5332597 +0.5 Oversize Piston For Cummi ns ISB3.9 ISBE QSB5.9 Diesel Engine

• OEM Part Number: 5332597 (+0.5 / +0.50mm Oversize)
• Alternative Cross Part: 5405793, 5273438
• Oversize Specification: Cylinder bore diameter increased by 0.5mm repair size
• Applicable Engines: Cumm ins ISB3.9, ISBE, ISBE4, QSB5.9, 4B3.9, 6B5.9 B-series diesel engines
• Application: Light commercial trucks, buses, construction machinery, agricultural equipment with Cumm ins B series engines
• Material: High-strength cast aluminum alloy, internal cooling gallery design
• Structure: 3 ring grooves, combustion bowl with FRONT installation marking, piston pin bore integrated
• Core Function: Convert fuel combustion pressure into mechanical power, match rebored cylinder liner for engine overhaul repair

1. Standard +0.5mm oversize repair dimension, perfectly matches cylinder block after boring and honing, solves cylinder excessive wear and cylinder taper out-of-round problem.
2. Forged aluminum alloy with heat treatment, good high temperature resistance and wear resistance, reduces piston ablation and skirt scuffing risk under heavy load.
3. Precision CNC machined ring grooves guarantee piston ring tight sealing, lower engine oil consumption and blow-by gas.
4. Clear FRONT directional mark on piston top, avoid wrong installation direction during engine assembly.

5332597 is a +0.5mm oversize repair piston specially designed for Cumm ins B series 3.9L / 5.9L diesel engines. When the original cylinder bore is severely worn, the cylinder block will be bored 0.5mm larger, this oversize piston together with matched oversize piston rings are used for engine full overhaul restoration. The piston adopts internal oil cooling cavity structure to control working temperature effectively, maintain stable clearance between piston and cylinder wall, improve engine compression ratio, restore original power performance and reduce exhaust blue smoke fault caused by oil burning. Each piston undergoes dimensional inspection and balance test before delivery.

We supply parts for Kubota, Cum mins, CAT, Perkins, Yanmar, Isuzu, Komatsu, Mitsubishi, Hino, Nissan, Vo lvo, Deutz, Doosan, Daewoo, John Dee re, Scania, Hyundai, JCB etc.

A: It means the piston outer diameter is 0.5 mm larger than the standard stock size, used for repairing worn cylinder bores that have been rebored 0.5mm oversized.

A: Mainly fits Cumm ins ISB3.9, ISBE, QSB5.9, 4B3.9, 6B5.9 B series mechanical and electronic common rail diesel engines.

A: Must install matching +0.5 oversize piston rings, also replace cylinder liner, piston pin, circlips, connecting rod bearing and crankshaft bearing during overhaul for full reliability.

A: Follow the "FRONT" arrow marking on piston crown to face engine timing gear side, apply proper engine assembly lube on piston skirt and pin bore before pressing piston pin.