Description

When your diesel engine’s losing power, burning oil, or blowing by past the rings, it’s telling you the cylinders and pistons need attention. Hard starting, blue smoke on startup, and higher fuel consumption are all signs those pistons and rings have given up their fight against thousands of hours of hard work. This complete oversize kit brings your 4TA-390 turbo diesel back to factory power without the cost of a complete engine rebuild.

What You’re Getting

Complete set for all four cylinders with pistons, pins, retainers, and ring sets included
1mm oversized pistons designed to restore compression and eliminate blowby
Heavy-duty rings engineered to handle the heat and pressure of turbocharged operation
Quality pins and retainers that secure properly and last through thousands of operating hours
Everything you need for a professional in-frame rebuild in one kit

Built for Turbo Power

The 4TA-390 is a serious workhorse engine found in mid-range tractors that handle everything from heavy tillage and planting to harvest support and loader work. These engines are known for reliability, but they generate serious heat under load, especially when you’re pulling through tough ground or running PTO equipment all day. The turbocharger and aftercooler system demands components that can handle the extra pressure and temperature swings.

Made to Last

The robust construction handles the pressure fluctuations and temperature extremes common in agricultural applications. Materials designed to handle the thermal cycling and high pressures of diesel operation mean this isn’t a quick fix—it’s a long-term solution that gets your tractor back to pulling like it should.

Installation Notes

This is a professional-level rebuild requiring cylinder boring to accommodate the oversize pistons. Always clean the block threads thoroughly – any debris will give false torque readings. While you’re doing the work, it’s a good time to check your cylinder liners and head gasket condition. Clean all mating surfaces thoroughly and use new gaskets with appropriate sealant for a job that’ll last.