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Anti freeze smell.
#1415620 Fri Jul 02 2021 09:45 AM
Joined: Feb 2001
Posts: 7,000
W
'Bolter
After I changed the thermostat in my 1954 235 I have had the smell of antifreeze and the level when I top it off the water level drops to just above the core. I don't have an overheating problem and never have since I put a new aluminum one in 13 years ago. I also have the smell of antifreeze in the cab. ??????


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: Anti freeze smell.
WE b OLD #1415625 Fri Jul 02 2021 11:55 AM
Joined: Feb 2019
Posts: 2,087
P
AD Addict
Do you have a heater in the cab? If so it or the hoses may be leaking.


Phil

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Re: Anti freeze smell.
WE b OLD #1415633 Fri Jul 02 2021 01:45 PM
Joined: Feb 2001
Posts: 7,000
W
'Bolter
I have an after-market A/C heater combo and I have not found any damp spots. The smell does not become evident until the engine warms up.


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: Anti freeze smell.
WE b OLD #1415636 Fri Jul 02 2021 02:02 PM
Joined: Mar 2019
Posts: 1,295
G
'Bolter
What kinda overflow are you using if any?

Re: Anti freeze smell.
WE b OLD #1415638 Fri Jul 02 2021 02:53 PM
Joined: Dec 2020
Posts: 110
G
'Bolter
Must have some overflow on the radiator coils that need to burn off.


1958 3100 Apache 327 engine
Re: Anti freeze smell.
WE b OLD #1415641 Fri Jul 02 2021 03:43 PM
Joined: Mar 2010
Posts: 604
B
Curmudgeon
Why did you change the thermostat?

Re: Anti freeze smell.
WE b OLD #1415737 Sat Jul 03 2021 08:49 AM
Joined: Feb 2001
Posts: 7,000
W
'Bolter
To get more heat in winter. The overflow idea has merit. I have one of those caps that have the relief lever on the top and it was not seating properly. That could be the problem and someone suggested that I should wash the area down.


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: Anti freeze smell.
WE b OLD #1415754 Sat Jul 03 2021 01:42 PM
Joined: Dec 2020
Posts: 110
G
'Bolter
Fluid level might change with a different thermostat. I took my relief cap off.
Put on a cap ..I think its 14lbs rated.


1958 3100 Apache 327 engine
Re: Anti freeze smell.
WE b OLD #1415770 Sat Jul 03 2021 03:38 PM
Joined: Feb 2004
Posts: 23,001
H
'Bolter
The only reason to run a high pressure cap is so a vehicle with a tiny radiator can let the coolant get very hot without boiling over. Most modern cooling systems run between 195 and 230 degrees or so, and run anywhere from a 14 to a 17 pound cap. Most stovebolters get a case of the vapors and need a fainting couch if their coolant gets above 200 degrees. Since the boiling point of the coolant rises 3 degrees for every pound of pressure, even a 7 pound cap raises the boiling point to 233 degrees at sea level. A 15 pound cap takes the boiling point to 257 degrees. All a high pressure cap is good for on a mid-1950's or older truck is causing radiator and/or heater core leaks.
Jerry


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Re: Anti freeze smell.
WE b OLD #1415796 Sat Jul 03 2021 09:32 PM
Joined: Mar 2010
Posts: 604
B
Curmudgeon
To get more heat in the winter, for the engine coolant temperature or because it's cold inside the cab or both?
Adding a UV dye and using a UV lamp may help locate leaks. I've never tried it myself.

If you have closely inspected everything that was touched during the replacement and found no leaking, I would start thinking about things that may be affected by the increased temperature.
May not be the problem you have:
These engines, after many years, tend to collect rust in the coolant passages around #6 cylinder. If severe, it can cause that portion of the engine to overheat.
It happened to my cousin in a stock 50 Chevy. The car was a daily driver to and from work. He took it on a long vacation trip. It overheated.
The increased heat from the trip caused the rust to migrate. He flushed the radiator and the block several times. Luckily it finally cleared out.
The return home trip was normal.

Last edited by buoymaker; Sat Jul 03 2021 09:32 PM.
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