How to Change the EGR Valve on a 1998 Isuzu Trooper

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If your check engine light is on and the mechanic or auto part store diagnosis your problem as the EGR valve for your 98' Trooper this article will help you to replace the part yourself. This part cost between $100 to $150 and is simple to replace.

Steps

1. 1
   Verify that the EGR valve needs to be replaced and purchase part.

   
   
2. 2
   Park vehicle on flat surface and open hood.
3. 3
   Allow vehicle engine to cool.
4. 4
   

   Remove negative battery terminal
   Remove (-) negative battery terminal.
5. 5
   

   Engine cover
   Remove plastic engine cover
6. 6
   

   EGR connection
   Disconnect wire connection from EGR
7. 7
   Spray some WD-40 around the base of the EGR and over the bolts to help loosen them.
8. 8
   

   12mm socket
   Using a 12mm socket with extension ratchet remove bolts
9. 9
   Remove old EGR and gasket from its base.
10. 10
    Clean EGR base (two in/out holes) with carb cleaner as there will be burnt residue and buildup.
11. 11
    

    EGR connection base
    Make sure base is clean and smooth before installing new EGR.
12. 12
    Spray a bit of carb cleaner into new EGR to prime it.
13. 13
    Set new gasket over base and place new EGR over it aligning it with the bolt holes.
14. 14
    Insert bolts and tighten using ratchet.
15. 15
    Reconnect wiring to new EGR.
16. 16
    Reconnect (-) negative terminal to battery

    
    

Tips

• Try removing the EGR and cleaning it and the intake valves with carb cleaner before purchasing a new one.

Warnings

• Allow the engine to cool before commencing work!

Things You'll Need

• Ratchet set (metric)
• 12mm socket
• New EGR valve
• Carburetor cleaner
• Shop towel

Sources and Citations

• http://autorepair.about.com/od/glossary/gr/def_egr-valve.htm
• http://www.doityourself.com/forum/passenger-cars-suv-service-repairs-no-trucks/166675-check-engine-light-isuzu-trooper.html
• 
  

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