what tool do i need to remove egr valve

How to Replace an EGR Valve

• Annotate

Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology.

Why Your EGR Valve Is Important

An frazzle gas recirculation (EGR) valve, when it is working correctly, recirculates exhaust gases through the engine to reduce emissions of oxides of nitrogen (NO_x).

Commonly, EGR valves don't totally fail. But stopped-upwards passages and ports will greatly bear on valve and engine operation.

A bad exhaust gas recirculation (EGR) valve tin cause several symptoms:

• hard starting
• rough idle
• hesitation during acceleration
• engine power loss
• overheating
• stalling
• bad fuel economy
• increased harmful emissions
• pinging
• detonation
• knocking
• surging

And so replacing the valve most often requires checking and removing buildup from passages and the intake manifold and sometimes from under the throttle body as well.

You want to know for sure the new or newly cleaned valve operates correctly; otherwise, driveability problems and high exhaust emissions will persist, even after installing the new valve.

How to Replace Your EGR Valve

This guide volition assistance y'all replace nigh common vacuum-controlled, electrical-vacuum-controlled, and other electronic-controlled EGR valves.

In almost models, replacing an exhaust gas recirculation (EGR) valve is not difficult. You lot can do information technology in your garage in well-nigh an hour or two, depending on your item system, using some common tools and a good solvent similar carburetor cleaner.

If yous need help, consult the vehicle repair manual for your particular car make and model. You tin can get an cheap aftermarket repair manual from ane of the local machine parts stores in town or guild ane from Amazon, like this Haynes manual. These manuals come up with footstep-past-step procedures and pictures for many maintenance and repair jobs y'all tin can practise at home.

Earlier you install the new unit, make sure you take the correct EGR valve replacement for your detail motorcar make and model. If you are replacing the valve, accept the old valve with you to the auto parts store and friction match information technology against the new ane. If you're ordering from a Web store, match your sometime valve confronting the pictures that may be shown on the site.

To get the right part, you'll need data about your detail car make and model and engine size. The vehicle identification number (VIN) can be useful to get the right valve calibration for your particular model. You tin can detect your VIN on your registration carte du jour or a modest plate on the commuter's side of the dashboard, meliorate seen through the windshield from outside the vehicle.

Some new EGR valves come up with their corresponding gaskets. If yours doesn't include one, buy the necessary gasket(due south), or buy gasket paper so that yous tin make your ain.

Index
Tools and Items Yous'll Need
I. Locating the EGR Valve
II. Removing the EGR Valve
Iii. Cleaning the Valve, Passages, and Ports
4. Installing the EGR Valve

• New EGR valve
• New EGR valve gasket
• Phillips screwdriver
• Standard screwdriver
• Adjustable wrench
• Box-finish wrench gear up
• Ratchet
• Socket wrench set up
• Tedious scraper or plastic scraper
• Safety goggles, if necessary
• Chemical resistant gloves, if necessary
• Carburetor cleaner, if necessary
• Scratch awl, if necessary
• Shop rag

I. Locating the EGR Valve

The EGR valve is ordinarily located effectually the superlative or backside of the engine, and to one side of the cylinder head, close to the intake manifold, or on the intake itself. Depending on your particular model, the EGR valve may connect to a pipe that goes to the exhaust manifold. But you won't accept much of a problem working with either blazon of valve.

If you're nevertheless unable to locate the valve, look it upwardly in your service manual, which probably has a photograph or prototype of the valve itself. But, if you don't have the manual, visit an auto parts store on the Web and look for the valve using the data from your vehicle. Many online stores volition have a picture of the particular valve you're looking for.

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II. Removing the EGR Valve

Different types of EGR systems are in use today. So you may need to disconnect more than than ane hose, electrical connector, or sensor to remove the EGR in your vehicle. If necessary, consult your vehicle repair manual.

1. Brand sure the engine is cool and disconnect the negative (black) battery terminal. Depending on your vehicle model, you may need to enter a security code to operate the radio or another electric device afterwards reconnecting the battery. Consult your car owner'southward manual and make sure yous take this information, if necessary.
2. Then, remove the engine cover or air cleaner duct, if necessary, to gain meliorate access to the EGR valve. Use a Phillips or standard screwdriver.
3. Disconnect the vacuum hose from the top of the valve by hand, depending on your model. If you need to remove more than than one vacuum hose, you lot may one to label each 1 to make sure you install back the hoses to their corresponding ports.
4. Check the condition of each vacuum hose. Replace those that bear witness signs of wear or impairment.
5. Unplug any electrical connectors from the EGR valve or sensors, as necessary.
6. Does your valve is connected to a steel pipage? Utilize an adaptable wrench to loosen the pipe nut.
7. And then, loosen and remove the two or three mounting bolts holding the valve in place using a box-end wrench or ratchet and socket. You may need to apply lubricant to the bolts, if they seem pretty tight. The bolts are continually exposed to oestrus and rust, which tin make them hard to remove.
8. If your valve is attached to a piping, finish disconnecting the valve from the pipe now.
9. Remove the EGR valve and valve gasket from its mounting.

