OxyGenie M12×1.5 Double-Oversize Magnetic Piggyback Oil Drain Plug — Stainless Steel Self-Tapping Repair Kit

OxyGenie’s M12*1.5 Double Oversize Magnetic Piggyback Oil Drain Plug is a stainless steel, self-tapping repair kit that permanently restores severely stripped oil pan threads while adding a magnetic particle-collecting drain plug.

If an ordinary oversize plug or a helicoil repair hasn’t held, this kit is built to salvage damaged oil pan threads without replacing the pan. It combines a larger-diameter self-tapping main plug that cuts fresh, deeper threads with a secondary piggyback screw that seals and provides a magnetic tip to capture ferrous debris. The kit includes sealing parts and the tools you need to install the plug and is designed for vehicles specifying M12.2 x 1.5 thread pitch.

How does this double oversize plug repair badly stripped oil pan threads?

The main plug is purposely larger than single-oversize options so it can re-cut new, deeper threads into a worn or over-tapped hole. Its self-tapping design forms a new internal thread pattern that the piggyback screw then uses to achieve a tight mechanical fit, eliminating the looseness that leads to oil leaks.

• Self-tapping main plug cuts fresh threads into the damaged oil pan hole.
• Double-oversize diameter creates a stronger, deeper engagement than single-oversize plugs.
• Designed for M12.2 x 1.5 thread applications to match many common oil pans.

What prevents oil leaks after installation?

This kit uses a dual-seal strategy: a copper crush washer at the flange for a reliable metal-to-metal seal plus an O-ring on the piggyback screw as a secondary flexible barrier. Together they significantly reduce the likelihood of seepage even under vibration and thermal cycling.

• Copper crush washer forms the primary, conforming metal seal at the drain face.
• Integrated O-ring on the piggyback screw provides a secondary elastomeric seal.
• Extra fluorine O-rings and copper gaskets are included for replacements.

How does the magnetic piggyback plug help engine longevity?

The removable piggyback screw houses a strong magnet that attracts ferrous metal particles traveling in the oil. By trapping small metallic debris in the drain area, the magnet helps limit abrasive contamination in circulation between oil changes.

• Magnet captures steel and iron particles before they re-enter the oil system.
• Removable piggyback screw allows easy inspection and cleaning during oil changes.
• Stainless steel construction resists corrosion while in contact with oil and wash fluids.

How simple is installation, and what tools come with the kit?

Installation follows a few straightforward steps: clean the area, hand-start the main plug to ensure alignment, tighten to specified torque, and fit the piggyback screw. The kit ships with a hex L-wrench for the piggyback screw and spare sealing components so you can finish the job without special equipment.

• Includes L-shaped hex key and spare fluorine O-rings and copper gaskets.
• Recommended tightening torque for the main plug is about 14 ft-lbf.
• Stepwise process avoids complex tapping tools or perfect perpendicular alignment.

Who is this for: This OxyGenie M12*1.5 double oversize piggyback drain plug kit is intended for mechanics, DIY enthusiasts, fleet maintainers, and anyone facing severely stripped or previously over-tapped oil pan threads. It’s particularly useful when you want a durable repair without welding or replacing the oil pan, and for vehicles that accept an M12.2 x 1.5 drain plug. Note: follow vehicle manufacturer guidance for drain plug size and torque, and ensure compatibility before fitting.