Multiquip 8970871050 Piston Oversize 0.25

The Multiquip 8970871050 Piston Oversize 0.25 is a genuine OEM component designed for the TLG12SPX diesel powered generator. As a direct Multiquip OEM part, it is manufactured to the exact dimensions and material specifications required by the engine, ensuring proper ring seal, compression, and long-term cylinder integrity. This oversize piston is intended for engines that have been bored 0.25 mm over standard, making it the correct replacement when performing a top-end engine rebuild on TLG12SPX units.

Key Features

• Genuine OEM Piston Specification — Machined to exact bore tolerances required for proper ring seal and compression retention in the TLG12SPX engine.
• Oversize 0.25 Designation — Sized 0.25 mm over standard to match a properly bored cylinder, ensuring a correct fit without guesswork during engine rebuild.
• Direct TLG12SPX Fitment — Engineered specifically for the TLG12SPX diesel powered generator; confirms the right part for this engine application.
• Compression and Power Restoration — A correctly sized piston restores lost compression caused by cylinder wear, returning the generator to full rated output and stable operation.
• Engine Rebuild Confidence — Using the OEM piston during a top-end rebuild eliminates the risk of dimensional mismatch that can cause blow-by, oil consumption, or premature engine failure.

The piston is a core reciprocating component inside the engine cylinder, responsible for compressing the air-fuel mixture and transferring combustion force to the crankshaft. Over time, cylinder walls and piston skirts wear beyond serviceable limits, reducing compression and engine efficiency. An oversize piston — used after the cylinder has been bored to a matching oversize dimension — restores the proper clearance between piston and cylinder wall, recovering compression, reducing oil consumption, and bringing the engine back to reliable operating condition.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

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