Antifreeze Smell - Toyota Nation Forum : Toyota Car and Truck Forums
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#1 Old 01-08-2009, 09:05 PM
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USA Antifreeze Smell

Hello everyone. I have a little problem. When I turn on my heater on my 4runner I get a slight smell of antifreeze, I thought maybe the heater core was leaking. I checked the floor board carpet to see if it was wet from a leaking heater core, but it was dry. Does anyone have any idea what coul be causing this antifreeze smell? Could the heater core be starting to go out? Or do I have bigger problems?

Thank You all In Advance!!


-Leo
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#2 Old 01-08-2009, 09:42 PM
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The leak may be small enough that it does not drip or its dripping on top of something.

You'll need to explore a little.
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#3 Old 01-09-2009, 04:29 PM
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I'll be watching this thread with interest because my 89 V6 pickup has been doing the same thing for at least three years. Also no visible signs of leak, just a smell, so I figure it must be a tiny leak. I'll be removing my dash in a couple weeks, so I may find something then.
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#4 Old 01-09-2009, 05:02 PM
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I once replaced the heater hoses and then started noticing that smell. Couldn't find anything anywhere. Finally had the wife rev the engine as I watched. The new hoses had tiny little streams of coolant emitting from them. I took them back and they guy told his boss they had some more of that defective hose returned. Seems there were pinholes every few inches the whole length of the hose. Now, I don't think that's your problem but the point is it could be a very small leak which may only show up under pressure. Mine was gone almost the second it dropped to idle and was vaporizing so there was no evidence of the leak and probably would have been quite some time before I noticed a drop in coolant level. You might try revving the engine but a pressure check might be better. Good luck!
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#5 Old 01-10-2009, 08:07 AM
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1. Make sure reservoir is not too full-----overflow will do that.

2. Head gasket on back side of covers ok??
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#6 Old 01-10-2009, 11:14 AM
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4runner no heat and antifreeze smell

have a 98 v6 with no heat. checked hoses which all warm up fine, so have ruled out blocked hoses or malfunctioning valve. rang toyota and was advised it may be thermostat or clogged
heater core- both expensive. any ideas?
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#7 Old 01-10-2009, 07:23 PM
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You should be able to change the t-stat for well under $20.
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#8 Old 01-12-2009, 01:59 PM
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Quote:
Originally Posted by sb5walker View Post
I'll be watching this thread with interest because my 89 V6 pickup has been doing the same thing for at least three years. Also no visible signs of leak, just a smell, so I figure it must be a tiny leak. I'll be removing my dash in a couple weeks, so I may find something then.
.

Do a pressure check on the cooling system and you should easily be able to locate the leak.

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#9 Old 01-19-2009, 04:03 AM
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Quote:
Originally Posted by Dave's View Post
You should be able to change the t-stat for well under $20.

And substantially less work and cheaper than a head gasket
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