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<h2>Bad exhaust manifold symptoms</h2><ul><li style="text-align: justify;">Exhaust leaks - Visible cracks, holes, or damage in the exhaust manifold, audible hissing or rumbling sounds coming from the engine compartment, and the smell of exhaust fumes inside the cabin.</li><li style="text-align: justify;">Engine performance issues - Rough or uneven engine idle, hesitation or loss of power during acceleration, and decrease in fuel efficiency.</li><li style="text-align: justify;">Increased emissions - Failed emissions or smog test, and increased visible exhaust smoke or soot.</li><li style="text-align: justify;">Overheating - Elevated engine temperature readings and the smell of burning or overheated components.</li><li style="text-align: justify;">Check engine light illumination - Diagnostic trouble codes related to the exhaust manifold or <a href="https://a-premium.com/oxygen-sensor">oxygen sensors</a>.</li><li style="text-align: justify;">Vibrations or noises - Rattling, banging, or other abnormal noises coming from the engine compartment, and increased overall engine vibrations.</li></ul><h2>A guide to exhaust manifold replacement</h2>To begin the exhaust manifold replacement process, the vehicle must be safely raised and secured on jack stands or a lift. The mechanic will then disconnect the negative battery cable to prevent any electrical issues during the repair. Next, they will locate the exhaust manifold, which is typically situated at the top of the engine, and begin disconnecting it from the rest of the exhaust system. This involves unbolting the manifold from the cylinder head as well as detaching it from the <a href="https://a-premium.com/catalytic-converter">catalytic converter </a>or downpipe flanges.With the old manifold removed, the mechanic will carefully inspect the mounting surface on the cylinder head to ensure it is free of any debris or damage. They will then install the new replacement manifold, taking care to properly align the bolt holes and create a tight seal with new gaskets. The manifold bolts are tightened to the manufacturer's specified torque, and the entire exhaust system is checked for leaks. Finally, the battery cable is reconnected, and the vehicle is lowered back to the ground, allowing the engine to be started and the repair to be thoroughly tested.<h2 style="text-align: justify;">A-Premium exhaust manifolds - Engineered excellence</h2>A-Premium exhaust manifolds deliver reliable performance and lasting durability. Crafted from premium heat-resistant alloys, our manifolds resist warping, cracking, and corrosion. The precision design ensures a perfect fit and secure, leak-free sealing. With enhanced vibration resistance and easy maintenance, A-Premium manifolds help maintain optimal exhaust flow for improved efficiency and emissions control. In addition to offering a 90-day free return policy and a 3-year warranty, our customer service team is available 24/7 to assist you. Trust A-Premium to keep your vehicle's exhaust system running at its best.

Exhaust Manifold

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Air Cleaner

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Air Filter Box

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Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Engine Cooling

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

2020 Lincoln Navigator Exhaust Manifold

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