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Cooling System Flush


Synesthesia
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Originally posted by xedosman

 

Anyway I get ALL the air out prior to starting the engine this way: jack up right front 8 inches to make the engine filler cap the highest point, without competition. Air in water will go upwards, simple logic smile.gif Then add coolant through the engine filler neck untill it appears full. Squeeze the radiator hoses gently. Allow the air to escape, this takes a while, you can hear it burping through the tiny thermostat hole. Top off with coolant as the air escapes, during like 5 -10 minutes. When no more coolant will go in there, fill it to the rim, and put on the filler cap. Then fill up the coolant reservoir to maximum level. Jack down the car and drive untill warm. If done this way, no further refill should be neccessary.At least this method works for me. To ensure correct mixture, I fill one litre glycole, then one litre water, another litre of glycole etc. This ensures correct mixture of 50 %. Don't be tempted to go below 50% mixture. The coolant won't be able to prevent corrosion and buildup as good as intended if the mixture is too low. Obviously coolant meant for alloy engines is mandatory. And no mixing with the red type coolant.

 

*Bonus - why you shouldn't mix coolant types*

 

The cooling system has three dissimilar metals to deal with; Aluminum (block), Steel (some radiators and heater core), and Copper (most radiators).

 

When you link the dissimilar metals through an electrolyte (IE Coolant) you experience what is called galvanic corrosion. The metals interact with each other and tend to break themselves down at an accelerated rate.

 

The different grades of coolant strive to minimize this. Each grade is suited for certain groups of metals.

 

 

WAAYY TOO Much info! but you asked... and knowing is half the battle.

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