Intake Manifold Repair: How to Seal Leaks

What You'll Need
WD-40 Lubricant
Inspection mirror
Carburetor cleaner
Piece of cloth

Intake manifold repair requires fundamental troubleshooting know-how and eager attitude. Intake manifold sits on top of your car’s engine which transports fuel and air inside to the combustion chamber of the engine. Also, the intake manifold conveys coolant and vacuum via the system. Any air leak within the intake manifold might lead to stalling, weak idle quality, inferior fuel economy, as well as vacuum loss. As any air leak places no observable traces, pinpointing one is rather trickier than locating a typical fuel or coolant leak.

Step 1 – Inspect Leaks

Start your car engine cold; however do not delay it to heat up to working temperature prior starting the assessment. Often, leaks seal themselves since the intake expands as brought to complete operating temperature.

Lift your car’s hood and use inspection mirror and flashlight to execute a visual assessment of its intake manifold. Search for any indications of cracks along the manifold's exterior. Depending on your car’s model and manufacturer, you might need to disengage an engine cover, shift hoses aside as well as employ the inspection mirror to observe the entire intake manifold’s surface.

Step 2 – Use Carburetor Cleaner

Spray carburetor cleaner in fast sprays above the intake manifold. Spray once and then pay attention to the engine idle speed. If the idle speed does not change, keep going to the next section. Continue doing it until you find a place that idle speed increases. This will indicate a crack or leaky gasket.

Step 3 – Prepare for Fixing

Having an intake manifold leak in your car can cause performance problems. Ensuring that the leak gets sealed is vital if you wish your car to perform at its best. Since the intake manifold is responsible for dealing out the combination of both air and fuel to every engine's intake ports, repairing these kinds of leaks is vital when striving to acquire the most from your car’s engine.

Step 4 – Disengage the Fuel Rail

Disconnect first the battery then remove the air ducts and nylon fuel rail. After the fuel rail is detached, push the injector connectors' wires using your fingers to remove them. Make use of a screwdriver to aid unfasten the rubber rings. It aids in detaching them easier.

Step 5 – Seal the Leaks

You should remove the intake manifold and the throttle body. When this is accomplished, you need to loosen the two nuts which are fastened to the EGR pipe and then disengage it.

Examine your engine’s intake manifold then remove any gaskets, replacing them with new ones. Reinstall all parts that you just took off. Now, it should fix the leak of your intake manifold.