A8L Quattro Sedan W12-6.0L (BSB) (2005)
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Thermostat Bypass Hose: Customer Interest
Cooling System - Coolant Loss
19 Coolant loss because of excessive coolant pressure - 6.0L
19 10 05
2017940/3
June 10, 2010
Supersedes Technical Service Bulletin Group 19 number 08-19 dated November 21, 2008 for reasons listed below.
Affected Vehicles
Condition
Coolant loss because of excessive coolant system pressure.
Technical Background
Certain driving conditions lead to excessive pressure in the coolant circuit. This can lead to leaks on the hose connections or the main radiator.
Production Solution
Bypass solution to reduce pressure in the coolant circuit.
Service
Reroute coolant hose
1. Put lock carrier in service position.
