coolant smell only when initially starting heat - Page 2 - JeepForum.com
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post #16 of 25 Old 04-30-2017, 11:55 AM Thread Starter
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Originally Posted by Jerry Bransford View Post
X2. It is normal for pure water (condensation from the a/c system) to drip out of that tube but coolant should not be in the water.
yeah it is definitely draining water. But should this be draining even if the AC is not on?

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post #17 of 25 Old 04-30-2017, 11:57 AM Thread Starter
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ok so update... I brought is to my radiator guy and had him take a look. He thought he saw a leak on the passenger side of the lower part of the radiator because there was a small puddle there and he put what looks like kitty litter into the radiator and said it may fix it. It did not. I still smell coolant but I don't see that wet spot on the radiator anymore... the plot thickens.
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post #18 of 25 Old 04-30-2017, 02:14 PM
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So would I be correct in assuming that if there was something wrong with the heater core I should smell coolant or fog up the windows even when the heat is off?
Not necessarily. When the heat is off, the blend door is blocking airflow through the core. No airflow means you may not have the smell brought up to your nose, or it is so diluted by the fresh air bypassing the core that you don't notice it. Similar for the fogging.
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post #19 of 25 Old 04-30-2017, 03:54 PM
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you might have a hose clamp seeping on the heater core as it cools off, try plugging the heater core off to check for the smell. other wise just deal with it till it gets worse.
try laying cardboard under the jeep over night see if you get drips.

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post #20 of 25 Old 05-01-2017, 06:50 AM
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He thought he saw a leak on the passenger side of the lower part of the radiator because there was a small puddle there and he put what looks like kitty litter into the radiator and said it may fix it.
You can't pass a pressure test with a leak large enough to cause a "puddle". Sounds like the dealership either screwed up the test or worse they simply lied. In my experience having an independent mechanic look at any potential issues is better than letting the dealership who is trying to sell you the car do the diagnosis or inspection.

Throwing stop leak junk at the problem is at best a temporary solution and at worst known to gunk up your coolant system in very undesirable ways. I would eliminate this mechanic from the list of folks to which I bring my vehicles. I'd also recommend you not let anyone put things that look like kitty litter or anything that doesn't look like coolant into your coolant system.

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post #21 of 25 Old 05-01-2017, 09:56 AM
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So would I be correct in assuming that if there was something wrong with the heater core I should smell coolant or fog up the windows even when the heat is off?
If the core is leaking then yes, the coolant thru the heater core is constant.

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post #22 of 25 Old 05-05-2017, 12:23 PM Thread Starter
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update...it was th heater core. I bypassed it and the smell was gone so i bit the bullet and just replaced the heater and evaporator core. I was told the coolant was very acidic so I guess it wasn't changed in a while. Any suggestions as to what fluids I should be replacing prophylactically on this jeep? 2004 new to me. brake fluid maybe? the brakes do feel a bit spongey
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post #23 of 25 Old 05-05-2017, 12:35 PM
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update...it was th heater core. I bypassed it and the smell was gone so i bit the bullet and just replaced the heater and evaporator core. I was told the coolant was very acidic so I guess it wasn't changed in a while. Any suggestions as to what fluids I should be replacing prophylactically on this jeep? 2004 new to me. brake fluid maybe? the brakes do feel a bit spongey
Brake fluid should be flushed/replaced periodically. If you don't know when it was done last, then it's probably time to do it.
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post #24 of 25 Old 05-05-2017, 03:06 PM
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Any suggestions as to what fluids I should be replacing prophylactically on this jeep?
Were it me, I'd swap out all fluids, especially since the dealer's word is suspect.
Engine oil and filter
Differentials (F/R)
Tranny (if manual)
Transfer case
Brake fluid
Read up on which fluids will suffice, especially your tranny.
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post #25 of 25 Old 05-05-2017, 03:10 PM
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update...it was th heater core. I bypassed it and the smell was gone so i bit the bullet and just replaced the heater and evaporator core. I was told the coolant was very acidic so I guess it wasn't changed in a while. Any suggestions as to what fluids I should be replacing prophylactically on this jeep? 2004 new to me. brake fluid maybe? the brakes do feel a bit spongey
DOT 3/4 brake fluid is what you want, avoid DOT 5 which is incompatible. Synthetic brake fluid is best. Zerex G-05 is a great choice of coolant, make sure to only dilute it to 50:50 with distilled water, don't use tap water.

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