Mahle 4021 Engine Cylinder Head Gasket

Mahle 4021 Cylinder Head Gasket

The Mahle 4021 engine cylinder head gasket is an OEM-standard sealing solution for select Chevrolet, GMC, and Hummer applications. Built from composite material with a standard 0.04 in. (1.07 mm) thickness, it is specified for 105.41 mm (4.15 in.) cylinder bore diameter applications and is listed with torque-to-yield fastener requirements.

Key Features

• Composite cylinder head gasket material for dependable sealing performance
• OEM-standard item grade for factory-style service replacement
• Standard thickness: 0.04 in. / 1.07 mm
• 105.41 mm / 4.15 in. cylinder bore diameter
• Gasket sealant not included
• Torque-to-yield fastener application noted
• Mahle 4021 engine gasket for cylinder head service

Detailed Description

Mahle 4021 is a composite engine cylinder head gasket engineered for vehicles that require a standard-thickness head gasket and torque-to-yield fastener service. Mahle supplies sealing products used by OEMs and technicians worldwide, and this gasket follows that service-focused approach with an OEM-standard construction. This part cross-references FEL-PRO 9701 PT for the same application. It is also associated with General Motors 12554979 and 12556031, as well as Rol HG34030.

Compatible With select 1992-2004 Chevrolet and GMC trucks, vans, and SUVs, including Chevrolet C1500, K1500, C2500, K2500, C3500, K3500, Express 2500, Express 3500, Tahoe, Suburban models, and GMC C1500, K1500, C2500, K2500, C3500, K3500, Savana 2500, Savana 3500, Yukon, and Hummer H1 applications listed below.

What This Part Helps Address

• Coolant leakage at the cylinder head sealing surface
• Compression loss between the cylinder head and engine block
• Combustion gas seepage caused by a worn head gasket
• Oil and coolant cross-contamination from a failing seal
• Service replacement needs during cylinder head repair

Installation Notes and Tips

Confirm engine code, bore size, and gasket thickness before installation. The fitment notes specify replacement of cylinder head bolts is recommended, which is especially important on torque-to-yield applications. Clean and inspect the head and block mating surfaces carefully, and follow the manufacturer’s torque sequence and specifications during assembly. Use this Mahle 4021 gasket only on the listed applications and verify the vehicle’s year, make, and model before ordering.

Quality Assurance

Mahle is known for OEM-level sealing products used in professional engine service. The 4021 head gasket is built to OEM-standard expectations for fit and sealing performance in the listed Chevrolet, GMC, and Hummer applications.

• Fits 2002-2004 Hummer H1, N/A
• Fits 1996-2002 Chevrolet Express 2500, N/A
• Fits 1996-2002 Chevrolet Express 3500, N/A
• Fits 1996-2002 GMC Savana 2500, N/A
• Fits 1996-2002 GMC Savana 3500, N/A
• Fits 1992-2000 Chevrolet C2500, N/A
• Fits 1992-2000 Chevrolet C3500, N/A
• Fits 1992-2000 Chevrolet K2500, N/A
• Fits 1992-2000 Chevrolet K3500, N/A
• Fits 1992-2000 GMC C2500, N/A
• Fits 1992-2000 GMC K2500, N/A
• Fits 1992-2000 GMC K3500, N/A
• Fits 1994-1999 Chevrolet C1500 Suburban, N/A
• Fits 1994-1999 Chevrolet C2500 Suburban, N/A
• Fits 1994-1999 Chevrolet K1500 Suburban, N/A
• Fits 1994-1999 Chevrolet K2500 Suburban, N/A
• Fits 1994-1999 Chevrolet P30, N/A
• Fits 1995-1999 Chevrolet Tahoe, N/A
• Fits 1995-1999 GMC C1500 Suburban, N/A
• Fits 1994-1999 GMC C2500 Suburban, N/A
• Fits 1995-1999 GMC K1500 Suburban, N/A
• Fits 1994-1999 GMC K2500 Suburban, N/A
• Fits 1994-1999 GMC P3500, N/A
• Fits 1994-1998 Chevrolet C1500, N/A
• Fits 1994-1998 Chevrolet K1500, N/A
• Fits 1994-1997 GMC C1500, N/A
• Fits 1994-1997 GMC Yukon, N/A
• Fits 1994-1996 Chevrolet G30, N/A
• Fits 1994-1996 GMC G3500, N/A
• Fits 1994-1995 Chevrolet G20, N/A
• Fits 1994-1995 GMC G2500, N/A
• Fits 1994 Chevrolet Blazer, N/A