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post #1 of 36 Old 04-09-2019, 06:17 PM Thread Starter
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Coolant smell questions

So about a year and a half ago I put the truck under the knife. Truck got a new oil cooler, studs, and gaskets. Truck has been running just fine which is making this really frustrating. Over the past month I have been noticing a little coolant loss from time to time. My deltas are like 8* difference at like 80mph pulling a load. That being said I have noticed when I shut the truck off after getting home I notice a strong coolant smell. I normally don't use the a/c I normally just roll the windows down but last week I had the family with me so I used the ac. I noticed that while getting on the throttle I would smell coolant like it was coming through the vent. I know that this can be a egr cooler issue but mine was deleted years ago. I checked under the passenger side for signs of wetness under the heater core and it seems dry. Does anyone have some suggestions on what this could be? I am hoping it is not another head gasket but know that is an option. Oh I also don't every see a puddle under the truck.
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post #2 of 36 Old 04-10-2019, 01:57 AM
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The heater core is probably bad. It may be leaking just enough to evaporate and send the vapors into the air ducts. Do you see steam as well through air vents? Or just the smell? Does your windows fog up when you first start the truck and stays that way for a few minutes until the truck warns up (my car is doing this right now 😞 )?

These are signs that your heater core has broken.

https://thehappycar.com/5-signs-heater-core-busted/
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post #3 of 36 Old 04-10-2019, 04:58 PM Thread Starter
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my windshield does fog up most of the time but I figured it is just early in the am. Didn't notice steam but wasn't looking that hard.
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post #4 of 36 Old 04-10-2019, 05:38 PM
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Check and see if your passenger's side floorboard is damp or wet at all...

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post #5 of 36 Old 04-11-2019, 05:55 PM Thread Starter
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So I just put the truck through a little test today with no a/c on and no smell of coolant except when I shut the truck off I can smell it towards the front of the truck. I know the other day when I had the a/c on it was a bad smell when accelerating. Still don't feel any damp carpet on the passenger side under the heater core. Is it still possible that it is the heater core?
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post #6 of 36 Old 04-11-2019, 08:26 PM
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Quote:
Originally Posted by Shockley6.0 View Post
So I just put the truck through a little test today with no a/c on and no smell of coolant except when I shut the truck off I can smell it towards the front of the truck. I know the other day when I had the a/c on it was a bad smell when accelerating. Still don't feel any damp carpet on the passenger side under the heater core. Is it still possible that it is the heater core?
It's still possible, however, it's also possible that you have a small external leak and the smell is getting pulled through the vents. Time to bust out a good light and the telescoping mirror and give the ole' gal a thorough exam. Water pump, heater hoses, heater core valve on passenger side, radiator, etc. Check it all over good.

Your coolant system isn't pressurizing and puking out of your degas cap, right?

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post #7 of 36 Old 04-11-2019, 08:42 PM Thread Starter
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I do feel like it does gain some pressure but no puking. That is what has me confused. I'll try to give it the detailed inspection here in the next few days.
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post #8 of 36 Old 04-12-2019, 01:52 AM
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Fab up a psi sensor for the cooling system. Tee a line into the degas bottle with a sensor to see how much pressure it's building
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post #9 of 36 Old 04-12-2019, 08:47 AM
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Your local parts store may rent for free a coolant pressure tester. Mine didn't, but so had to buy one from harbor freight. Found three coolant links on my car using this kit.

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post #10 of 36 Old 04-12-2019, 10:03 AM
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[QUOTE=jokester00;16270671]It's still possible, however, it's also possible that you have a small external leak and the smell is getting pulled through the vents. Time to bust out a good light and the telescoping mirror and give the ole' gal a thorough exam. Water pump, heater hoses, heater core valve on passenger side, radiator, etc. Check it all over good.

Your coolant system isn't pressurizing and puking out of your degas cap, right?

-jokester[/QUOTE
Yes, check for leaks! When I first installed my coolant filter, I had a small leak from the heater core hose that would vaporize and send a coolant smell into the cab when the heat was running.
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