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Thread: Which Antifreeze?

  1. #1
    Regular Member paz_badboy4life's Avatar
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    Vehicle : Vectra SRi Dual Fuel NAV

    Trim : PreFace SRi

    Engine : 1.8 LPG

    Year : 53

    Question Which Antifreeze?

    Hey guys. I will be attempting to change my antifreeze myself this week. Just wondering what people would recommend?? I've seen some @ Halfords & EuroCarParts, that's about it really. My car is a 1.8 dual fuel so it runs a lot hotter than a normal 1.8. Any help n advice much appreciated.

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    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

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    Red OAT an surprising Vauxhall is cheaper than the motor factors.

    Even cheaper on trade card

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    Regular Member Das's Avatar
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    Vehicle : Lada

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    Year : 1954

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  4. #4
    Regular Member paz_badboy4life's Avatar
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    Vehicle : Vectra SRi Dual Fuel NAV

    Trim : PreFace SRi

    Engine : 1.8 LPG

    Year : 53

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    Thanks guys. Will enquire with Vaux on Monday. Just wondering, where is the drain plug located for the antifreeze?

  5. #5
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

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    Year : 2003

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    Right hand side of radiator

    or just remove the bottom rad hose. Makes about of a mess but its quicker

  6. #6
    Regular Member paz_badboy4life's Avatar
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    Vehicle : Vectra SRi Dual Fuel NAV

    Trim : PreFace SRi

    Engine : 1.8 LPG

    Year : 53

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    Brill. Thanks mate. That's my task to do for my week off this week lol.

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    Quote Originally Posted by Critch View Post
    Right hand side of radiator
    LH side if looking from the front of the car.

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    TBH colour is not a unique identifier of coolant properties. The price most often makes the Extended Life versions cheaper in long run.

    Types of Coolant and Antifreeze

    Today's coolant market is confusing. In days past all coolant was the green ethylene glycol variety, but not anymore. Now it seems that every car manufacturer has at least one color of coolant.

    What Type of Antifreeze Should I Use?

    All Makes and Models
    Extended Life 150,000 Miles
    Green, Red, Yellow, Orange, Pink, Blue


    There are a lot of coolant types to choose from when you go to a well stocked auto parts store, so which one works best in your car? The simple answer is, well, simple: use what came in your car. However, sometimes it may be difficult to decipher what the original equipment manufacturer (OEM) used, especially if you purchased your car used.

    In the spirit of trying to keep this often times confusing subject simple, we will review the three basic types of automotive coolant: Inorganic Acid Technology (IAT), Organic Acid Technology (OAT), and Hybrid Organic Acid Technology (HOAT).

    IAT coolants are the "traditional green" variety used in virtually all American vehicles from the late 1920s to the mid to late 1990s. Like all antifreeze, it is naturally clear; its color comes from dye. Unlike the other types of antifreeze, it uses silicate and phosphate corrosion inhibitors to protect the metal parts of the engine and cooling system. However, these inhibitors wear out quickly, so IAT type coolants need to be flushed every two years or 30,000 miles.

    OAT coolants typically do not use silicate and phosphate corrosion inhibitors. Different manufacturers use different chemical additives to battle rust and corrosion, and they all dye their coolants different colors. GM's ubiquitous DEX-COOL coolant is an OAT antifreeze dyed orange. Toyota, Volkswagen, and Audi all use their own formulas that happen to be dyed pink. Honda uses a dark green dye. OAT coolants have longer service lives than IAT coolants, needing to be flushed every 5 years or 150,000 miles.

    HOAT coolants use different additives than OAT, but also use some silicate to protect aluminum surfaces. Modern Ford, Chrysler, and most European vehicles use their own HOAT coolant formulas. Ford's is dyed yellow and Chrysler's is orange (not to be confused with DEX-COOL). Both use the marketing name of GO-5. HOAT coolant has the same service interval as OAT (5 years or 150,000 miles).


    Summary

    IAT - Used in early to mid-late 90's Domestic vehicles
    OAT - Used in late 90's GM and most Asian vehicles
    HOAT - Used in 2000's Fords, Chryslers, and most European vehicles


    Coolant Cocktails?
    Although you can mix coolant types without harm, it is highly recommended against. If you mix an OAT or HOAT with an IAT, you will lose the extended service life of the OAT or HOAT coolant. Some people say that if you mix these types of coolant it can result in the coolant gelling, but if you keep your cooling system well maintained, this should not be a problem. In general, do not make coolant cocktails!

    And finally, what about the "Universal, All Makes, All Models" coolant you see stuffing store shelves? Basically, those are OAT DEX-COOL clones so appropriate only if your vehicle is designed for OAT coolant.
    Last edited by SpiD; 23rd September 2012 at 05:51.

  9. #9
    Regular Member paz_badboy4life's Avatar
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    Vehicle : Vectra SRi Dual Fuel NAV

    Trim : PreFace SRi

    Engine : 1.8 LPG

    Year : 53

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    thanks matey. i think i will just go for whats already in my car, its Orange so im guessing its OAT?

  10. #10
    Regular Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

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    Should be, As Critch said just go to VX PAZ. Retail is £14.95+vat for 5lt, my local motor factors were nearly £20.

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