Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINESYSTEM SPECIFICATIONSCAMSHAFT BEARING CAP TIGHTENING SEQUENCE & TORQUE
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Camshaft Bearing Cap Tightening Sequence & Torque
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Camshaft Bearing Cap Tightening Sequence & Torque
Camshaft bearing caps removing and installing
Camshaft bearing cap positions
Note: Numbers on bearing caps must appear upright when viewed from intake side.
Exhaust camshaft:
- Unbolt intermediate flange and rearmost bearing cap for camshaft position sensor housing.
- Remove bearing cap in front of drive chain, and bearing caps -2- and -3-.
- Gradually loosen bearing caps -1- and -4-, alternating in diagonal sequence.
Intake camshaft:
- Remove bearing cap -6- and -7-.
- Gradually loosen bearing caps -5- and -8-, alternating in diagonal sequence.
Installing
- Install camshafts with drive chain so that markings on sprockets are aligned with each other (arrows)
Notes: When installing the bearing caps, make sure that the stamped numbers appear upright when viewed from the intake side.
The contact surface of both outer bearing caps should be coated lightly with AMV 174 003 01.
Intake camshaft:
- Tighten bearing caps -5- and -8- evenly, alternating in diagonal sequence.
- Install remaining bearing caps.
Exhaust camshaft:
- Tighten bearing caps -1- and -4- evenly, alternating in diagonal sequence.
- Install remaining bearing caps
Tightening torques
Camshaft bearing caps: 15 Nm (11 ft lb)
Camshaft bearing cap positions
Note: Numbers on bearing caps must appear upright when viewed from intake side.
Exhaust camshaft:
- Unbolt intermediate flange and rearmost bearing cap for camshaft position sensor housing.
- Remove bearing cap in front of drive chain, and bearing caps -2- and -3-.
- Gradually loosen bearing caps -1- and -4-, alternating in diagonal sequence.
Intake camshaft:
- Remove bearing cap -6- and -7-.
- Gradually loosen bearing caps -5- and -8-, alternating in diagonal sequence.
Installing
- Install camshafts with drive chain so that markings on sprockets are aligned with each other (arrows)
Notes: When installing the bearing caps, make sure that the stamped numbers appear upright when viewed from the intake side.
The contact surface of both outer bearing caps should be coated lightly with AMV 174 003 01.
Intake camshaft:
- Tighten bearing caps -5- and -8- evenly, alternating in diagonal sequence.
- Install remaining bearing caps.
Exhaust camshaft:
- Tighten bearing caps -1- and -4- evenly, alternating in diagonal sequence.
- Install remaining bearing caps
Tightening torques
Camshaft bearing caps: 15 Nm (11 ft lb)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.