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Nov 13, 2020 16:19:10 GMT
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So i visit Halfords for anti freeze and I'm met with confusion. What happened to glycol? all I can see is "silicate" antifreeze, of course asking for assistance caused confusion and left to ask the initiated on here. Have things changed this much in a few years?
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shin2chin
Part of things
Making curse word cars slightly better
Posts: 820 
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Nov 13, 2020 16:37:39 GMT
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You can still get glycol antifreeze, obviously not at Halfords tho
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1977 PORSCHE 2.0na 924
1974 VW Beetle 1600
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adam73bgt
Club Retro Rides Member
Posts: 4,864
Club RR Member Number: 58
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Anti freezeadam73bgt
@adam73bgt
Club Retro Rides Member 58
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Nov 13, 2020 18:26:58 GMT
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ferny
Club Retro Rides Member
Posts: 983
Club RR Member Number: 13
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Anti freezeferny
@ferny
Club Retro Rides Member 13
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Nov 13, 2020 18:33:55 GMT
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I gave up getting it from Halfords and use ECP. They normally have a discount code and you can buy 5lt. I don't think it's great stuff, but I tend to change it after a year anyway.
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Nov 13, 2020 18:51:49 GMT
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The antifreeze bit is exactly the same - Ethylene glycol. The important job that antifreeze does all year round is corrosion inhibition. The new pink antifreeze - silicate type or OAT lasts for 5 years wheras the old blue type only lasts for 18 months. As a consequence the old blue type has fallen out of use , why bother with it, when it does an inferior job and no one specifies it any longer.
Peripherally - antifreeze is toxic to life , whether walking or fishy , so the less often it gets changed , then the less there is of it in the environment, if anyone cares.
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Rich
Club Retro Rides Member
Posts: 6,237
Club RR Member Number: 160
Member is Online
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Anti freezeRich
@foxmcintyre
Club Retro Rides Member 160
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The antifreeze bit is exactly the same - Ethylene glycol. The important job that antifreeze does all year round is corrosion inhibition. The new pink antifreeze - silicate type or OAT lasts for 5 years wheras the old blue type only lasts for 18 months. As a consequence the old blue type has fallen out of use , why bother with it, when it does an inferior job and no one specifies it any longer. Peripherally - antifreeze is toxic to life , whether walking or fishy , so the less often it gets changed , then the less there is of it in the environment, if anyone cares. Indeed. But putting pink OAT antifreeze in an older system that’s been run on blue in my experience tends to cause weeps as it eats at the seals and gaskets. In that situation a good quality ‘blue’ antifreeze like the Comma listed above. |
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ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
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Anti freezeChasR
@chasr
Club Retro Rides Member 170
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They work differently as stated. In a nutshell
IAT : Puts in a boundary layer in the cooling system to as to prevent corrosion. This is why Phosphate coolants are not used in the UK as it can cause issues with hard water.
OAT: It has active corrosion inhibitors, which seek out and tackle the corrosion. This is why it lasts alot longer, but also why it can cause leaks on older engines where coolant changes may not have been as frequent, and where poor quality coolants may have been used. It can attack solder joints too on older copper rad setups, but I've been lucky with this. In my MGB it caused no issues.
But I've found not all coolants are made the same. For this reason I'd always recommend the following
IAT : Comma Glytasyn G48 ; it's OEM for older BMWs and Mercs, and it seems to truly resist rust. I've not had UniPart's CoolBlue be anywhere near as effective, even on a freshly flushed coolant system.
I've not used their Coldmaster so I can't comment on that.
OAT : One of the Commas (G30 is a common one), or the OEM coolants from the factory. The Ford 10 year stuff works very well IME. Even on cars I'd had it in doing 200k, it still comes out very clean with minimal staining inside the cooling system.
When I did the thermostat and water pump on my Mondeo (now on 185k), they came out like they were brand new. I almost wished I didn't change the water pump now, as it was a factory Volvo pump, and it was the original pump to the car.
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Last Edit: Nov 15, 2020 3:00:08 GMT by ChasR
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