M20 Coolant
Moderator: martauto
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fastdave
- E30 Zone Newbie

- Posts: 146
- Joined: Thu Nov 10, 2005 11:00 pm
Does anyone know how much coolant in litres does a m20 engine need going to upgrade it please
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Speedtouch
- Old Skooler

- Posts: 14123
- Joined: Tue Feb 14, 2006 11:00 pm
- Location: Canterbury
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.
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.
viewtopic.php?f=6&t=279421
ECU Upgrade EPROM Chips, £40 posted within the UK. Note these are not Zone chips.
viewtopic.php?f=6&t=279421
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Brianmoooore
- E30 Zone Team Member

- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 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.
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.
