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Old 09-25-2017, 10:49 PM   #1
Kettamean
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coolant smell

Abruptly today the inside of my car started to smell like--what I would describe as--a coolant smell while the fan was on.
No visible leaks under the hood, no drips under the car, no CEL, no temperature concerns.

Any trouble shooting suggestions?
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Old 09-25-2017, 11:06 PM   #2
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Pull the plastic cover under the engine and look at the thermostat.
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(Mostly) Posted by Josh/AWE. Flapper valves are open at idle, close after 1100 RPM during part throttle. Full throttle 1st-4th gear the valves open until throttle let off. 4th gear, 1500 RPM to full throttle closed, closed until 3500 RPM, then open until lift off throttle.
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Old 09-26-2017, 04:19 PM   #3
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Pull the plastic cover under the engine and look at the thermostat.
Thanks. I'll be installing JB4 this week, so I'll have a good chance to check.

Oddly, my drive this morning had zero smell.
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Old 09-26-2017, 07:52 PM   #4
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Sure it wasn't from a car you were following?
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Old 09-28-2017, 07:28 PM   #5
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Sure it wasn't from a car you were following?
No it's back. And there's a slight greasy film on the windshield, so it looks like I'll need some warranty work done.
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Old 10-06-2017, 12:16 AM   #6
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No it's back. And there's a slight greasy film on the windshield, so it looks like I'll need some warranty work done.
Any update on the coolant smell?
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Old 10-06-2017, 03:25 AM   #7
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Any update on the coolant smell?
taking it into the dealership in the morning.

I have found that there is also a washer fluid smell coming through the vent, if I use my wipers. For the life of me, I can't pinpoint any leaks. We'll see what the dealer says.
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Old 10-06-2017, 02:45 PM   #8
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taking it into the dealership in the morning.

I have found that there is also a washer fluid smell coming through the vent, if I use my wipers. For the life of me, I can't pinpoint any leaks. We'll see what the dealer says.
If you use your wipers or wash your windshield?
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Old 10-06-2017, 04:19 PM   #9
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If you use your wipers or wash your windshield?
*use the washer fluid, not if I'm only using the wipers
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Old 10-06-2017, 08:02 PM   #10
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Dealership found no leaks or issues. I’m just going to watch it for now.

On the plus side, I left my dealership appointment and immediately installed my JB4. Now it’s time to see what I think ��
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Old 11-01-2017, 07:42 AM   #11
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Heater core. If it leaks it will leak into the car and will smell.

https://youtu.be/ELprS6sj0mU

Also composite water pump. It would leak down the oil pan

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Old 11-01-2017, 07:58 PM   #12
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My engine from day 1 has always had a burning smell of coolant every now and then especially with fans on or when its idling. Coolant level has never dropped its pretty strange. Never found visible signs of leaks or coolant stains anywhere near the front, bottom, side, or rear.
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Old 11-20-2017, 02:47 AM   #13
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I occasionally get the stink of coolant too. If you're getting a greasy film on the inside of your windshield chances are it's the heater core. Next time you get the stink hit the defrost button and turn the fan up. Make sure the engine is hot. If the leak is bad enough you should get stinky steam coming out of the defroster vents.
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(Mostly) Posted by Josh/AWE. Flapper valves are open at idle, close after 1100 RPM during part throttle. Full throttle 1st-4th gear the valves open until throttle let off. 4th gear, 1500 RPM to full throttle closed, closed until 3500 RPM, then open until lift off throttle.
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Old 11-24-2017, 05:49 PM   #14
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If you're getting a greasy film on the inside of your windshield chances are it's the heater core.
It's almost certainly the heater core, based on those two symptoms.
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Old 11-25-2017, 02:22 PM   #15
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Have not heard of a heater core failing for well over 10 years. I would be surprised if it is but hope it isn't, as it is a real PITA to replace in older cars, the Golf will be a nightmare.
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Old 12-05-2017, 12:38 AM   #16
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Have not heard of a heater core failing for well over 10 years. I would be surprised if it is but hope it isn't, as it is a real PITA to replace in older cars, the Golf will be a nightmare.
LOL, and there wasn't all of the sound deadening and under dash trim then. Early 60's Mustangs and Falcons were fun, you needed to remove the entire housing and open it up.

I knew a mechanic at a Chevy dealer who traded in his old 'Vette because he didn't want to replace his heater core. Guess who the dealer had do it.,
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(Mostly) Posted by Josh/AWE. Flapper valves are open at idle, close after 1100 RPM during part throttle. Full throttle 1st-4th gear the valves open until throttle let off. 4th gear, 1500 RPM to full throttle closed, closed until 3500 RPM, then open until lift off throttle.
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Old 12-05-2017, 01:31 PM   #17
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My coolant reservoir cap had some pinkish crust on it. The dealership cleaned it off and put some sort of goop, which almost looks like a white silicone grease, near the upper threads. It has fixed my issue for several months now.
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