Cracked cylinder heads in Subaru EJ253 engines are a common and frustrating issue, especially when caused by something as simple as an overtightened oil pressure sensor. If you’re one of the many Subaru owners who have encountered this exact failure, you already know how expensive and time-consuming the fix can be.
The good news? You don’t need to pull the engine, strip the head, or spend thousands at a machine shop.
Our Subaru Oil Pressure Repair Kit is designed to permanently fix this issue in your driveway, with tools, instructions, and inserts that get the job done fast and right the first time.
Why Subaru EJ253 Engines Are Prone To This Problem
The EJ253 engine, commonly found in models like the Subaru Impreza, Outback, and Forester, is known for reliability. However, one weak spot lies in the threads that hold the oil pressure sensor or sender. These threads are tapped directly into the aluminum cylinder head, which can easily crack if the sensor is overtightened or cross-threaded.
Once cracked, the head is compromised. You may lose oil pressure readings, develop leaks, or trigger engine warning lights. Worse yet, some mechanics will quote full head removal or replacement to fix it, a costly and unnecessary repair.
Our Solution: The Subaru Oil Pressure Sensor Repair Kit
Our Subaru Oil Pressure Repair Kit was developed for Subaru enthusiasts, mechanics, and DIYers who want a permanent fix without removing the head from the car. The kit is fully compatible with Subaru EJ253 engines, which are used in thousands of vehicles across North America.
It includes everything needed to restore the integrity of the sensor port and keep your oil pressure readings accurate and leak-free.
What’s Included In The Kit?
Each kit contains high-quality tools and components needed to complete the repair in a few hours:
- Oil Pressure Repair Insert (custom machined)
- Drill
- Drill Stop (prevents over-drilling into the cylinder head)
- Tap (to create new threads for the insert)
- Detailed step-by-step instructions with colour photos
Whether you’re a hobbyist or a technician, this kit empowers you to fix your cylinder head confidently and correctly.
How The Repair Process Works
The repair process is designed to be straightforward and effective, using simple hand tools and basic mechanical skills.
Passenger Side Cylinder Head
If the crack is on the passenger side of the engine, the repair is relatively simple. You’ll only need:
- Basic hand tools
- Drill (included)
- Tap handle
- Extension
- Thread sealant
Following the instructions, you’ll drill out the damaged threads, re-tap the hole, and insert the new pressure-safe insert. This ensures a perfect fit for your sensor and restores function to OEM standards.
Driver Side Cylinder Head
This side is more involved, but still doable for mechanically inclined Subaru owners. Because the timing system sits in front of the driver-side cylinder head, you’ll need to remove:
- Timing belt
- Tensioner
- Cam gear
You’ll also need good mechanical knowledge or a qualified helper, but the results are the same: no more cracked heads and no more faulty pressure readings.
Important Fitment Notes
- This kit is only compatible with Subaru EJ253 engines
- Due to the precision nature of this repair, kits are final sale
- Returns are not accepted, so please ensure compatibility before ordering
- If you’re unsure, reach out to our team to verify fitment
About Us
At Specialised Parts, we manufacture purpose-built auto parts designed for Subaru-powered builds and Volkswagen drivetrain conversions. We focus on high-performance, problem-solving components that are trusted by both hobbyists and professional builders across North America.
Our products are engineered with real-world compatibility and reliability in mind, no gimmicks, no shortcuts. Whether you’re restoring oil pressure in a Subaru engine or building a Vanagon with a reversed transmission setup, we’ve got you covered.
Have questions about this kit? Reach out to our team through our website. We’re here to help.
Frequently Asked Questions
Can I Do The Repair Myself Without Removing The Engine?
Yes. The kit allows you to fix the cracked sensor threads without pulling the head or engine. Most users can complete the repair in an afternoon.
What Tools Do I Need For The Install?
The kit includes a drill, tap, and insert. You’ll need hand tools, sealant, and a tap handle. The driver-side repair requires timing component removal.
What If I’m Not Sure I Need This Repair Kit?
If your oil pressure sensor threads are stripped or leaking, this kit is the fastest and most cost-effective way to restore a reliable seal.
