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OEM Replacement

OEM Replacement Total Seal Gapless Piston Rings For Porsche Engines

Total Seal Gapless piston ringsets are now available to fit most original equipment OEM Kolbenschmidt and Mahle piston and cylinder sets on aircooled Porsche engines. Total Seal’s patented Gapless® Piston rings provide increased performance through unmatched sealing of the cylinder and combustion gasses in the combustion chamber. Increased horsepower and torque along with longer engine life are just a couple of the reasons why Total Seal’s Gapless® Piston rings are the best rings.


Replacement Piston Ring Sets for Porsche Engine Rebuilds

Nikasil bores commonly found in Porsche engines require special piston rings for proper function including the use of low tension piston rings. Hard chrome rings and standard or high tension rings used with cast iron bores aren't compatible with Nikasil cylinders. As a result, oil consumption in engines with Nikasil bores, especially in a horizontally opposed engine, has been historically higher than in other engines. Increased consumption can be attributed to the lack of gravity to assist with removal of oil from the bores, use of piston squirters providing added oil volume in the cylinders, and reduced oil control ring tensions less than 10 lbs, compared to 20-24 lbs of tension found on standard oil controls.

The second piston ring is often called the second oil control whose function has been measured to be 85-90% oil control vs 5-10% compression. The use of gapless second rings help reduce oil consumption and smoking at startup common on horizontally opposed Porsche engines by improving the second ring's oil control functionality.

LN Engineering's exclusive Total Seal Piston Rings are optimized for use with Nikasil plated bores and feature OD lapped second rings, ensuring that the second piston ring is light tight. For those of you who do not know what OD lapping is or what it does, top piston rings are always OD lapped. This ensures the ring is round and "light tight", ensuring proper ring seal.

Typically second piston rings out of the box are not OD lapped, requiring the engine builder to "light check" the rings to ensure they will seal. Engines that burn more oil or take longer for the rings to seal up often can be attributed to rings that aren't light tight.

Before ordering replacement piston rings for your Porsche engine rebuild, please measure your piston ring groove diameters to ensure that the rings you are ordering are correct for your pistons. There are no returns or exchanges on Total Seal piston ring sets. If you do not see rings listed for your engine or your pistons, custom Total Seal ringsets can be special ordered through LN Engineering for your Porsche engine.

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