Mahle HS55378 Engine Cylinder Head Gasket Set

Engine Cylinder Head Gasket Set Overview

Mahle HS55378 is an engine cylinder head gasket set for select Mercedes-Benz V8 applications. It is built for sealing the cylinder head to the engine block and is listed for multiple GLS550, SL550, CLS550, E550, S550, GL550, CL550, GL450, and ML550 applications.

Key Features

• Engine cylinder head gasket set for sealing critical combustion and coolant passages.
• Fits select Mercedes-Benz models with application-specific coverage.
• MAHLE gaskets are trusted by OEMs and technicians worldwide.
• Part number HS55378 for catalog and fitment verification.

Detailed Description

Mahle HS55378 is a cylinder head gasket set engineered for sealing performance in select Mercedes-Benz vehicles. This gasket set is used in repairs where the cylinder head must be removed and resealed, helping restore compression integrity and maintain separation between oil, coolant, and combustion chambers. Fits 2012-2018 Mercedes-Benz CLS550, N/A; Fits 2012-2017 Mercedes-Benz E550, N/A; Fits 2012-2017 Mercedes-Benz S550, N/A; Fits 2013-2019 Mercedes-Benz SL550, N/A; Fits 2017-2019 Mercedes-Benz GLS550, N/A. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Replacing a leaking cylinder head gasket on a Mercedes-Benz engine.
• Restoring compression loss caused by gasket failure.
• Addressing coolant or oil mixing at the head-to-block sealing surface.
• Supporting repair work after cylinder head service or overhaul.

Installation Notes and Tips

Confirm engine code and exact vehicle application before ordering. Cylinder head bolts are not included and replacement is recommended during installation. Follow factory torque procedures, surface preparation requirements, and sequence specifications for proper sealing. Verify all mating surfaces are clean and flat before assembly.

Quality Assurance

MAHLE gaskets are supplied to meet the sealing standards expected by OEMs and professional technicians. Part number HS55378 should be matched to the vehicle application before installation.