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Pelican Technical Article:

Engine Crankcase Valve Replacement

Jared Fenton

Time:

1 hour1 hr

Tab:

$60

Talent:

*

Tools:

Pliers, small screwdriver

Applicable Models:

Jetta MkIV 2.0L (1998-05)

Parts Required:

Engine crankcase valve

Hot Tip:

Make sure the valve is installed correctly

Performance Gain:

Vehicle passes emissions testing

Complementary Modification:

Full vehicle tune-up

Is your car having trouble passing emissions testing? Does it seem to be burning oil but a compression test shows normal results? The problem may be the engine crankcase valve (ECV). This valve allows the air pressure generated from the rotation of the crankshaft to be circulated back into the intake manifold. If the ECV valve starts leaking, it will also allow oil to be circulated back into the intake manifold, guaranteeing you'll fail a smog check.

Replacement is easy and should take no more than an hour. You will need to remove the power steering fluid reservoir to gain access to the ECV. See our article on Power Steering Fluid Reservoir Replacement for more information.

The ECV valve is located directly behind the washer fluid reservoir on the left side of the engine compartment.
Figure 1

The ECV valve is located directly behind the washer fluid reservoir on the left side of the engine compartment. You'll need to move the power steering fluid reservoir to access the ECV. See our article on Power Steering Fluid Reservoir Replacement for more information. Press the tab (green arrow) on the electrical connector and pull it off the valve. Then pull the rubber bracket (yellow arrow) holding the ECV to the chassis off.

You'll need to use a pair of pliers to squeeze open the hose clamps (green arrows) holding the vacuum lines to the ECV.
Figure 2

You'll need to use a pair of pliers to squeeze open the hose clamps (green arrows) holding the vacuum lines to the ECV. Slide back the hose clamps and pull the hoses off the valve.

Once the hoses are removed, transfer the rubber retaining collar from the old ECV to the new one.
Figure 3

Once the hoses are removed, transfer the rubber retaining collar from the old ECV to the new one. Note the groove (green arrow) molded into the rubber. This slides over the tab (yellow arrow) on the ECV. It is also important to note the arrow. The new valve must be oriented in the same way when connecting the hoses.

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