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MK1 Motorsport Toyota & Lexus 1UZ / 2UZ / 3UZ Rear Main Seal Installer

Original price $25.00 - Original price $30.00
Original price
$25.00
$25.00 - $30.00
Current price $25.00

The MK1 Motorsport 1UZ / 2UZ / 3UZ Rear Main Seal Installer is a purpose-built service tool designed to make rear crankshaft seal installation on Toyota UZ engines more controlled and repeatable. Designed for Toyota enthusiasts, mechanics, and engine builders, the tool helps evenly seat the rear main seal after accessing the rear of the crankshaft.

Manufactured using FDM 3D printing from high-infill ASA plastic, the installer is designed for repeated workshop use. It supports Toyota 1UZ, 2UZ, and 3UZ engine applications and can be used with the flywheel bolts or carefully driven into position using a rubber mallet.

Designed for Toyota UZ Engines: Purpose-built for rear main seal installation on compatible 1UZ, 2UZ, and 3UZ engines.

Controlled Seal Installation: Helps seat the rear main crankshaft seal in a simple and repeatable manner.

Two Installation Methods: Can be installed using compatible flywheel bolts or carefully seated using a rubber mallet.

Designed Installation Depth: The tool is designed to bottom against the flywheel end of the crankshaft during installation.

Simulated Flywheel Thickness: Designed to simulate approximately 12 mm of flywheel thickness during the installation process.

High-Infill ASA Construction: FDM 3D printed from high-infill ASA plastic for durability and repeated workshop use.

Designed & Fabricated in the USA: All components are designed and fabricated in the United States.

What's Included

  • (1) MK1 Motorsport 1UZ / 2UZ / 3UZ Rear Main Seal Installer

Vehicle Fitment

  • Toyota 1UZ engine applications
  • Toyota 2UZ engine applications
  • Toyota 3UZ engine applications
  • Compatible Toyota and Lexus vehicles equipped with applicable UZ engines
  • Compatible engine swap and standalone engine applications using an applicable 1UZ, 2UZ, or 3UZ engine

Specifications

  • Brand: MK1 Motorsport
  • Product Type: Rear Main Seal Installer
  • Engine Family: Toyota UZ
  • Engine Compatibility: 1UZ / 2UZ / 3UZ
  • Material: ASA Plastic
  • Construction: High-Infill
  • Manufacturing Process: FDM 3D Printed
  • Simulated Flywheel Thickness: Approximately 12 mm
  • Maximum Recommended Installation Torque: Less than 14 ft-lbs
  • Maximum Bolt Thread Length: 28 mm
  • Design & Fabrication Location: USA
  • Intended Use: Rear Main Crankshaft Seal Installation

Installation Method 1: Recommended

  1. Lubricate the inner lip of the rear main seal.
  2. Position the seal at the rear main seal housing.
  3. Place the MK1 Motorsport Rear Main Seal Installer over the seal.
  4. Insert compatible flywheel bolts through the installer.
  5. Carefully and evenly tighten the bolts to begin seating the seal.
  6. Continue until the installer bottoms against the flywheel end of the crankshaft.
  7. Do not over-tighten the installer. MK1 Motorsport recommends less than 14 ft-lbs. A firm fit is all that is required.

Installation Method 2

  1. Position the rear main seal at the rear main seal housing.
  2. Place the installer over the seal and lightly press it into position by hand.
  3. Use a rubber mallet to lightly and evenly tap the installer.
  4. Continue until the installer bottoms against the flywheel end of the crankshaft.

Important Notes

  • Please allow approximately 1–2 weeks for production before shipment due to high demand.
  • Rear main seal is not included.
  • The installer is designed to simulate approximately 12 mm of flywheel thickness.
  • MK1 Motorsport recommends beginning with Method 2 when using a stock flywheel bolt with an automatic transmission or shortened ARP bolts used with certain twin-disc flywheel configurations.
  • Do not exceed the manufacturer's recommended installation torque of less than 14 ft-lbs when using Method 1.
  • Do not use a bolt with a thread length greater than 28 mm. Excessive bolt length could damage engine components.
  • The stated torque limit applies to use of the seal installer and is not a final flywheel bolt torque specification.
  • Use a rubber or other appropriate non-marring mallet when following Method 2.
  • Keep the seal properly centered during installation to reduce the risk of damaging or improperly seating it.
  • Inspect the installer for cracks, deformation, or other damage before each use.
  • Refer to the appropriate Toyota service information for engine disassembly, reassembly, and final fastener torque specifications.

