Kubota Cylinder Head Bolt Set for D662–DG972 Engines – OEM Replacement

Product Specifications

Compatible Models

Tired of Cylinder Head Bolt Failure on Kubota D662–DG972 Engines?

Every unscheduled engine shutdown costs operators $1,200–$3,500/day in idle labor, rental fees, and missed deadlines. Counterfeit or low-grade cylinder head bolts stretch under thermal cycling, causing head gasket blowouts, coolant leaks, and catastrophic engine failure. OEM replacements take 3–4 weeks to arrive — halting critical maintenance during peak season.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This 14-piece Kubota cylinder head bolt set delivers consistent clamping force across full operating temperature range (–20°C to +150°C), verified by pre-shipment torque and tensile testing. Built for heavy-duty applications including excavation, agricultural tilling, and generator duty cycles, it replaces 14601-03450 / 14601-03452 / 14601-03453 / 1J080-03450 across Kubota’s D662–DG972 engine family. Backed by 10 years of global export experience and 10,000+ SKUs in stock, we ship verified parts within 2–5 working days.

Where This Part Works

These bolts secure the cylinder head on Kubota engines powering equipment in high-vibration, high-dust environments: construction sites with daily 12-hour operation, quarrying applications with continuous load cycling, port material handlers exposed to salt air, and municipal snow removal fleets operating at sub-zero temperatures. In such conditions, inconsistent bolt yield strength or thread integrity directly compromises combustion chamber sealing — making precision-engineered fasteners non-negotiable.

Engineering Details That Matter

Each bolt is forged from SCM435 alloy steel, quenched and tempered to 10.9 tensile class (minimum tensile strength 1000 MPa, yield strength ≥ 900 MPa). Threads are rolled after heat treatment — preserving grain flow and increasing fatigue resistance by 30% vs cut threads. Surface finish meets ISO 4042 with black oxide coating (≥ 48hr salt spray resistance) to prevent galvanic corrosion when mated with aluminum cylinder heads. Dimensional tolerance is held to ±0.05 mm on shank diameter and pitch diameter — ensuring full interchangeability with OEM assemblies without reaming or modification.

The Real Cost of Wrong Parts

A $2.50 counterfeit bolt may save $15 upfront — but causes $2,800 in labor to replace a blown head gasket, $1,100 for coolant system flush, and $4,200 in downtime for a single-day delay on a municipal road repair contract. Our Kubota D662–DG972 cylinder head bolt kit complies with ISO 898-1 and meets Kubota’s original torque specification (78–82 N·m dry, no lubricant). Total cost of ownership drops 41% over 3 years compared to repeated failures from substandard fasteners — verified across 2,300+ field installations since 2022.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in static-resistant polybags with printed OEM part numbers; packed in double-walled corrugated box with molded EPS foam inserts
• In-stock items shipped within 2–5 working days after order confirmation
• Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — selected per customer requirement
• Real-time tracking provided from warehouse dispatch to final delivery
• MOQ: 1 piece — supporting emergency field repairs and small workshops

Get Your Kubota Cylinder Head Bolt Set Now

Your excavator or tractor isn’t generating revenue while waiting for parts. Send us your machine model (e.g., Kubota U15 or BX2370) and quantity — we’ll reply with a formal quote within 24 hours. First-time buyers can request a sample for physical verification before bulk ordering. Stock is available today; your order ships tomorrow.

Frequently Asked Questions