Description

Intake Manifold Gasket for Alfa Romeo 147, 156, 159 & GT | OEM 46816020

A leaking intake manifold gasket can significantly affect the performance and efficiency of your Alfa Romeo diesel engine. Loss of sealing between the intake manifold and cylinder head may lead to reduced engine power, rough idle, poor fuel economy, and increased exhaust emissions.

The CNM Auto Parts Intake Manifold Gasket – OEM 46816020 is manufactured to provide an accurate fit, reliable sealing, and long service life for Alfa Romeo JTD/JTDM engines.

What Does the Intake Manifold Gasket Do?

The intake manifold gasket creates an airtight seal between the intake manifold and the cylinder head.

Its job is to:

• Prevent air leaks
• Maintain proper intake pressure
• Ensure correct air distribution to each cylinder
• Support efficient combustion
• Improve engine performance and fuel economy

Even a small intake leak can affect engine operation and trigger fault codes.

Common Symptoms of a Failed Intake Manifold Gasket

A damaged intake manifold gasket may cause:

• Loss of engine power
• Rough idle
• Whistling or hissing noises
• Increased fuel consumption
• Check Engine Light
• Reduced turbo efficiency
• Poor acceleration
• Black exhaust smoke under load

Replacing the gasket restores proper sealing and helps return the engine to its intended performance.

Why Do Intake Manifold Gaskets Fail?

Over time, intake manifold gaskets are exposed to:

• High engine temperatures
• Constant heat cycles
• Engine vibration
• Oil contamination
• Carbon deposits
• Age-related hardening

Eventually, the gasket loses elasticity and can no longer provide an effective seal.

Compatible Vehicles

Designed for selected Alfa Romeo diesel models including:

• Alfa Romeo 147
• Alfa Romeo 156
• Alfa Romeo 159
• Alfa Romeo GT

Compatible with various 1.9 JTD / JTDM 16V engine applications.

Always verify compatibility using your VIN number or OEM reference before ordering.

OEM Reference

Direct replacement for:

OEM 46816020

Cross references may also include:

• 55191883
• 46773082
• 93179058

Depending on vehicle manufacturer and engine version.

Why Choose CNM Auto Parts?

Our intake manifold gasket is engineered for dependable sealing performance.

Features include:

• Precision-cut profile
• OEM-quality fit
• Excellent heat resistance
• Oil-resistant sealing material
• Long service life
• Direct replacement installation

Each gasket is manufactured with dimensional accuracy to ensure reliable sealing under demanding operating conditions.

Installation Tips

For the best repair:

• Remove all old gasket material.
• Clean both sealing surfaces thoroughly.
• Inspect the intake manifold for cracks or warping.
• Tighten bolts in the correct sequence using manufacturer torque specifications.
• Inspect the intake system for vacuum leaks after installation.

Replacing the gasket during intake manifold cleaning or swirl flap service can save significant labor.

Frequently Asked Questions

Can an intake manifold gasket cause power loss?

Yes. Air leaks after the airflow sensor can disturb the air-fuel ratio, reducing engine performance and efficiency.

Should I replace all manifold gaskets together?

Yes. Replacing the complete set helps ensure uniform sealing and reduces the likelihood of future leaks.

Is this a direct OEM replacement?

Yes. The CNM Auto Parts gasket is designed as a direct replacement for OEM 46816020 with no modifications required.

Restore Engine Performance

A properly sealed intake system is essential for efficient combustion, smooth engine operation, and maximum diesel performance.

The CNM Auto Parts Intake Manifold Gasket – OEM 46816020 is manufactured to provide reliable sealing for Alfa Romeo JTD/JTDM engines, helping restore performance and long-term reliability.