This is a precision-engineered gasket designed to seal the exhaust manifold to the cylinder head, preventing exhaust gas leaks. It is made from high-temperature resistant composite materials, ensuring a durable seal that a worn or damaged gasket cannot provide. Operators might notice a loud exhaust noise, loss of engine power, or black soot around the manifold connection if this gasket fails.
Always verify with serial number before ordering.
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Alternate part numbers that interchange with Volvo 20855371
Fitment: Volvo Trucks: FH/FM/FMX D13A/B/C, Renault Trucks: Kerax, Magnum DXi13, C/K/T-Range, Volvo Bus: B9/11/12/13 [D/DH Engine] D13C/F
Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
The first indication of a failing gasket is often an audible increase in exhaust noise or a ticking sound from the engine. If ignored, exhaust gases can leak, leading to reduced engine performance and potential damage to surrounding components from heat and soot. Continued operation with a leaking gasket can compromise engine efficiency and emissions.
Thoroughly clean both the cylinder head and exhaust manifold mating surfaces to ensure a perfect seal. Avoid reusing old gasket material or debris between the surfaces.
Inspect the exhaust manifold for cracks and check the condition of the manifold mounting bolts and studs.