Antifreeze coolants and their use in MGBGTV8 engines
Concerns over the effects new types of antifreeze have on older engines have been raised by the Federation of British Historic Vehicle Clubs. Tony Lake provides a useful guide to the key issues. His more detailed article is available on the V8 website, see below.

Summary of the recommendations:
o
When changing coolant use a 50/50 mixture of Traditional Antifreeze and water. Select a brand that is suitable for classic cars, it will meet BS 6580, the main constituent will be either mono ethylene glycol or mono propylene glycol, properties will be shown on the can or in a data sheet.
o
At subsequent checks with engine cold always top up through the radiator filler cap with the same mixture used for initial fill, check and adjust level in expansion tank. Never top up with raw water.
o
Don't mix different brands of antifreeze because formulations do vary and may not be compatible, so follow manufacturer's advice.
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Change the coolant every 2 years or at the interval recommended on the can or in the data sheet.
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Replace defective hoses if they are cracked or perished. Troubleshoot leakage by examining connections, replace if badly corroded.
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Make sure that the expansion tank pressure cap is sound. If in doubt replace it - it's not expensive!
o
Make sure air flow through the radiator is unimpeded.

Posted: 080412


Antifreeze coolants and their use in MGBGTV8 engines, a summary article by Tony Lake. More

Antifreeze coolants and their use in MGBGTV8 engines, a longer detailed article by Tony Lake. More

Concerns with modern antifreeze formulations for classic MG enthusiasts - see our report on the suitability of current antifreeze formulations for use in classic cars following a recent newsletter from
the Federation of British Historic Vehicle Clubs (FBHVC).
More

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