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Thread: 3.0 EGR Valve - Have I got one?

  1. #1
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    Default 3.0 EGR Valve - Have I got one?

    Does anyone know if the 3.0 CDTi has the dreaded EGR valve?
    Mine has just hit 70k and has been very smoky for a while most notably going up hill.
    The other day I had a combination of car with spanner and the emission icon displayed, then the emission symbol stayed and the car with spanner disappeared. After taking it to an independent Vauxhall specialist he said the error code was saying it had a faulty EGR valve quote “which is odd as it doesn’t have one” Anyway they cleared the codes and all lights went off and he gave it a vigorous road test for 6 or 7 miles and all was well.
    Today it seemed very perky on the way to work, but after 18 miles of fast driving when I came to the edge of town it juddered and then the car with spanner symbol appeared again. For a few seconds it was OK but then went into limp home again.
    AND…. If it does have the quality EGR valve will the cleaning process described elsewhere apply to my 04 plate 3.0 Auto Signum?
    After months of lurking this is my first post, and I must say what a top forum it is!
    Thanks in advance.

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    Yes the 3.0 CDTI does have an EGR valve. I know this as I had the same problem a couple of months ago. All the symptoms were as you described.

    The good news for me was that the car was still under warranty at the time (05 plate) so Vauxhall fixed it free of charge. Still very annoying though and I hope it lasts longer this time.

  3. #3
    Full Member Big Sig's Avatar
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    its on the top left of the engine I believe. Maybe try to remove it and clean it.
    Now I need a turbo to keep up!

  4. #4
    Regular Member Gsi3.2's Avatar
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    it's in the vee on the 3ltr..just behind the cambelt housing... look under the intake plenumb and you'll see it..

    yes, if you feel brave enough to take it off ( quite a bit of stripping involved) then it will clean up just the same as the 1.9's ones do with carb cleaner and a soft brush..

    did mark the cabbys one 2 weeks ago and it's make a huge difference..

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    Regular Member Caterman's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 V6

    Year : 05

    Default

    Quote Originally Posted by Smisby View Post
    After taking it to an independent Vauxhall specialist he said the error code was saying it had a faulty EGR valve quote “which is odd as it doesn’t have one”
    some SPECIALIST he is

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    Regular Member Gsi3.2's Avatar
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    i'm saying nowt about his diagnosis.. ..

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    Full Member Big Sig's Avatar
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    My local dealer said mine doesn't have a map sensor..... which is odd as that was what was causing my problems a little while ago. Technicians my arse!
    Now I need a turbo to keep up!

  8. #8
    Regular Member Gsi3.2's Avatar
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    Quote Originally Posted by Big Sig View Post
    My local dealer said mine doesn't have a map sensor..... which is odd as that was what was causing my problems a little while ago. Technicians my arse!
    both goodun's and badun's out there..

  9. #9
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    Thumbs up

    Thanks for all the replies and info guys – lo and behold it ran faultlessly on the way home no error display’s of any kind so it got a good spanking to err “give it a clean out officer”!
    It’s in for a full service on Friday £175 + Gordon Browns cut using fully synth oil. I’ll give the handy info from above to the “specialist” and get him to clean it with the instructions from another post (reckon this is cheaper than a new one and re-fit?) unless anyone knows of an upgraded one that lasts a bit longer.

    I don’t mind after 70’043 miles it needing a £100 part it’s the bloomin limp home mode that’s pecked my head, I wish there was an acknowledge button to press like when its below 3 degrees or the washer fluids low!
    I did think about “having a go” myself but after seeing the plastics held down with 3 torq bolts I gave up and checked the oil. Am I right in thinking it will be less smoky (black smoke) with a clean/new EGR valve?

    Once again cheers guys!
    PS. Soz for the smilies I couldent resist

  10. #10
    Regular Member Gsi3.2's Avatar
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    to clean out the EGR you'll have to completely remove it of the car.. this means a whole heck of a lot of stripping to get to the ring clamp that holds it onto the water cooled exhaust 'manifold' that runs up the vee to it..access is poor again as there is 'JUST' enough room to get it out but you'll have a bit of a game on your hands.. you'll need to remove..

    the ECU pack on the top of the engine
    the breather that runs across to the intake hose
    the steel lines the run across the plenumb
    the electric trunking that runs across the plenumb
    the link pipe from the EGR to the plenumb
    the plenumb can be just undone, it's studs removed, and then the intake slid back slightly.
    the woven , heat proof jacket on the end of the HP fuel rail
    the plug on the pressure sender on the HP fuel rail

    when all this is off you can access the two small coolant hoses that run to and from the EGR ( expect loss of coolant ). the EGR is mounted with two bolts onto the engine and secured to the exhaust with a ring clamp held on with a bolt.. remove bolt and open clamp..the EGR needs moving sideways..

    clean VERY well with carb cleaner and a soft brush. Check the plunger moves as well..

    a failed EGR will let the smokey carbon gases past.. this can also cause problems with the boost pressure sender located in the back branch of the plenumb..it coats it in carbon and it gives poor readings leading to limp home..

    I suggest that a very careful session with the code reader is had, as there is normally more than just the EGR fault logged..
    Last edited by Gsi3.2; 13th May 2008 at 20:30.

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