The LS-8707 (ATC-8707) thread insert repairs stripped or damaged head bolt holes in Detroit Diesel 60 Series (DD13, DD15, DD16) engine blocks—M16 × 2.00 internal × 13/16"-16 external threads, 2.50" length—restores strong, aligned bolt engagement without block replacement or major machining.

The High Costs of Ignoring Stripped Head Bolt Holes in Detroit 60 Series Engines

Stripped M16 head bolt threads force expensive solutions: oversized bolts (risky alignment), heli-coil attempts (often fail under torque), extensive deck machining, or complete block replacement—resulting in head lift, gasket leaks, or full engine downtime.

• Heli-coil / thread chase failure – $700–$2,800 rework
• Head gasket / alignment failure – $2,500–$7,000 repeat service
• Cylinder head removal & rework – $4,000–$10,000 labor & parts
• Engine block replacement – $12,000–$25,000+ short/long block
• Truck downtime & lost revenue – 8–35 days ($800–$3,000/day fleet loss)
• Rework & warranty claims — Extra 50–130 hours at $150–$350/hr

What is the LS-8707 Thread Insert?

The LS-8707 / ATC-8707 Detroit Diesel 60 Series Bolt Hole Thread Insert is a high-strength repair insert with M16 × 2.00 internal threads and 13/16"-16 external threads, 2.50" overall length—designed specifically to salvage stripped head bolt holes in DD13, DD15, DD16 engine blocks.

Ideal for Detroit Diesel rebuilders, heavy-duty shops, and fleet maintenance, it provides deep engagement, accepts standard M16 bolts, and is compatible with M20111-DD fixtures & common thread repair kits (Kent-Moore, Porta-Tool, Detroit)—turning potential $12K–$25K losses into profitable repairs.

Complete Insert Specifications & Detroit 60 Compatibility

Professional Features & Engine Block Benefits

Economic Impact: LS-8707 ROI for Shops

Scenario	Cost Impact
LS-8707 insert repair	$56.00 (single) – $32.48 (bulk)
Heli-coil / thread chase failure	$700–$2,800
Head & gasket rework	$4,000–$10,000
Engine block replacement	$12,000–$25,000
Total stripped hole cost	$16,700–$37,800 per engine
LS-8707 ROI (first repair)	298–675X return on investment

When Detroit 60 Techs & Rebuilders Choose LS-8707

• Detroit Diesel 60 Series (DD13/DD15/DD16) stripped head bolt holes
• DD60 engine block salvage & overhaul
• Detroit 60 head gasket & top-end repair
• Heavy-duty diesel rebuild facilities
• Fleet maintenance on DD60-powered trucks
• M16 head bolt thread restoration jobs
• Cost-effective block thread repair

Why Detroit 60 Specialists Trust LS-8707

Detroit 60 Series rebuilders rely on the LS-8707 for its deep 2.50" engagement, precise M16 × 2.00 internal threads, and proven ability to salvage blocks that would otherwise cost $16K–$38K to replace. It restores factory-level strength and keeps engines profitable.

From long-haul fleets to reman shops, this insert turns damaged blocks into high-margin repairs.

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