M12.1-1.75 x 15mm Oversize Piggyback Oil Drain Plug

The OxyGenie M12.1-1.75 x 15mm Oversize Piggyback Oil Drain Plug is a stainless steel self-tapping repair kit that restores stripped oil pan threads without replacing the pan.

If your oil pan threads are worn, cross-threaded, or stripped, this piggyback-style drain plug offers a fast, durable repair. Machined from 304 stainless steel with CNC precision, the kit re-threads the damaged opening while creating a secure secondary plug that seals reliably. The set includes seals and a hex key so you can finish the job with common shop tools in minutes.

How does this piggyback plug fix a stripped oil pan thread?

The oversized main plug taps new threads into the oil pan while the piggyback plug screws into the main body to hold oil during draining. Because it forms fresh stainless threads and uses replacement o-rings and copper gaskets, it delivers a tight mechanical seal without welding or pan replacement. Installation avoids the alignment challenges of inserts like Helicoil.

• Self-tapping stainless main plug creates new mating threads.
• Piggyback secondary plug provides normal drain function and sealing.
• Includes fluorine o-rings and copper gaskets for leak resistance.
• No need to remove or replace the oil pan in most cases.

What tools and steps are required to install it safely?

Installation needs basic shop tools and a clean workspace. After degreasing the area, you thread the main plug in a few turns forward and back to form threads, clean debris, torque the plug to spec, then fit the piggyback valve and seals. Use a wrench to hold the main plug when removing the smaller piggyback plug for draining.

• Tools included: L-shaped hex key for the piggyback plug; T-socket or wrench recommended for tightening.
• Clean with brake cleaner before and after tapping to remove metal particles.
• Torque main plug to about 14 ft-lb for correct seating.
• Hold the main plug stationary when removing the piggyback drain bolt to prevent loosening.

What materials and parts come in the kit and why they matter?

The kit is built from 304 stainless steel for corrosion resistance and machining strength, paired with replacement sealing components to ensure leak-free performance. The combination of a hardened body and fresh seals reduces the chance of recurrence compared with reusing damaged seals or cheap steel hardware.

• M12.1-1.75 x 15mm stainless steel self-tapping main plug.
• Piggyback drain plug that threads into the main plug for normal oil changes.
• Two fluorine o-rings for the main plug and two red copper gaskets for the piggyback plug.
• L-shaped Allen wrench included for secure installation and removal.

Will this work for my vehicle and what should I check first?

The oversized M12.1-1.75 x 15mm size fits many pans where the original thread is damaged, but verify thread pitch and diameter against your factory drain plug before ordering. Check the oil pan wall thickness and general condition; severely deformed or cracked pans may still require replacement. If unsure, compare the plug dimensions to the factory part or consult a mechanic.

• Confirm existing drain plug size and thread pitch match M12.1-1.75 where applicable.
• Inspect pan for cracks or major deformations that a plug cannot remedy.
• Measure clearance around drain area to ensure piggyback plug can be removed during service.
• Keep recommended torque (~14 ft-lb) to prevent over-stressing repaired threads.

Who is this for: The OxyGenie oversize piggyback drain plug is for DIY mechanics, fleet maintenance techs, and garage shops needing a dependable, low-cost fix for stripped oil pan threads. Choose this kit if you want a corrosion-resistant, reusable repair solution that includes seals and basic tooling to get the job done quickly without replacing the entire oil pan.