Jul 31th, 2025

• Is my Porsche engine susceptible to bore scoring?
• Don't forget: IMS bearing service intervals.
• Free Webinar: IMS Myths, Facts and Fixes

Bore scoring has become a well-known Achilles’ heel in certain generations of Porsche engines, particularly those utilizing Lokasil and Alusil high-silicon aluminum block technologies. These early lightweight designs offered performance advantages over traditional cast iron liners but came at the cost of long-term durability—especially when paired with suboptimal maintenance or piston design flaws. The result? Thousands of premature engine failures due to deep gouges in the cylinder walls.

Customers are always asking about what Porsche models don’t suffer from scoring. We’ve made a guide that explains all the newest models through 2025 and what cylinder technology Porsche is currently using in them.

If your ball or roller IMS bearing is more than 6 years old or has more than 75,000 miles, whichever comes first, it’s time to replace your IMS bearing. Even if you aren’t anywhere near the 75k miles, remember, the IMS bearing is in service 24/7, has a load on it all the time and is exposed to contaminated engine oil. The worst thing you can do is not drive your Porsche! The only truly permanent fix for the IMS bearing problem is the IMS Solution. Take advantage of our trade-up rebate to save up to $300 on your IMS bearing replacement, and as always, LN Engineering offers free IMS and RMS tool rental.

You can look up your VIN or IMS kit Serial number

in our online database.

Bought a car with our product installed ?

Get detailed information about your installed IMS Retrofit or IMS Solution bearing upgrade kit, including installation date / mileage and service intervals.

Buying a car?

Check if the car you’re about to purchase has its Intermediate Shaft Bearing already upgraded to an IMS Retrofit or IMS Solution bearing kit.

Selling your car?

A registered IMS upgrade documented in our database makes for a great selling point. Make sure your IMS upgrade kit is properly registered after installation.

Join Charles Navarro (LN Engineering), Jake Raby (IMS Solution Inventor), and Tony Callas (Callas Rennsport) on Wednesday, Aug 20th 2025 at 8PM Eastern Time for an exclusive live webinar on the Porsche M96/ M97 Intermediate Shaft (IMS) bearing. This is your chance to learn directly from the experts who’ve led the charge in IMS bearing diagnosis, repair and prevention with live Q&A- Bring your questions!

Whether you’re a Porsche owner, a shop tech, or just love engine tech, this session will cover real-world insights, failure modes, replacement options, and long-term solutions.