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Thread: V6 CDTI engine issues

  1. #1
    Regular Member bigdave1701's Avatar
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    Default V6 CDTI engine issues

    Are the V6 CDTI engines subject to the same issues as the 1.9 CDTI? (ie; inlet maniflold/egr, DMF etc..)

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    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

    Default

    Dmf yes as you'll be lucky to fine a derv that doesn't suffer dmf failure.

    Egr not so much. The facelift (z30dt) have dpf I believe so these can fail.

    The problems on the v6 are mainly Scv's ( suction control valves) an cause fuel related problems miss fire etc.
    And also can have other fuel related problems.

    Some people have reported egr problems on them aswel.

    The biggest to keep on eye on id the temp gauge v6 suffer from heat and the liners can sink

  3. #3
    Regular Member marktaylor's Avatar
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    Inlet no
    Egr - very rarely only hear of nicks going bad
    Dmf - ill say yes as can be the same
    On any type of engine that has it

    I've had my v6 for 26 months now and touch wood only had wear and rear replacements ( ie brakes , drop links , wheel bearing )


    Sent from my iPhone using My thumb

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    Regular Member bigdave1701's Avatar
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    Cheers guys. So when test driving I need to check for the usual DMF rattle, check the temp gauge is getting up to 80-90º, How to I check the SCVs?

  5. #5
    Regular Member bigdave1701's Avatar
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    I thought I'd asked a similar question about 12 months ago...

    http://www.vectra-c.com/forum/showth...ght=cdti+guide

    Thought I'd re link just in case anyone else is looking for similar answers.

  6. #6
    Regular Member m8internet's Avatar
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    Quote Originally Posted by bigdave1701 View Post
    How to I check the SCVs?
    If completed under warranty, check with Sureguard
    If not completed under warranty, then a receipt is required, otherwise it is guess work
    However it is possible to check on TECH2
    If this is still inconclusive, then test drive should confirm if this issue exists

    There shouldn't be an issue with the temperature gauge as it should go straight to 80 as soon as the engine has warmed up and moving

    The DMF affects other engines too, so I classify it as Vectra issue, along with lamps, CIM, springs, shocks, etc

    The fuel filter cannot cope with the long service intervals (30K miles / 2 years) and I personally suspect this was instrumental in premature SCV failure
    General concensus is to replace it at 10K miles / 1 year instead

    There doesn't really seem to be anything else engine specifically that is an issue
    However some of us (who have probably had the SCV upgrade / repair) occasionally suffer excessive black smoke followed by safe mode, but this usually only happens once every 3 months / 5K miles

    I am currently investigating a noise around the auxiliary drive belt / tensioner, which other people have also reported
    This is an odd one though as the auxiliary belt has an odd out of sequence change interval (like the cambelt) but I suspect the tensioner itself has a life span of about 6 years / 100K miles
    In the same way as the cambelt interval on VX engines is reduced (from 80K to 40K miles), I am considering swapping this to an inspection at 60K miles and replacement belt and tensioner at the same time as the cambelt

    Another issue (using the term loosely) are failed liners
    However, this is pretty much the end of the engine, as the cost is so high to replace them

  7. #7
    Regular Member bigdave1701's Avatar
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    Thanks for the info m8internet.

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    Regular Member Sigmacca's Avatar
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    Had my 3.0 V6 since last July and so far touch wood just one drop link £28 fitted, MOT next month so fingers crossed



    This engine sure will put a smile on your face, Press 'Sport' button and prepare to grin

  9. #9
    Regular Member m8internet's Avatar
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    Quote Originally Posted by Sigmacca View Post
    Had my 3.0 V6 since last July and so far touch wood just one drop link £28 fitted
    You should really replace both sides, the other side won't be far behind
    Equally, as it is suspension component it's not engine specific and so all Vectra suffer this same issue
    Typical life is about 100K miles / 5 years

  10. #10
    Regular Member Hideous's Avatar
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    another thing we've seen cropping up on the forum on a number of occasions with the v6 diesel - is fuel pump failure. very expensive problem if it occurs.

    like all cars, there's good and bad. i remember a forum member called "willco" or something like that, and his v6 was a money pit (luckily under warranty). everything went wrong with that one!

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