers side. electrolysis is the main cause for heater core and radiator punchers.. does it fog up in a line or lines going up the windsheild instead of the intire windshield fogging up. if yes it's the heater core, sometimes it will leave a sort of hair grease looking stain from the sugar in the anti-freeze.try to pull the carpet from the toe board on the passangers side and after using heater you should see or smell anti-freeze vapor.
Lead Driver
Joined: Apr 2002
Posts: 7,746
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From: Tampa Bay, FL USA
Originally Posted by bdjupiter
OK, I'm not trying to start a foreign car bashing party but has anyone noticed that foreign cars and trucks windows fog up worse than domestic cars? I know that they are smaller inside but do you think it might have something to do with the glass they use?
Senior User
Joined: Apr 2004
Posts: 143
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i can smell coolant when I have the heat on and once in a while ill see a few drops on the p/s floor
Neat info to pass on: You can buy antifreeze based on propylene glycol which is practically non-toxic. Costs about the same as regular, performs about the same. I don't know why anyone would'nt use it.
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Elder User
Joined: Dec 2002
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From: TAOS NM
it' s gotta be the heater core. the other solution can be draining the intire cooling system ,including the block drain plugs, repair /replace the damaged core.then find the additive that STOPS electrolysis, it's a red liquid ,i will find the name for you.
don't even bother with the vents and all the other stuff, start pulling the heater core dood, i swear !
i changed heater cores twice in one year only because when i put on the first new one i did'nt drain the electrically charged coolant , heater worked fine then one day i could'nt even see outa the windheild and had enough water in the car to keep fish.depending on what car you have ,heater core removal is something else. for me it was the 69 torino which needs the entire dash ,steering colum to be removed... good opotunity to vacuum that centuries worth of dust and prehistoric candy.
TRUST ME SON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
don't even bother with the vents and all the other stuff, start pulling the heater core dood, i swear !
i changed heater cores twice in one year only because when i put on the first new one i did'nt drain the electrically charged coolant , heater worked fine then one day i could'nt even see outa the windheild and had enough water in the car to keep fish.depending on what car you have ,heater core removal is something else. for me it was the 69 torino which needs the entire dash ,steering colum to be removed... good opotunity to vacuum that centuries worth of dust and prehistoric candy.
TRUST ME SON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Senior User
Joined: Apr 2004
Posts: 143
Likes: 1
Electrolysis of the new heater core - can you tell me more?
I recently changed the heater core in my 79 f250 for the same reasons as this thread. Yes, I read the warning about changing the antifreeze. But I had just change the antifreeze about 500 miles ago, so I figured I could get away with it. Now I'm crossing my fingers....
I recently changed the heater core in my 79 f250 for the same reasons as this thread. Yes, I read the warning about changing the antifreeze. But I had just change the antifreeze about 500 miles ago, so I figured I could get away with it. Now I'm crossing my fingers....
Elder User
Joined: Dec 2002
Posts: 608
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From: TAOS NM
i was gonna copy this out and print it but it's a pain so try this
http://www.alldata.com/techtips/2003/20030203d.html
completely draining the cooling system INCLUDING the block drain plugs Tthen adding a ground wire from the battery neg to the heater core and i would add another battery neg connection directly to the radiator and that will solve the problem for good!
http://www.alldata.com/techtips/2003/20030203d.html
completely draining the cooling system INCLUDING the block drain plugs Tthen adding a ground wire from the battery neg to the heater core and i would add another battery neg connection directly to the radiator and that will solve the problem for good!
Last edited by forddytube; Feb 3, 2005 at 05:48 PM.
Senior User
Joined: Apr 2003
Posts: 336
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From: Dumas, Texas
Hey, sorry I couldn't resist, but I remember when my windows used to fog up on the inside but it heren't no heater core leak 
it was passion man.........Hey I aint THAT old that I can't remember the good times. 
it was passion man.........Hey I aint THAT old that I can't remember the good times.
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