10/15/2009
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Figure 1
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Figure 2
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Figure 3
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VAG 1342 Pressure Tester
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Loss of Oil Pressure on Audi 2.8L Engines
Affects 2.8L V6 Engines with Engine Code AAH (All Model Years). Immediately after starting, the oil pressure warning light remains lit.
Condition
Immediately after starting, the oil pressure warning light remains lit.
Service
Measure oil pressure.
Vehicles with automatic transmission
Remove the oil cooler line bracket to provide clearance for connecting the VAG 1342 Pressure Tester.
All vehicles
Remove the 0.3 bar oil pressure switch (Figure 1). Install VAG 1342 oil pressure tester in place of the oil pressure switch “B” do NOT connect the wiring. Start the engine and let idle. Raise the engine speed to 2,000 rpm. Oil pressure must be 4.5 to 6.0 bar.
If the measurement is outside of the specification. Replace the engine oil pump. Inspect the front camshaft bearings on each cylinder head for possible damage (Figure 2). Repair or replace as necessary.
Inspect the crankshaft main, and rod bearings for possible damage (Figure 3). Repair or replace as necessary.
Some or all of this information was provided by the Automotive
Parts Remanufacturers Association (APRA). For more information on
technical bulletins available through APRA call 703-968-2772 or visit www.AutoBulletins.com.