Carbon buildup inside the intake manifold can too interfere with proper EGR system performance.

Photograph courtesy of Chris Norrick on Flickr

III. Cleaning the Valve, Passages, and Ports

The EGR organisation includes several components similar the EGR valve, hoses, sensors, control circuit, pipes, ports, and passages. Replacing a bad EGR valve without checking or cleaning these other components can pb to arrangement failure. Exhaust gases are prone to clog passages with carbon deposits wherever they catamenia. Make a visual inspection of exhaust passages through the system to make sure the new EGR valve volition work properly. On some vehicle models, yous may need to remove the fuel injectors or the intake manifold to properly dislodge carbon buildup from passages. Consult your repair manual, if necessary.

• After y'all have removed the valve, use a dull or plastic scraper to remove any traces of gasket cloth off the base of the valve (if you lot're reusing the same valve), and the intake or frazzle mounting surface.
• To remove buildup, put on your goggles and chemical-resistant gloves and spray carburetor cleaner on it. If y'all are cleaning the valve itself, be careful not to let solvent reach the valve'southward diaphragm or electric circuits or contacts.
• Let the carbon soak in the solvent and then employ the scratch awl (or screwdriver or some other similar tool) to scratch off carbon deposits from around ports and passages. Exist careful not to scratch the mounting surfaces, though. A stiff wire brush is an ideal tool for the job, but, often, carbon deposits can be difficult as a stone to remove.
• Some newer engine models employ multiple EGR ports. Sometimes it'south necessary to remove the intake manifold to properly clean all the ports to avert driveability issues. If y'all demand to remove the intake manifold, you may demand to supersede the intake gasket also. Consult your vehicle repair manual, if necessary.
• Bank check the throttle trunk diameter and plate for carbon buildup and clean every bit necessary.
• Utilize the pipage cleaning wire brush and a shop rag to clean inside a pipe, port or intake as necessary. For more help with maintaining your new EGR valve and the EGR system exhaust passages, check this post: How to Clean an EGR Valve.

The next video gives y'all some visual clues about how to make clean the EGR valve.

Utilise a torque wrench to tighten the EGR valve bolts.

Photo courtes of J.C. Fields on Wikimedia.

IV. Installing the EGR Valve

Installing the EGR valve is a simple process. However, yous need to make sure the valve is properly seated and tighten the bolts to the proper torque.

1. Position the new valve against the pipage and thread the pipage'south nut past paw, if yours comes equipped with it.
2. Position a new gasket and start the valve's mounting bolts through the EGR and gasket by manus.
3. Tighten the mounting bolts with the wrench — and the piping, if equipped, with the adjustable wrench. Then, terminate tightening the bolts with the torque wrench to foreclose overtightening the bolts and damaging the gasket, or leaving the bolts loose and crusade a leak. Check the bolts' torque specifications for your application in your vehicle repair manual.
4. Plug in the valve electric connector, reattach vacuum hoses, and replace the air cleaner duct and whatsoever other components you had to remove to gain access to the valve.
5. Connect the negative (black) bombardment terminal.
6. Start the engine and cheque that the EGR valve is working correctly and there are no vacuum leaks.

In the side by side video, you can watch the installation of an EGR valve.

Replacing a faulty EGR valve doesn't involve too much work, but removing carbon buildup from passages, ports, intake, and other places may take some effort. Removing buildup will help increase the valve's service life and help skilful engine operation. The main causes of carbon buildup are driving mostly short trips or within the urban center, and an increase in engine oil consumption due to wear and tear.

If possible, make a quick check of the passages nether the EGR valve every other year, and clean the organization as necessary or near every threescore months to prevent driveability issues. Cheque your vehicle service transmission for the maintenance intervals of the emission command system.

Test Your Noesis of EGR Valves

For each question, choose the best answer. The answer key is below.

1. Function of an EGR Valve
   • Helps amend engine lubrication
   • Helps the estimator command timing
   • Helps to purge of exhaust gases
   • Helps reduce Oxides of Nitrogen (NOx)
   • Helps to prevent coolant from boiling
2. What is 1 cause of carbon buildup in the EGR valve's passages and ports?
   • Driving short trips and in the urban center
   • Warped rotors
   • Worn-out clutch
3. Which of these will NOT assistance y'all get carbon off your EGR valve?
   • Carburetor cleaner
   • A scratch awl
   • A steel brush
   • Windshield wiper solution

Answer Key

1. Helps reduce Oxides of Nitrogen (NOx)
2. Driving curt trips and in the metropolis
3. Windshield wiper solution

This article is authentic and true to the all-time of the author's knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional person communication in business organisation, fiscal, legal, or technical matters.

Questions & Answers

Question: Where do the EGR and vacuum hoses continue my 1998 Nissan Pathfinder?

Answer: I believe this photograph will assist you locate the valve. It's the round component under the hoses:

https://i.ytimg.com/6/d6nXckjYq9c/hqdefault.jpg

© 2015 Dan Ferrell

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