The M52052 Lower Bore Boring & Sleeving Tool (PT-3050A) is a professional-grade machine tool for restoring worn lower cylinder bores in diesel engine blocks by precision boring and installing hardened sleeves—returns the bore to true, concentric factory specs for optimal piston/ring performance and extended engine life.

The Massive Costs of Ignoring Worn Lower Bores in Diesel Engines

Tapered, out-of-round, or scored lower bores accelerate liner wear, cause poor ring seal, excessive blow-by, oil consumption, and power loss—often leading to premature engine failure if not corrected during rebuild.

• Continued liner / piston wear – $4,000–$12,000 premature overhaul
• Blow-by & oil consumption – $2,000–$6,000 in fuel & oil waste + emissions fails
• Power loss & downtime – $5,000–$15,000+ lost revenue (truck idle 5–20 days)
• Cracked block or full engine scrap – $15,000–$35,000 replacement engine
• Rework after bad rebuild — Extra 40–100 hours machining & labor at $150–$350/hr
• Warranty & reputation damage — Long-term shop/fleet impact

What is the M52052 Lower Bore Boring & Sleeving Tool?

The M52052 Lower Bore Boring & Sleeving Tool (PT-3050A) is a complete precision machining system for boring worn lower cylinder decks to exact size and installing hardened sleeves in diesel engine blocks.

Engineered for professional diesel machine shops, remanufacturers, and heavy-duty rebuild facilities, it delivers straight, concentric bores with alignment fixtures, enabling sleeve installation for restored geometry and extended block life.

Complete Tool Specifications & Diesel Engine Compatibility

Professional Features & Engine Block Benefits

Economic Impact: M52052 ROI for Machine Shops

Scenario	Cost Impact
M52052 proper restoration	Tool investment – $11,600.00
Premature engine overhaul	$4,000–$12,000
Block scrap / replacement	$15,000–$35,000
Downtime revenue loss	$5,000–$15,000
Total uncorrected bore cost	$24,000–$62,000 per engine
M52052 ROI (first few blocks)	2–5X return on investment (recurring)

When Diesel Machine Shops Choose M52052

• Heavy-duty diesel engine block remanufacturing
• Lower bore repair & sleeve installation
• Cummins, Detroit, Caterpillar, Navistar block service
• Engine rebuild facilities & machine shops
• Fleet reman programs for Class 8 trucks
• Restoring out-of-round / tapered bores
• Preparing blocks for new piston kits

Why Reman Pros Invest in the M52052

Diesel remanufacturers choose the M52052 for its alignment accuracy, repeatable precision boring, and ability to salvage blocks that would otherwise be scrapped—turning potential $24K–$62K losses into profitable rebuilds. It’s the tool for high-volume, high-margin engine work.

From heavy truck reman to industrial engine shops, this system keeps blocks in service and businesses thriving.

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