How To Clean Oil Valve Return Tubes On 2002 Corolla

Is you Corolla leaking or consuming oil? Giving off a whining or whistling sound? Fouling up its air filter with oil? Or not giving you lot the same gas mileage equally information technology used to? Yous may have a clogged or sticking PCV valve.

Read on to decide how and when to change the PCV valve in a Corolla. This guide should apply to the following year Corollas: 2003-2008. The vehicle shown hither in this guide is a 2004.

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Tools and Supplies Used:

socket wrench
10mm socket
22mm socket
torque wrench
pliers
PCV valve (Fram FV406)

Diagnosing a Bad PCV Valve

A PCV (positive crankcase ventilation) valve is about a $10 part that plays an important role in routing partially combusted air and fuel from the crankcase part of the engine back through the intake manifold to the cylinders. If this were non done, the gases would be released into the atmosphere. Problems arise when the PCV valve is clogged or non working properly.

Typical problems associated with a bad or plugged PCV valve include:

vehicle hesitation while driving
oil leaks
backlog oil consumption
oily or otherwise fouled engine air filter
whining noise coming from the engine bay

Even if you aren't experiencing whatever of these bug, many people replace the PCV valve every 50,000-100,000 miles, as a sort of cheap insurance. Since continuing to bulldoze with a chock-full PCV valve can lead to engine sludge, running low on oil, and other problems, it is non a bad thought to change it somewhat regularly, if not often.

A shop will accuse you around $75 to alter the PCV valve in your vehicle. But it is a actually easy part to change, and the bodily role is nigh $10, therefore I recommend doing it yourself. Information technology will take about thirty minutes if you take your time.

PCV Valve Replacement Guide – Toyota Corolla

Here is the procedure for irresolute out the PCV valve in a Toyota Corolla

Step 1: Acquire a New PCV Valve

PCV valves are relatively cheap. They're alot less expensive if you buy them online vs an auto parts store. I bought this PCV valve from Amazon.

01-Corolla-PCV-Valve-with-Box 02-new-pcv-valve-corolla

Step ii: Pop the Hood and Remove the Plastic Engine Cover.

Commencement, popular the hood and prop information technology up. Use a 10mm socket to remove the 2 nuts holding on the plastic engine encompass.

03-remove-engine-cover

Don't drop the nut similar we did. It tends to get lodged somewhere underneath near the alternator.

04-remove-10mm-nuts-qty-2

Lift the plastic housing off of the engine.

05-remove-engine-cover

Footstep 3: Locate the PCV Valve.

The PCV valve is located near the dorsum right side of the engine aft of the oil fill cap, with a hose coming out of it.

06-corolla-engine

Here is a little closer view.

07-pcv-valve-location-corolla

And here is an even closer view.

Stride four: Utilize a Pliers to Remove the Hose Clamp.

With a pliers, squeeze the hose clamp and pull the hose off of the old PCV valve.

09-remove-pcv-valve-hose-clamp 10-remove-hose-from-pcv-valve 11-pcv-valve-old-22mm-hex

Step 5: Use a 22mm Socket to Remove the Onetime PCV Valve.

A deeper socket volition work best, since the stem of the PCV valve sticks out a means, although this one worked fine. Alternatively, use a 22mm wrench or crescent wrench (gasp!).

12-remove-old-pcv-valve-22mm-socket

Pace half-dozen: Pull out the Old PCV Valve and Inspect.

This one was due for a alter. This motorcar has 293,000 miles on information technology, and the PCV valve has never been inverse.

13-remove-old-pcv-valve

Effort to minimize the amount of debris that falls into the valve port.

14-old-pcv-valve-removed-corolla

Audit the old PCV valve. Milkshake it dorsum and along. If yous hear something freely rattling around in there, it is probably still okay. If you don't hear anything, or if information technology takes more than a gentle milk shake to hear something, it is clogged or fouled and should be replaced.

14b-old-pcv-valve-removed-fouled