JASPER upgrades Chrysler 3.6L Pentastar engines with improved parts such as nitrided valves, copper-infiltrated valve seats, and JASPER designed pistons with robust rings for increased durability.

JASPER 100% replaces the early-style cylinder head valve seats with copper-infiltrated seats to improve heat dissipation and reduce wear.

JASPER provides 100% installation of a NEW engine oil cooler and includes: oil temperature sensor, oil pressure sensor, knock sensor and adapter harness.

• 100% installation of NEW late-design rockers/cam followers, improving longevity of the bearing assembly in the rocker.

• 100% replacement of early-style cylinder head valve seats with copper infiltrated seats for improved heat dissipation and reduced wear.

• 100% installation of NEW nitrided valves for improved heat resistance and reduced valve guide wear.

• 100% installation of high-strength, Class 12.9 rod bolts to eliminate stretching, which can lead to bearing failure.

• JASPER-designed piston with graphite coating helps prevent dry start-up and piston scuffing.

• JASPER-designed pistons include 28% more major thrust bearing area to prevent dry start-up and piston scuffing.

• Stronger JASPER-engineered pistons have a smooth, fully-machined, anodized crown that provides a thermal barrier and reduces carbon buildup.

• JASPER’s piston design includes additional oil return holes (12 total) for increased oil drain back, to reduce oil consumption and prevent the oil rings from sticking.

• JASPER installs a robust, two-piece 2.0mm oil ring for improved oil control.

• JASPER piston rings include a steel top ring that has a PVD and DLC coating for longevity and less friction.

• Additional accumulator groove is machined into the piston to decrease the pressure between the first and second ring land, preventing the upper (compression) ring from unseating at higher RPMs.

• 100% installation of synthetic, rubber-based PTFE (polytetrafluoroethylene) valve stem seals.

• 100% torque plate honing of engine block, utilizing a torque plate and specially-designed, ARP2000® bolts, provides cylinder wall geometry that matches the cylinder head as a complete running assembly, for improved ring sealing.
• JASPER-designed pistons include 20% more pin bearing area for better stability.

• Installation of JASPER-designed pins in the block, which lock the cylinders together under heavy load. This prevents the cylinders from moving, which can lead to head gasket scuffing, a common cause of failure.
• Block is CNC machined for 100% installation of steel threaded inserts for head bolts, increasing strength over the original aluminum design that pull out.
• Upgraded D-shaped head gaskets increase fire ring pressure for improved sealing under heavy use.
• JASPER installs a thicker, PTFE (polytetrafluoroethylene) coated MLS (Multilayer steel) head gasket.
• Block and heads are resurfaced to a 50–150 Rz finish.

• 100% installation of NEW engine oil cooler, and for ease of installation, assembly includes: oil temperature sensor, oil pressure sensor, knock sensor, and adapter harness.

• 100% of the Chrysler 3.6L remanufactured oil pumps are tested on state-of-the-art, JASPER designed, stand-alone oil pump testing equipment. Oil pressure and flow are measured with solenoid on and off throughout a full RPM sweep of the remanufacture oil pump operating range.

• VVT’s are hydraulically tested using a state-of-the-art oil-controlled, test stand.

• 100% live-run tested to verify proper compression, vacuum, and oil pressure.
• 100% tested intake and exhaust cam actuators to verify proper performance.
• 100% black light leak tested to ensure the unit is leak-free.