Why Choose MK1 Motorsport?

The MK1 Motorsport 1UZ / 2UZ / 3UZ Rear Main Seal Installer provides an application-specific alternative to improvised seal installation methods. Its design allows the rear main seal to be seated consistently while servicing Toyota UZ engines.

With compatibility across 1UZ, 2UZ, and 3UZ applications, high-infill ASA construction, and two supported installation methods, it is a practical reusable service tool for Toyota and Lexus enthusiasts, mechanics, and engine builders.

Color: Black

About Us

We are passionate Lexus and Toyota enthusiasts dedicated to providing the highest quality aftermarket parts to enhance your ride. Our goal is to help you find the perfect performance upgrade, whether you're building your dream car or just adding that next improvement. We take pride in offering products that we trust for our own vehicles.

Shipping

Shipping times vary based on item availability and specific lead times. You can expect an email with an estimated shipping date within 1-3 days of placing your order. Many in-stock parts ship within 2-5 business days, while certain built-to-order items may take up to 7-10 business days. For back-ordered items, availability may vary, but we will email you with any ETA changes.

Once your items are ready to ship, we will send tracking information via email so you can easily follow your package from our warehouse to your door. Please note, some parts may be shipped separately and could arrive at different times. Shipping costs apply to the lower 48 states, unless stated otherwise, and international orders may be subject to additional customs or duties fees.

What to Expect Upon Delivery

Upon receiving your order, please inspect the items immediately for any damage or missing parts. Verify all items against the packing slip or instructions before starting installation. We cannot be held responsible for costs incurred from delays due to missing items.

If any items are damaged or missing, please get in touch with us within 14 days of receipt so we can assist with a replacement. Claims made after this period will not be honored.

Cancellation Policy

If you need to cancel or modify your order, please contact us as soon as possible. We strive to ship your order quickly, and once processing begins, cancellations may be subject to a restocking fee. Orders canceled within 24 hours of purchase may not incur a fee, but after that time, restocking fees (typically 20%) will apply depending on the items and the stage of fulfillment.

Return Policy

Customer satisfaction is our priority, and we are happy to assist with returns. However, due to the complexity of sourcing and delivering our products, returns are subject to a restocking fee (usually 20%) based on the item and manufacturer.

Before returning any items, please get in touch with us to receive a return authorization. All return requests must be made within 30 days of receiving your merchandise. Once approved, items must be returned within 14 days in their original condition. Improper packaging of returned items may result in customer responsibility for damages.

Customers are responsible for return shipping costs, unless the item is defective or we shipped the wrong item. A trackable shipping method is strongly recommended.

Warranty

We honor all manufacturer warranties and are here to support you in getting the quality products you deserve. However, please note that warranty claims are available to the original purchaser only. In certain situations, manufacturers may handle warranty claims directly, and we are unable to cover costs not specified in the manufacturer's warranty (e.g., shipping, labor). If you have any questions, feel free to reach out to us.

Emissions Notes

All parts and services offered by LunaticsCo are for competition vehicles only. Use on state and federal highways may be a violation of the EPA Clean Air Act. The Clean Air Act can be found at http://www.epa.gov/air/caa/. This document details what are considered violations of the CAA and the corresponding penalties for failure to comply. It should be read in full before purchasing or installing this competition-use-only product. Ensuring that all emissions, noise/sound, and speed/use-related laws are followed is the responsibility of the buyer(s). Installation and use of this product indicate that this disclaimer has been read, acknowledged, and fully understood by both the buyer(s) and installer(s). The buyer(s) assume all associated risks of purchase.

Federal and several state laws prohibit the removal, modification, or rendering inoperative of any part that affects emissions or safety on motor vehicles used on public streets or highways. LunaticsCo assumes no liability for any violations arising out of any federal, state, or provincial emissions or safety requirements on motor vehicles resulting from the customer’s modifications and/or use of LunaticsCo products. It is the responsibility of the customer to determine if their modified vehicle complies with applicable laws.