How to remove build-up of scale at the t-stat neck. ?
#3199721
12/23/23 09:27 PM
12/23/23 09:27 PM
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Joined: Jan 2003
Posts: 7,545 Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,545
Albany, NY
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Hey guys, Merry Christmas!
What have you used to remove mineral deposits or scale build-up in your coolant system? I see some products advertised, but what do you recommend to get rid of it?
I got a bunch of crusty mineral deposits in my cooling system, it is on the t'stat neck and crept in under the coolant hose and gave me pitting corrosion on the neck of the t'stat housing. There is some on the tops of the radiator core tubes.. must be more of it in places I can't see. I wire brushed the snot out of the t'stat housing, and primed and painted it really good. I plan on gooping the neck with sealant before sliding the hose back on and clamping it. That should conceal the sealant under the hose and keep it OEM looking.
I researched the background and basically it seems that decay of the corrosion inhibitors in the ethylene-glycol coolant can lead to chemical changes that then deposit themselves as scale. My lesson learned seems to be to flush and refresh the anti-freeze every 3-5 years.
Thanks, - Art
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: How to remove build-up of scale at the t-stat neck. ?
[Re: Neil]
#3199736
12/23/23 10:50 PM
12/23/23 10:50 PM
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Joined: Jan 2003
Posts: 7,545 Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,545
Albany, NY
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Thanks Neil, There are a bunch of products making claims, thanks for recommending one that has a decent following.
Glad to hear from anyone else too..
Cheers, - Art
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: How to remove build-up of scale at the t-stat neck. ?
[Re: TJP]
#3199763
12/24/23 06:07 AM
12/24/23 06:07 AM
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Joined: Jan 2003
Posts: 10,763 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,763
North Dakota
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The glycol in anti-freeze never wears out unless it's been overheated. The corrosion inhibitors simply go away with time. With the price of anti-freeze being what it is, I'm starting to drain it every five years or so, filter it, and add this schmoo or something similar. Cooling Sytem Corrosion Inhibitor
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: How to remove build-up of scale at the t-stat neck. ?
[Re: 6PakBee]
#3199865
12/24/23 03:58 PM
12/24/23 03:58 PM
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Joined: Jan 2003
Posts: 7,545 Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,545
Albany, NY
|
Thanks again Neil. I got some Evapo-Rust from the parts store for descaling the individual parts and will order in some Thermocure. I'm glad to read that the chemicals are harmless for all metals, aluminum, copper, brass. They talk about rust and scale but no mention of mineral deposits or am I missing something ? not trying to be an a-- just trying to clarify for the OP TJP. ... 'scale' is a mineral deposit.. .. In my case it's a blue/green crunchy crud built up on my aluminum parts. The glycol in anti-freeze never wears out unless it's been overheated. The corrosion inhibitors simply go away with time. With the price of anti-freeze being what it is, I'm starting to drain it every five years or so, filter it, and add this schmoo or something similar. Cooling Sytem Corrosion Inhibitor yes, it seems the inhibitors decay and that leaves the ethylene glycol at risk of reacting with the metals.. if you leave the coolant in your engine too many years.. Here is the article I found describing how 'uninhibited ethylene glycol' in a cooling systems can degrade and contribute to corrosion and scaling.. https://www.boydcorp.com/blog/avoiding-galvanic-corrosion.htmlI have to track and refresh my coolants more often. Cheers, - Art
Last edited by 67SATisfaction; 12/24/23 03:59 PM.
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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