Description
Overview:
The through bolt is a critical fastener used to clamp and secure major engine components on Robin/Subaru small engines. Built from durable steel, it maintains structural integrity under load and vibration, helping the engine hold alignment and seal correctly during operation. This replacement through bolt is intended for engines used across construction and garden machinery, including compactors, generators, pumps and similar equipment. It is a direct-fit option for the Robin/Subaru DY23 and DY27 models, with OEM reference 243-70570-08 to help ensure correct identification and selection. Replacing a worn, stretched or damaged through bolt during servicing can prevent loosening, oil leaks and premature wear, supporting reliable performance in demanding site and outdoor conditions.
Key Features:
- Steel construction for strength and long service life under engine vibration and heat cycles
- OEM reference 243-70570-08 for accurate matching and straightforward parts identification
- Precision threads for consistent clamping force and reliable re-torque during maintenance
- Helps maintain crankcase/component alignment and sealing integrity
- Suitable for engines used in construction and garden machinery environments
- Compatible fit for DY23 and DY27 engines to minimise downtime
- Straightforward installation using standard hand tools and workshop practices
- Ideal as a preventative replacement when original fasteners show corrosion, damage or stretch
- Supports stable engine operation by resisting loosening under thermal and mechanical loads
- Practical spare to keep on hand for rebuilds and scheduled overhauls
Typical Applications:
Used during engine rebuilds, overhauls and routine repairs to secure crankcase and related assemblies on Robin/Subaru engines. Common in equipment such as plate compactors, generators and water pumps where sustained vibration and load demand reliable fasteners. Replace when fasteners are missing, stretched, corroded or after major disassembly to restore safe clamping.
Also known as:
Engine through bolt, crankcase through bolt, case bolt, engine assembly bolt, long engine bolt, internal engine fastener, Robin/Subaru DY-series through bolt.
Fits Models:
DY23, DY27
Alternate Part Numbers:
243-70570-08, 2437057008
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