Tracing Coolant Smell
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Lead Driver
Joined: Mar 2004
Posts: 5,372
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From: Northern Indiana
Tracing Coolant Smell
Okay everytime I get out of my truck and walk by the front of it I smell coolant. It has brand new radiator, thermostats, Hoses, overflow tank and overflow feed hose. I have looked and can’t see any coolant leaking anywhere. Resovior level doesn’t drop and none in the oil. New caps on both the overflow and fuel cooler as well. Any thoughts or ideas?
Hotshot
Joined: Jul 2013
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since no fluid loss...and only in the front...my thoughts are get a coolant PSI guage and see what the PSI is after you park it. if its habitually maxed out...16PSI or more...your degas bottle is venting and thats what you are smelling.
why would it vent moreso than not...high water to coolant ratio extracts more heat from the engine...but...pushes towards the boiling point....gas bubbles will form.
you could also have fuel cooler degasing...or even evacuation....when the fuell cooler coolant runs hot it expands and drains thru that tube you see near the cap. there is no recovery...meaning...if it was setup for recovery as it gets hot and evacuates...it would get collected in a small tank...then when the coolant cools...the evacuated coolant would get sucked back in. in our trucks..there is no recovery..so evacuated coolant drainds thru the tube..on to the hot parts of your engine...boils...you then smell it.
I used a small OEMtools brake bleeder kit to make a fuel cooler collant recovery system. it successfully drains into the recovery tank...and when cooled..the coolant gets sucked back in thru the same tube back into the fuel cooler resivior.
these two would be the better of possible senerios so check those first.
why would it vent moreso than not...high water to coolant ratio extracts more heat from the engine...but...pushes towards the boiling point....gas bubbles will form.
you could also have fuel cooler degasing...or even evacuation....when the fuell cooler coolant runs hot it expands and drains thru that tube you see near the cap. there is no recovery...meaning...if it was setup for recovery as it gets hot and evacuates...it would get collected in a small tank...then when the coolant cools...the evacuated coolant would get sucked back in. in our trucks..there is no recovery..so evacuated coolant drainds thru the tube..on to the hot parts of your engine...boils...you then smell it.
I used a small OEMtools brake bleeder kit to make a fuel cooler collant recovery system. it successfully drains into the recovery tank...and when cooled..the coolant gets sucked back in thru the same tube back into the fuel cooler resivior.
these two would be the better of possible senerios so check those first.
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Lead Driver
Joined: Mar 2004
Posts: 5,372
Likes: 108
From: Northern Indiana
Okay. I have a pressure gauge. I am not following you on how to test the pressure without taking off the cap.
I did a 50/50 mix on refill, I wouldn’t think I have a lot more water but could get on of those testers to check the mix.
Do you have any any pictures of how you made the resivoir for the fuel cooler fritz?
I did a 50/50 mix on refill, I wouldn’t think I have a lot more water but could get on of those testers to check the mix.
Do you have any any pictures of how you made the resivoir for the fuel cooler fritz?
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Lead Driver
Joined: Mar 2004
Posts: 5,372
Likes: 108
From: Northern Indiana
I got it now. I had a pressure gauge plumbed into the cab but the copper line started leaking. So I pulled it out as I didn’t what red coolant stains on the carpet. I could always plumb it in at the overflow tank.
I just took it out about about a week ago. Before that when hot and up to temp I would see around 9-10 psi.
I just took it out about about a week ago. Before that when hot and up to temp I would see around 9-10 psi.
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