Automotive

Stop leak for heater core issue ..should I use it or replace....??

  • Last Updated:
  • Dec 4th, 2012 10:08 pm
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[OP]
Newbie
Jan 24, 2009
80 posts
1 upvote
Ottawa

Stop leak for heater core issue ..should I use it or replace....??

Got some misting on the windows but not at every start up,only when it came is raining. There seems to be faint smell of coolant, carpet is not moist. Car is a 1998 escort in good condition so I wonder if I need to spend some $$to get the heater core replaced or just drop in some stop leak and get through the winter.
Would like some comments on the pros and cons of using this product....
Car still has good heat in the passenger cabin and the temperature guage in in the middle as usual.
I got some quotes of around $300-350 for repairs.
Thanks in advance.
16 replies
Sr. Member
Dec 1, 2012
902 posts
334 upvotes
Beaverton
Carquest has a good liquid stop leak product that seems to work most times.
Deal Addict
User avatar
Dec 20, 2005
2833 posts
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duffer wrote:
Dec 4th, 2012 5:26 pm
Got some misting on the windows but not at every start up,only when it came is raining. There seems to be faint smell of coolant, carpet is not moist. Car is a 1998 escort in good condition so I wonder if I need to spend some $$to get the heater core replaced or just drop in some stop leak and get through the winter.
Would like some comments on the pros and cons of using this product....
Car still has good heat in the passenger cabin and the temperature guage in in the middle as usual.
I got some quotes of around $300-350 for repairs.
Thanks in advance.
Do not use that crap in a can!!!

Check the passenger carpet, feel under it with your hand and look under. If you see no leaks or moist/wet spots then just keep driving.
Also check your coolant level to make sure you're not low and have a leak somewhere that is still unspotted. Your smell could be coming for the engine bay and not the heatercore and creeping threw the cowl vents.
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Banned
Sep 22, 2008
8322 posts
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use pepper and dump in a raw egg in there, should plug it up for the winter :)
Sr. Member
Dec 1, 2012
902 posts
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Beaverton
001Stunna wrote:
Dec 4th, 2012 5:40 pm
Do not use that crap in a can!!!

Check the passenger carpet, feel under it with your hand and look under. If you see no leaks or moist/wet spots then just keep driving.
Also check your coolant level to make sure you're not low and have a leak somewhere that is still unspotted. Your smell could be coming for the engine bay and not the heatercore and creeping threw the cowl vents.
Your diagnosis is correct, but I don't think a 15 year old Ford Escort is going to mind....
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Dec 20, 2005
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love2save wrote:
Dec 4th, 2012 5:50 pm
Your diagnosis is correct, but I don't think a 15 year old Ford Escort is going to mind....
I just figure before spending $$$ on a liquid with pellets in a can product might as well try to look for a leak in the engine bay. Especially as the liquid in a can is never a permanent fix.
Lower rad hose, upper rad hose, heater core inlet/outlet hoses, thermostat inlet/outlet joints, throttle body coolant hoses etc. All of these could leak and cause the smell to enter the passenger compartment.
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[OP]
Newbie
Jan 24, 2009
80 posts
1 upvote
Ottawa
Thank for all the input. Will open the engine hood and sniff around. Yeah just want to get through the winter
[OP]
Newbie
Jan 24, 2009
80 posts
1 upvote
Ottawa
001Stunna wrote:
Dec 4th, 2012 5:53 pm
I just figure before spending $$$ on a liquid with pellets in a can product might aswhat B well try to look for a leak in the engine bay. Especially as the liquid in a can is never a permanent fix.
Lower rad hose, upper rad hose, heater core inlet/outlet hoses, thermostat inlet/outlet joints, throttle body coolant hoses etc. All of these could leak and cause the smell to enter the passenger compartment.
What about the occasional misting on the windshield?
Sr. Member
Nov 18, 2011
514 posts
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SCARBOROUGH
Change the heater core, that stop leak stuff might f up your engine.
Deal Expert
Mar 23, 2004
20259 posts
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DON'T use stop leak. That stuff will just block up your heater core (and you'll have no heat) or worse, it will block up other parts of the cooling system like the radiator.
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Dec 20, 2005
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duffer wrote:
Dec 4th, 2012 6:31 pm
What about the occasional misting on the windshield?
Is the misting on the windshield when you get in the car? or does it form after you turn the heat on? Does it have an oily feel or water in your fingers?
If it forms after you turn the heat on and wasnt there before then yes heater core sounds like the culprit. But i'm just hoping you're not mistaking condensation for the wrong thing. You said only when raining...which would suggest when air is humid and condensation occours.

Like I said check all the above hoses for signs of leaks, white residue dried on them etc. Unless you just want to change the heater core for peace of mind but think how great you'll feel when you smell the coolant still with the new core...
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ES_Revenge wrote:
Dec 4th, 2012 6:56 pm
DON'T use stop leak. That stuff will just block up your heater core (and you'll have no heat) or worse, it will block up other parts of the cooling system like the radiator.
+1

A 1998 escort in good condition....DESERVES better !
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TRAIN HARD !!!!
[OP]
Newbie
Jan 24, 2009
80 posts
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Ottawa
For sure there is no moisture on the floor. Just went on a quick errand and it is raining.
No misting on starting, none when the defrost for windows is on, good heat, needle in the middle, checked coolant level and it looks fine....No obvious leaks in any other hoses.......... Faint odd smell (even a taste) of something...????
I will keep an eye on it until it gives a better indication that there is something to be concerned about...that is how it has done me well to date...
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Dec 20, 2005
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duffer wrote:
Dec 4th, 2012 7:41 pm
For sure there is no moisture on the floor. Just went on a quick errand and it is raining.
No misting on starting, none when the defrost for windows is on, good heat, needle in the middle, checked coolant level and it looks fine....No obvious leaks in any other hoses.......... Faint odd smell (even a taste) of something...????
I will keep an eye on it until it gives a better indication that there is something to be concerned about...that is how it has done me well to date...
How did you taste something??? Please tell me you didnt swipe your finger on the window and lick it or something lol
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[OP]
Newbie
Jan 24, 2009
80 posts
1 upvote
Ottawa
No just the smell is almost like I can taste it....
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