Installing a DOD delete kit on a C8 Corvette means removing the valley cover, swapping in delete plugs with blue Loctite, and torquing every fastener to spec.
Displacement on Demand — also called Active Fuel Management — lets your C8 Corvette run on four cylinders during light driving. For many owners, that cylinder switching adds unwanted complexity: uneven oil consumption, occasional drivability changes, and long-term concerns about AFM-related valvetrain wear. The Lingenfelter DOD delete kit replaces the active hardware with solid plugs, turning the system off permanently. This guide covers how to install a DOD delete kit on the C8 Corvette using the exact steps from the official manual — what comes off, what goes in, and which torque values are critical. If you are still choosing a kit, our tested roundup of the best DOD delete kits can help you pick the right one for your build.
What the DOD Delete Kit Replaces
The Lingenfelter kit targets the four DOD actuators and their supporting hardware tucked under the valley cover on the C8 Corvette engine. Those actuators normally disable lifters on four cylinders to reduce displacement during light throttle. The delete kit replaces them with four mechanical plugs that keep oil passages sealed and valvetrain operation constant — no switching, no AFM-related oil consumption, and no risk of collapsed lifters down the road. The kit is specific to the C8 Corvette; other GM platforms use different bolt patterns and clearances and require their own manual.
Installing the DOD Delete Kit Step by Step
Work in a clean bay with the engine fully cool. Have a 13 mm, 10 mm, and 8 mm socket ready, plus blue Loctite and 600-grit sandpaper or a deburring tool.
1. Remove the high-pressure fuel pump. Use a 13 mm socket on the two pump bolts and lift the pump straight out of the valley. Set it aside on a clean surface.
2. Remove the valley cover. The cover is held by nine bolts — all 13 mm. Remove them and lift off the cover. You will see the four DOD actuators beneath the black plastic harness body.
3. Disconnect and remove the harness body. Unplug the four electrical connectors from each DOD valve. A 10 mm socket removes the harness body. Lift it out of the valley.
4. Remove the DOD actuators. Each actuator is secured by one bolt — use an 8 mm socket for all four. Pull the actuators straight out of the block.
5. Install the delete plugs. Lubricate the preinstalled O-rings on all four delete plugs, then press each one firmly into the empty actuator socket. Reuse the OEM actuator bolts — the kit includes four washers that fit onto them. Apply blue Loctite to the threads of all four bolts, then install and torque to exactly 89 lb-in.
6. Prepare the valley cover for reinstallation. Deburr the top of the cover where the harness originally passed through using 600-grit sandpaper or a deburring tool. This step is not optional — a sharp edge can cut the new seal. Remove the orange O-ring from the OEM harness connector and transfer it to the new valley-cover plug. Press the plug into the cover from the top down and secure it with the included C clip.
7. Reinstall the valley cover. Set the cover in place, install the nine bolts, and torque them to 25 Nm (18 lb-ft) following the sequence in the manual.
8. Reinstall the high-pressure fuel pump. Hand tighten the two pump bolts one turn at a time until the pump is fully seated, then torque both to 25 Nm (18 lb-ft).
Critical Torque Specs and Safety Notes
All torque values below come directly from the Lingenfelter manual and must be followed exactly to avoid seal damage or fastener failure.
| Fastener | Torque Value | Critical Details |
|---|---|---|
| DOD delete plug bolts (4) | 89 lb-in | Use OEM bolts with kit washers; apply blue Loctite |
| Valley cover bolts (9) | 25 Nm (18 lb-ft) | Follow torque sequence from the manual |
| Fuel pump bolts (2) | 25 Nm (18 lb-ft) | Hand tighten evenly first, then torque |
Two warnings from the manual deserve repeating: skip the deburring step and a sharp edge on the valley cover can cut the new O-ring, causing an oil leak. Use only blue Loctite — thread locker that is too strong can make future service difficult, and no thread locker risks bolts backing out under vibration.
FAQs
Can I use this procedure on a Silverado or other GM truck?
The Lingenfelter kit and manual are specific to the C8 Corvette. While the general DOD delete concept is the same across GM platforms, bolt patterns, fastener sizes, and clearances differ. Use a platform-specific manual for any other vehicle.
What happens if I skip the deburring step?
A sharp edge left on the valley cover can cut the O-ring on the new valley-cover plug, leading to an oil leak at the valley cover and potential engine damage. The manual is explicit that this step is critical and not optional.
Do I need a tune after installing the DOD delete kit?
Yes. The kit mechanically disables the hardware, but the engine control module still expects the DOD system to be active. A professional tune is required to disable DOD in the software and prevent check-engine lights or drivability issues.
References & Sources
- Lingenfelter Performance. “C8 Corvette DOD Delete Kit Installation Manual.” Official step-by-step instructions, torque specs, and safety notes for the Lingenfelter DOD delete kit on the C8 Corvette.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
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