M20 Coolant

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fastdave
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Post Wed Jul 02, 2014 5:52 pm

Does anyone know how much coolant in litres does a m20 engine need going to upgrade it please
Speedtouch
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Post Wed Jul 02, 2014 6:02 pm

10.5 litres, or 11 litres if A/C is fitted, according to my Haynes manual.

Combined with approx. 1.5 litres of anti-freeze.
///M aurice
ECU Upgrade EPROM Chips, £40 posted within the UK. Note these are not Zone chips.
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fastdave
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Post Wed Jul 02, 2014 8:19 pm

Thanks Mate
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Brianmoooore
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Post Wed Jul 02, 2014 11:07 pm

Total capacities are correct, but I'd want a bit more than 1.5 litres to be neat antifreeze. You need 3.5 to 5.5 litres of that.
Note that you won't get anything like the full amount to drain out of a fitted engine without going to considerable trouble. The easiest way to do the job is to drain the radiator, flush the rest of the system out with clean water, and then refill with the required amount of neat antifreeze, followed by more clean water until the system is full.
After running the engine and bleeding out any residual air, the coolant level should be topped up with antifreeze/water mix at the required strength.