The M30145 Counterbore Top Deck Sleeve Tool is a precision specialty tool engineered for professional restoration of the top-deck counterbores on Detroit Diesel 60 Series engine blocks (including 11.1 L, 12.7 L, and 14 L platforms). PT-2090 conversion kit, this tool provides a reliable means to machine worn or out-of-spec counterbore surfaces to accept repair sleeves/bushings—a critical step when top deck liner seats have deteriorated from service wear, corrosion, or repeated rebuilds.
Detroit Diesel 60 Series engines can experience top deck counterbore wear over time, which compromises the sealing interface between the cylinder liner flange and the engine head gasket surface. Left unaddressed, such wear can lead to head gasket failures, coolant intrusion, combustion gas leakage, liner movement, and ultimately expensive engine damage. Using the M30145 helps ensure that worn counterbores are precision-machined to accept a repair sleeve without full block replacement, safeguarding block integrity and extending engine life.
This conversion tool is intended for use with a larger base system such as the PT-2050 PT-2050-D / M52050 tooling platform and is ideal for engine remanufacturers, diesel machine shops, and heavy-duty fleet maintenance facilities that demand repeatable, accurate, and shop-grade counterbore restoration.
Key Features & Benefits
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Designed specifically for Detroit Diesel 60 Series (DDA) top-deck counterbore restoration.
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PT-2090 conversion kit for cutting counterbore seats to accept repair sleeves/bushings.
- Allows machining of even the most stubborn blocks.
Prevents costly head gasket failures, liner misalignment, and coolant leakage due to worn deck surface.
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Precision machining improves perpendicularity and surface finish for long-term engine reliability.
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Heavy-duty construction for repeated use in professional rebuild and remanufacturing environments.
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Works with PT-2050 / PT-2050-D / M52050 tooling bases (sold separately).
Applications
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Detroit Diesel 60 Series engines (11.1 L, 12.7 L, 14 L)
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Top-deck counterbore sleeve fitting and block restoration
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Engine rebuilds, remanufacturing, fleet service operations
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Heavy-duty diesel machine shops and professional rebuild centers
