Exhaust system Mcm 1981+ Gm454 /330/340/370 - Item MARV8-7K

• Exhaust system Mcm 1981+ Gm454 /330/340/370 - Item MARV8-7K

Exhaust system Mcm 1981+ Gm454 /330/340/370

This exhaust component feeds exhaust gas and, depending on the design, injected cooling water from the manifold into the downstream wet exhaust tract.

It is installed in the area of the manifold, riser or exhaust pipe. Corrosion, cracking or internal wall erosion can lead to leakage, water ingress or thermal overload.

Component classification: Exhaust component / wet exhaust component

System function: Exhaust gas routing in the marine wet exhaust system

Compatible manufacturers: MerCruiser

Compatible models: Exhaust system Mcm + Gm454 /330/340/370

Reference numbers:

• OEM / COMPARISON NUMBER: 1981
• OEM: MARV8-7K

FAQ

What exactly is the task / function of the component?
The exhaust component guides exhaust gas and, depending on the version, cooling water safely from the engine into the downstream exhaust tract. It is subject to high thermal and corrosive loads and at the same time influences the back pressure and water safety of the engine.

How can you recognize a defect / typical symptoms?
Defects are indicated by exhaust gas leakage, traces of rust, loss of cooling water, internal corrosion, increased surface temperatures or, in extreme cases, water ingress into the engine. Cracking and internal wall erosion are typical damage mechanisms.

How do you inspect / test the component?
External and internal corrosion, sealing surfaces, wall thickness, water channels and tightness are tested using a pressure or push-off test. It is particularly important to check for internal rust penetration and free movement of the cooling water flow.

When should it be replaced?
The component should be replaced if it is cracked, rusted through, internally detached or at any connection between the water and exhaust sides. Depending on the age and findings, a preventive replacement is also advisable for salt water-operated systems.

How do you check compatibility?
The OEM number, motor side or bank, connection diagram, hose diameter, sensor or thread positions and the exact wet or dry design must be compared. The height, angle and seal variant must also be correct.