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 MANUALSCADILLAC1998SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINESERVICE AND REPAIRENGINE OVERHAUL (UNIT REPAIR)IGNITION MODULE INSTALLATION
1998 Cadillac Seville SLS V8-4.6L VIN Y
Ignition Module Installation
1998 Cadillac Seville SLS V8-4.6L VIN YSECTION Ignition Module Installation
1. Position the ignition module on the right camshaft cover.
2. Install the ignition module retaining bolts.
^ Tighten the ignition module retaining bolts to 12 Nm (106 in. lbs.).
3. If necessary, connect the correct number spark plug wire to its corresponding terminal on the ignition module and spark plug.
4. The right bank wires must be routed as shown to prevent possible misfires.
5. Route the left bank spark plug wires as shown to prevent wire damage.
6. The left bank wires must be secured in the retaining features formed into the intake manifold.
7. Install the intake manifold sight shield with four nuts.
^ Tighten the intake manifold sight shield nuts to 3 Nm (27 in. lbs.).
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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.