coolant smell when ac or heater turned on
Thread Starter
Member
Joined: Nov 2004
Posts: 316
Likes: 0
From: North Jersey
Car: 1990 Pontiac Firebird
Engine: 3.1 V6 soon to be gone
Transmission: 700r4 Automatic soon to be a T56
coolant smell when ac or heater turned on
So for a while now when the car is on and I use the heat or ac I smell antifreeze. Its not great smelling as you can imagine and am wondering what the causes could be? Simple coolant leak some where? Car never gets low on coolant from what I can tell.
What do you think?
What do you think?
Supreme Member




Joined: Jan 2004
Posts: 2,322
Likes: 100
From: So. Ohio
Car: 88 Camaro
Engine: L98 350
Transmission: 700r4
Re: coolant smell when ac or heater turned on
Very slim possibility of a leak at the heater hoses out under the hood at the firewall, seeping back into the car, but I'd guess the heater core is starting to leak. Real common after all these years. Couple good how-to posts on here if you search. Not an easy job though.
Junior Member
Joined: Jan 2006
Posts: 63
Likes: 0
From: Northern New Jersey
Car: 1992 Camaro RS
Engine: L03
Transmission: 700-R4
Axle/Gears: 2.73
Re: coolant smell when ac or heater turned on
Yeah, check if you have a leak in your passenger seat. If you do, its a heater core.
Senior Member
iTrader: (1)
Joined: May 2007
Posts: 666
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From: Newport Beach, Ca.
Car: 1988 Iroc
Engine: 383 TPI
Transmission: 700r4
Axle/Gears: BW 9 bolt 3.27
Re: coolant smell when ac or heater turned on
Check the floor up to the firewall on passengers side, should be wet if heater core is leaking.
Thread Starter
Member
Joined: Nov 2004
Posts: 316
Likes: 0
From: North Jersey
Car: 1990 Pontiac Firebird
Engine: 3.1 V6 soon to be gone
Transmission: 700r4 Automatic soon to be a T56
Re: coolant smell when ac or heater turned on
should be wet only if the heater was running right? I havent used the heater in a while since its summer time
Senior Member
iTrader: (1)
Joined: May 2007
Posts: 666
Likes: 0
From: Newport Beach, Ca.
Car: 1988 Iroc
Engine: 383 TPI
Transmission: 700r4
Axle/Gears: BW 9 bolt 3.27
Re: coolant smell when ac or heater turned on
No it does not need to be on. Feel around the passengers side floor up to the firewall and you should find some wet areas.
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Senior Member
iTrader: (1)
Joined: May 2007
Posts: 666
Likes: 0
From: Newport Beach, Ca.
Car: 1988 Iroc
Engine: 383 TPI
Transmission: 700r4
Axle/Gears: BW 9 bolt 3.27
Re: coolant smell when ac or heater turned on
If you find that the carpet and pad are wet, pull up the carpet and treat the area so it does`nt start to rust. Por 15 makes some good products to treat rust if you need them.
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