Check The Cooling System For Leaks
Condition
- Check for leaks using Cooling System Tester:V.A.G 1274B .
The cooling system can be under pressure. Risk of scalding by hot steam and hot coolant.
Possibility of scalding the skin and other parts of the body.
- Wear safety gloves.
- Wear protective eyewear.
- Reduce the pressure: cover the coolant expansion tank cap with a suitable towel and carefully open.
-- Open the caps -arrow-.
-- Screw the Adapter:VAS 691 005/5 -1- on the coolant expansion tank -2-.
-- Connect the Cooling System Tester:V.A.G 1274B -3- to the adapter -1-.
-- Operate the hand pump multiple times and create a pressure of 1.5 bar (21.76 psi).
Condition
- The pressure must not decrease by more than 0.2 bar (2.9 psi) within 10 minutes.
-- If the pressure falls more than 0.2 bar (2.9 psi), search for leaks and correct the problem.
Tip
The pressure loss of 0.2 bar (2.9 psi) within 10 minutes is due to the cooling of the coolant. If the temperature of the coolant is equal to the ambient temperature, no loss of pressure is permitted.
Condition
- When leaks have been found and repaired, then the leak test must be repeated.
-- Drain the pressure from the cooling system tester and from the coolant expansion tank.
-- Open the cap.