Seal the water pump to the engine and keep coolant where it belongs with the MAHLE Engine Water Pump Gasket K27091. This engine water pump gasket forms the coolant-tight joint between the water pump and its mounting surface, so the pump can circulate coolant through the block and radiator without seepage — a worn or hardened gasket is a common source of coolant drips and weeping around the pump. It drops in across a wide range of GM-family vehicles, including the 1988-1999 Chevrolet C1500 (V6-4.3L, V8-5.0L, V8-5.7L), the 1999-2009 Chevrolet Silverado 1500 (V6-4.3L), and the 1985-2005 Chevrolet Astro (V6-4.3L), with hundreds more applications spanning engines from V8-4.4L to V8-7.4L — see the Buyer's Guide tab for the full list.
- Material: paper construction.
- Item grade: OEM Standard.
- Quantity per application varies: most listed engines use one, while some (such as the 1992-1993 Chevrolet C1500 V8-7.4L) call for two — confirm your engine's requirement.
- Country of origin: United States.
Replace the gasket whenever you service or swap the water pump to restore a clean coolant seal.
Interchange: 8-12555-493-0
8125554930 · 13032 · 10204452 · 3704168 · 3782611 · WP9235
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this water pump gasket do?
It forms the coolant-tight seal between the water pump and its mounting surface, letting the pump circulate coolant through the engine and radiator without leaking.
Will the MAHLE K27091 fit my vehicle?
It fits hundreds of GM-family applications, including the 1988-1999 Chevrolet C1500 and 1985-2005 Chevrolet Astro. Check the Buyer's Guide tab to confirm your exact year, model, and engine.
What is the gasket made of?
It uses paper construction and is rated OEM Standard grade.
How many gaskets does my engine need?
Quantity varies by application. Most listed engines use one, but some — such as the 1992-1993 Chevrolet C1500 V8-7.4L — use two. Verify your engine's requirement before ordering.
When should I replace this gasket?
Replace it any time you remove or swap the water pump, or if you see coolant weeping or dripping around the pump-to-engine joint, to restore a clean seal.
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