Mahle HS55390 Engine Cylinder Head Gasket Set

MAHLE Cylinder Head Gasket Set

MAHLE HS55390 is a cylinder head gasket set for select Cadillac, Chevrolet, Buick, and GMC applications. It is built for engine sealing service where dependable compression control and fluid separation are critical.

Key Features

• Engine cylinder head gasket set for sealing service
• MAHLE gasket construction trusted by OEMs and technicians
• Fits multiple GM platforms across Cadillac, Chevrolet, Buick, and GMC
• Application notes call for cylinder head bolt replacement on listed vehicles
• Part number HS55390 for accurate ordering and catalog lookup

Detailed Description

HS55390 is a MAHLE cylinder head gasket set engineered for repair work on engines that require a precise sealing interface between the cylinder head and engine block. MAHLE is known for sealing products used by OEMs and service professionals, and this set follows that focus on consistent fit and sealing performance. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible fitment includes Fits 2019-2023 Cadillac XT5, N/A; Fits 2020-2023 Cadillac XT6, N/A; Fits 2019-2023 Chevrolet Blazer, N/A; Fits 2019-2023 GMC Acadia, N/A; Fits 2019-2020 Buick Regal Sportback, N/A; Fits 2019-2020 Cadillac CT6, N/A; Fits 2019 Buick LaCrosse, N/A; Fits 2019 Cadillac CTS, N/A; Fits 2017-2018 Buick LaCrosse, N/A; Fits 2018 Buick Regal Sportback, N/A; Fits 2016-2018 Cadillac CT6, N/A; Fits 2016-2018 Cadillac CTS, N/A; Fits 2017-2018 Cadillac XT5, N/A; Fits 2017-2018 GMC Acadia, N/A.

What It Is Used For

• Restoring cylinder head sealing after engine service
• Addressing compression loss caused by gasket wear or damage
• Separating coolant and oil passages at the head interface
• Supporting repair work that requires head gasket replacement

Installation Notes and Tips

Review the vehicle-specific notes before installation. The listed applications call for cylinder head bolt replacement, so follow the service procedure for the engine being repaired. Clean mating surfaces thoroughly and verify all sealing surfaces are within specification before assembly. Use the exact fitment listing for the vehicle, including model year and application notes, when ordering HS55390.

Quality Assurance

MAHLE gaskets are used in OEM and professional service environments worldwide, with a focus on sealing consistency and application accuracy. HS55390 is identified by part number HS55390 for catalog verification and service matching.