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Changing the antifreeze/coolant
- Graphite675
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- jim
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12 Nov 2015 18:20 - 12 Nov 2015 18:22 #156124
by facade
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
Replied by facade on topic Changing the antifreeze/coolant
The radiator drain only drains the radiator. Most of the water stays in the engine block and the heater.
However, The Manual says to drain it here, top up again, leave the rad cap off and run the engine until the top hose gets hot (thermostat open) then drain again, and repeat until the water is clear.
This avoids nasty airlocks in the heater.
Then you empty out the expansion bottle, tip the required amount of neat antifreeze into the radiator and fill with water, (I usually squeeze & release the hoses a few times to get air out) run the engine (rad cap off) until the thermostat opens, whilst adding water to keep it full, then pop the rad cap back on, and half fill the expansion bottle with antifreeze mixture.
Run until the temperature gauge comes up, then switch off, and when cold, fill the radiator right to the top, fill expansion bottle to the line, and check the level in the bottle when the engine is cold a few times over the next couple of days.
Don't ever take the radiator cap off when the engine is hot - you can leave it off from cold and then run the engine.
However, The Manual says to drain it here, top up again, leave the rad cap off and run the engine until the top hose gets hot (thermostat open) then drain again, and repeat until the water is clear.
This avoids nasty airlocks in the heater.
Then you empty out the expansion bottle, tip the required amount of neat antifreeze into the radiator and fill with water, (I usually squeeze & release the hoses a few times to get air out) run the engine (rad cap off) until the thermostat opens, whilst adding water to keep it full, then pop the rad cap back on, and half fill the expansion bottle with antifreeze mixture.
Run until the temperature gauge comes up, then switch off, and when cold, fill the radiator right to the top, fill expansion bottle to the line, and check the level in the bottle when the engine is cold a few times over the next couple of days.
Don't ever take the radiator cap off when the engine is hot - you can leave it off from cold and then run the engine.
If it suddenly breaks, go back to the last thing that you did before it broke and start looking there
Last edit: 12 Nov 2015 18:22 by facade.
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- Graphite675
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