Jetuplusllc AFM/DOD Oil Block Off Plugs Set of 8 — Fits Gen IV & Gen V, Reversible Press-Fit Seal

These Jetuplusllc AFM/DOD oil block off plugs (set of 8) seal the AFM oil galleys on original DOD/AFM valley covers for Gen IV (2005–2018) and Gen V (2014–current) Chevy/GM engines.

When converting DOD/AFM lifters to conventional LS/LS7 style lifters or when you need to isolate oil passages, these eight precision plugs provide a straightforward, reversible way to block the valley cover oil feed. They are manufactured to fit the factory DOD/AFM valley cover only and install by tapping into the oil galley holes until the plug sits flush with the plug lip. Removal is possible by tapping the top to back the plug out using the 4mm x 0.7 thread engagement.

Will these plugs fit my engine and valley cover?

These plugs are engineered for use with factory DOD/AFM valley covers on Gen IV (2005–2018) and Gen V (2014–present) small-block V8s from Chevy/GM, Oldsmobile and Cadillac. They will not seat correctly in non-DOD or aftermarket valley covers, so confirm you have the original-style cover before purchasing.

• Compatible with factory DOD/AFM valley covers only
• Fits Gen IV (2005–2018) and Gen V (2014–current) applications
• Not for aftermarket or non-DOD valley covers
• Commonly used with LS/LS7 lifter conversions

How do I install and remove these oil block plugs?

Installation requires gently tapping each plug into the oil galley hole until the plug is flush with the bottom lip. Removal is also simple: tap the top of the plug to back it out via the built-in thread interface, making the process reversible without damaging the valley cover.

• Install by slightly tapping into oil galley holes
• Seat until flush with plug bottom lip
• Remove by tapping top; 4mm x 0.7 thread engagement for extraction
• Do not overtighten—press-fit style installation is intended

What are common uses and limitations of these plugs?

Technicians and builders often use these plugs when disabling AFM/DOD oil supply paths during lifter conversions, block off unused galleys in rebuilds, or prevent oil flow into deactivated AFM systems. They are not a universal plug—using them on the wrong valley cover can lead to improper sealing.

• Used for AFM/DOD lifter-to-traditional lifter conversions
• Blocks oil galleys under the VLOM plate
• Set contains eight plugs to cover standard valley configurations
• Not compatible with aftermarket or non-DOD valley covers

What should I check before ordering this set?

Verify your vehicle’s engine generation and that the valley cover is the original DOD/AFM style. Confirm you need eight plugs for the application and that you or your mechanic are comfortable with light tapping for installation and extraction.

• Confirm engine generation (Gen IV or Gen V) and year range
• Ensure valley cover is original DOD/AFM type, not aftermarket
• Plan for simple tapping install and threaded-method removal
• Order quantity: eight plugs per set (AJ361-8)

Who is this for: Gearheads, engine builders, and professional mechanics converting DOD/AFM lifter systems to traditional LS/LS7-style lifters or sealing AFM oil passages on factory valley covers. If you have a non-DOD or aftermarket valley cover, choose a different plug solution; if you work with original DOD/AFM valley covers on 2005–2019 Chevy/GM V8s, this set is tailored for your needs.