AUDI Installation Techniques 2 — Questions and Answers
Question 1: When installing an Audi direct injection fuel injector, what is the correct procedure for the copper sealing ring?
- Reuse the original ring if undamaged
- Always install a new copper sealing ring (Correct answer)
- Apply thread sealant to the ring before installation
- Heat the ring to 200°F before fitting
Correct answer: Always install a new copper sealing ring
A new copper sealing ring must always be installed with each injector to ensure a proper combustion chamber seal and prevent exhaust gas leaks.
Question 2: During installation of an Audi Quattro rear differential, what must be done to the output flange bolts?
- Torque to specification and leave permanently
- Apply blue Loctite and torque to spec
- Replace with new stretch bolts and torque in sequence (Correct answer)
- Reuse original bolts if threads are clean
Correct answer: Replace with new stretch bolts and torque in sequence
Audi rear differential output flange bolts are single-use stretch bolts that must be replaced and torqued in the correct sequence every time.
Question 3: When installing an Audi timing chain tensioner, why must the engine be positioned at TDC before removal?
- To prevent oil from spilling during removal
- To avoid valve-to-piston contact if the chain slips (Correct answer)
- To make the tensioner bolts easier to access
- To reset the camshaft position sensors
Correct answer: To avoid valve-to-piston contact if the chain slips
With the engine at TDC, the valves are in a safe position so that accidental chain movement will not cause the valves to contact the pistons.
Question 4: What is the correct technique for installing an Audi wheel bearing using a hydraulic press?
- Press on the outer race only to seat the bearing into the hub (Correct answer)
- Press on the inner race only to avoid bearing damage
- Apply force evenly to both races simultaneously
- Use an impact driver instead of a press for speed
Correct answer: Press on the outer race only to seat the bearing into the hub
When pressing a wheel bearing into the hub, force should only be applied to the outer race to prevent loading the bearing balls and damaging the bearing.
Question 5: When installing an Audi B8 platform control arm, what is the proper torque sequence for the pivot bushing bolt?
- Torque to spec with the suspension hanging freely
- Torque to spec only after the vehicle is at full curb weight (Correct answer)
- Torque to spec with the wheel elevated 6 inches
- Torque to spec and then rotate an additional 90 degrees immediately
Correct answer: Torque to spec only after the vehicle is at full curb weight
Suspension pivot bushing bolts must be torqued with the vehicle at full curb weight to prevent the rubber bushing from being pre-twisted and failing prematurely.
Question 6: During installation of an Audi 2.0 TFSI timing belt service kit, when should the tensioner pulley locking pin be removed?
- Before installing the new belt to set belt tension manually
- After installing the belt with the engine at TDC (Correct answer)
- Only after the engine has been cranked twice and returned to TDC
- Immediately after the belt is routed around all pulleys
Correct answer: After installing the belt with the engine at TDC
The tensioner locking pin is removed after the belt is installed with the engine at TDC, allowing the spring-loaded tensioner to automatically apply correct belt tension.
Question 7: What special tool is required when installing Audi 4.2L FSI V8 camshaft locking plates to prevent camshaft rotation during reassembly?
- T40070 camshaft locking tool set (Correct answer)
- 3548 crankshaft locking pin only
- VAG 1383A torque multiplier
- T10172 chain tensioner release lever
Correct answer: T40070 camshaft locking tool set
The T40070 camshaft locking tool set locks all four camshafts simultaneously to prevent rotation while installing and torquing the timing components.
AUDI Installation Techniques 2
When installing an Audi direct injection fuel injector, what is the correct procedure for the copper sealing ring?