Engine - Inspect For Debris In Transferred Assemblies
Audi A4 Quattro Sedan (8K2) L4-2.0L Turbo (CAEB) Page 614
10 Engine replacement, checking for debris lodged in transferred assemblies
10 10 02
2018288/3
September 14, 2010
Supersedes Technical DIAGNOSIS AND REPAIR Group 10 number 08-05 dated November 20, 2008 for reasons listed below.
AFFECTED VEHICLES
CONDITION
Prior to engine replacement, any debris lodged in transferred assemblies must be removed.
TECHNICAL BACKGROUND
If the vehicle's engine experienced a serious mechanical problem, it is possible that small pieces of metal debris resulting from the mechanical
problem may have become deposited in the intake manifold, air intake hoses exhaust manifolds, exhaust down-pipes, turbocharger, supercharger
and/or the intercooler.
Note:
If these pieces are not removed prior to the installing and operating the replacement engine, the pieces may be drawn into the combustion chamber
and cause a knocking noise and subsequent serious engine damage.
PRODUCTION SOLUTION
Not applicable.
SERVICE
Prior to installation of replacement engines, thoroughly inspect and clean the intake manifold, air intake hoses, exhaust manifold, exhaust downpipes,
turbocharger, supercharger and intercooler.
This is especially important on engines with two stage or variable intake manifolds, which must be checked internally for any signs of debris.
^ If any debris is evident in the intake manifold or cylinder heads ports, replace the manifold. Cleaning of the internal intake paths cannot be 100%
guaranteed. Debris can be lodged in the inner parts of the manifold until the manifold changes intake lengths. The debris may then loosen and
travel into the replacement engine and may cause damage to the replacement engine.
^ This does not mean that every engine replacement will need a new intake manifold. It depends on the extent of mechanical damage.
Audi A4 Quattro Sedan (8K2) L4-2.0L Turbo (CAEB) Page 615
Tip: Engine damage caused by failure to clean debris from assemblies that are transferred to a replacement engine is not covered by Warranty.
WARRANTY
This TSB is informational only and not applicable to any Audi warranty.
REQUIRED PARTS AND TOOLS
No special tool or parts required.
ADDITIONAL INFORMATION
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
manuals for the latest information.
